{"id":35907,"date":"2026-05-02T18:41:42","date_gmt":"2026-05-02T17:41:42","guid":{"rendered":"https:\/\/jegharkraeft.dk\/?p=35907"},"modified":"2026-05-02T18:41:53","modified_gmt":"2026-05-02T17:41:53","slug":"opc-grape-seed-extract","status":"publish","type":"post","link":"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/","title":{"rendered":"Grape seed extract and cancer. Proanthocyanidins cancer. OPC and cancer. Grape seed extract chemotherapy."},"content":{"rendered":"\n<div class=\"wp-block-group alignfull is-style-section-5 has-contrast-color has-base-background-color has-text-color has-background has-link-color wp-elements-15068e49ed94b3fb894b0dfca456f410 has-global-padding is-layout-constrained wp-block-group-is-layout-constrained is-style-section-5--2\" id=\"menu\" style=\"margin-top:0;margin-bottom:0;padding-top:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-ca2dd60b wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading has-custom-int-link-p-sort-1-color has-text-color has-link-color wp-elements-a867a5e69af727a1b962d2b1d75fb9e7\"><span class=\"ez-toc-section\" id=\"Dietary_Supplements_Grouped_by_Effect\"><\/span><a href=\"https:\/\/jegharkraeft.dk\/en\/kosttilskud-grupperet\/\"><\/a><a href=\"https:\/\/jegharkraeft.dk\/en\/kosttilskud-grupperet\/\">Dietary Supplements Grouped by Effect<\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dietary_Supplements_Alphabetical\"><\/span><a href=\"https:\/\/jegharkraeft.dk\/en\/supplements-alphabetically\/\">Dietary Supplements Alphabetical<\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h4 class=\"wp-block-heading has-custom-int-link-p-sort-1-color has-text-color has-link-color wp-elements-e4489ff8bde8fce5b84cb30139d13001\"><a href=\"https:\/\/jegharkraeft.dk\/en\/acai-berries-and-cancer\/\">A,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/baicalin\/\">B,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/cats-claw-tomentosa\/\">C,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/danshen\/\">D,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/echinacea\/\">E+F,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/garcinia-cambogia\/\">G,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/hemp-seeds\/\">H,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/indol-3-carbinol\/\">I+J+K,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/lions-mane\/\">L,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/maitake\/\">M,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/?p=35837\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-hvid-tekst-color\">N,<\/mark><\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/omega-3\/\">O,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/peppermint\/\">P<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-interne-links-color\">,<\/mark><\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/quercetin\/\">Q,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/reishi\/\">R,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/selenium\/\">S,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/thc-cannabis\/\">T,<\/a><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-sort-tekst-color\">.<\/mark> <a href=\"https:\/\/jegharkraeft.dk\/en\/vitamin-b\/\">U+V+Z<\/a><\/h4>\n\n\n\n<ul class=\"wp-block-list has-custom-hvid-tekst-color has-text-color has-link-color wp-elements-0204884e4dfdfa70d74ff1754a38f4dc\">\n<li class=\"has-custom-int-link-p-sort-1-color has-text-color has-link-color wp-elements-25251ce6f11bb9a7879de3c048d25810\"><a href=\"https:\/\/jegharkraeft.dk\/en\/omega-3\/\">Omega 3<\/a><\/li>\n\n\n\n<li class=\"has-custom-her-st-r-du-color has-text-color has-link-color wp-elements-2aceca396b3e40180ca049c74f48dd06\"><a href=\"#grape-seed-extract\">OPC\/ Grape seed extract (scroll down)<\/a><\/li>\n\n\n\n<li class=\"has-custom-int-link-p-sort-1-color has-text-color has-link-color wp-elements-3f8a6641d2ad37d3d0fe4377b3bdca93\"><a href=\"https:\/\/jegharkraeft.dk\/en\/oregano-oil\/\">Oregano oil<\/a><\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt8.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved et gr\u00f8nt pilleglas fra Swanson med p\u00e5skriften Grape Seed, Antioxidant support.\" class=\"wp-image-35897\" style=\"aspect-ratio:3\/2;object-fit:cover;width:550px\"\/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-style-default has-global-padding is-layout-constrained wp-container-core-group-is-layout-b040ace0 wp-block-group-is-layout-constrained has-background\" style=\"margin-top:0;margin-bottom:0;padding-top:var(--wp--preset--spacing--60);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--60);padding-left:var(--wp--preset--spacing--20);background-image:url(&apos;https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt8.jpg&apos;);background-position:44% 36%;background-size:cover;\">\n<div class=\"gb-element-906497af\">\n<h1 class=\"wp-block-heading\" id=\"grape-seed-extract\"><span class=\"ez-toc-section\" id=\"Grape_seed_extract_OPC_and_cancer\"><\/span>Grape seed extract\/ OPC and cancer<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-custom-sort-tekst-color has-alpha-channel-opacity has-custom-sort-tekst-background-color has-background\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">Summary of Grape seed extract<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Effect:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The active substances in grape seed extract\/OPC (Oligomeric Proanthocyanidins), especially proanthocyanidins, function as strong antioxidants. They can protect the body&#8217;s cells from damage and counteract inflammation.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Potential in cancer:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Laboratory studies show that the extract can cause cancer cells to self-destruct, slow their growth, and prevent them from forming the blood vessels they need to grow. It may also be able to make chemotherapy more effective.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Main limitation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Most promising results come from laboratory and animal studies. There is still a lack of larger studies on humans to confirm the effect and safety as a complementary cancer treatment.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-custom-sort-tekst-color has-alpha-channel-opacity has-custom-sort-tekst-background-color has-background\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_grape_seed_extract\"><\/span>What is grape seed extract<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-thumbnail is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt6-150x150.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved en klase bl\u00e5 druer p\u00e5 en gren med visne blade som baggrund.\" class=\"wp-image-22615\" style=\"width:auto;height:150px\" srcset=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt6-150x150.jpg 150w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt6-300x300.jpg 300w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt6-100x100.jpg 100w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt6-600x600.jpg 600w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt6.jpg 704w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Grape seed extract is a dietary supplement made from the seeds of grapes (<em>Vitis vinifera<\/em>), which is a byproduct of wine production. The extract is a rich source of a group of plant substances called polyphenols, especially proanthocyanidins, which in everyday language and marketing are often referred to as OPC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These substances are powerful antioxidants that are believed to have a number of health-promoting properties. OPC (Oligomeric Proanthocyanidins) is the primary active compound targeted, regardless of whether you buy grape seed extract or the related product made from French maritime pine bark (<a href=\"https:\/\/jegharkraeft.dk\/en\/pycnogenol\/\" target=\"_blank\" rel=\"noreferrer noopener\">Pycnogenol<\/a>). However, grape seeds are often the most economical source of high doses of OPC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In relation to cancer, it is especially these OPC compounds that attract attention. Research points to these active substances being able to affect cancer cell development at multiple levels, including inhibiting their growth, inducing cell death, and counteracting the formation of new blood vessels that tumors need to grow.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">History<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The use of grapes for medicinal purposes can be traced back thousands of years in both European and Asian cultures, where different parts of the plant were used to treat a range of ailments.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The extraction and use of extract from the seeds, however, is of more recent date. Previously, the seeds were often discarded during wine production. It was not until the 20th century that researchers seriously began to investigate the health potential hidden in the small seeds, which led to the development of the concentrated extracts found today.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mechanisms_of_action\"><\/span>Mechanisms of action<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-thumbnail is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt4-1-150x150.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved gr\u00f8nne druer i en klase, der h\u00e6nger p\u00e5 grenen.\" class=\"wp-image-23713\" style=\"width:auto;height:150px\" srcset=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt4-1-150x150.jpg 150w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt4-1-300x300.jpg 300w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt4-1-100x100.jpg 100w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Grape seed extract exerts its potential effect against cancer through a complex interplay of several biochemical processes. The active substances, primarily OPC, work at the cellular level to counteract the mechanisms that drive cancer development.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Induction of apoptosis<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most well-documented mechanisms of action is the ability to induce apoptosis, which is the body&#8217;s natural process for programmed cell death.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cancer cells are characterized by evading this process and dividing uncontrollably.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Studies show that proanthocyanidins can activate signaling pathways inside cancer cells that restart this suicide process. This happens, among other things, by upregulating proteins such as p53 and Bax, which promote cell death, and downregulating proteins that protect the cell from apoptosis [2].<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This mechanism causes the extract to be able to make cancer cells self-destruct without damaging the surrounding healthy cells.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Inhibition of angiogenesis<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">For a tumor to grow and spread, it depends on forming new blood vessels, a process called angiogenesis. These blood vessels supply the tumor with oxygen and nutrients.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Grape seed extract has been shown to be able to effectively inhibit this process. This happens by blocking the activity of growth factors such as VEGF (Vascular Endothelial Growth Factor), which are crucial for the formation of new blood vessels [3].<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By inhibiting the VEGF signaling pathway, the extract can &#8220;starve&#8221; the tumor and thus limit its growth and potential to spread.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Antioxidant and anti-inflammatory effect<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Chronic inflammation and oxidative stress (an imbalance between free radicals and antioxidants in the body) are known driving forces behind the development of cancer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Grape seed extract is a very potent antioxidant that neutralizes harmful free radicals and protects the cells&#8217; DNA from damage that can lead to mutations and cancer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At the same time, the extract has strong anti-inflammatory properties. It can dampen the body&#8217;s inflammatory response by inhibiting the production of inflammation-promoting substances, which creates a less favorable environment for cancer cell growth [5, 6].<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Regulation of cell cycle<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Cancer cells have a defective cell cycle that causes them to divide uncontrollably. Research has shown that grape seed extract can intervene in this process. It can cause a so-called &#8220;cell cycle arrest,&#8221; where the cancer cell is forced to stop its division.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This gives the cell time to either repair any DNA damage or, if the damage is too great, to undergo apoptosis [2].<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Potential_in_cancer\"><\/span>Potential in cancer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-thumbnail is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt18-150x150.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved nogle gr\u00f8nne dna-strenge og noget lagdelt v\u00e6v med gr\u00f8nne halvcirkler \u00f8verst. Disse er angrebet af r\u00f8de cirkler. M\u00f8rk baggrund.\" class=\"wp-image-23726\" style=\"width:auto;height:150px\" srcset=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt18-150x150.jpg 150w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt18-300x300.jpg 300w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt18-100x100.jpg 100w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt18-600x600.jpg 600w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt18-768x768.jpg 768w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt18.jpg 1024w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Preclinical studies, both in vitro (in test tubes\/petri dishes) and in vivo (in living organisms), have shown that grape seed extract has potential against a wide range of cancer types.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The results indicate that the extract can not only inhibit the growth of cancer cells but also make them more sensitive to conventional treatment.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Specific cancer types<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Research has investigated the effect of grape seed extract on cell lines from, among others, breast, prostate, colon, lung, and skin cancer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In many of these studies, the extract has shown an ability to selectively attack the cancer cells while leaving the healthy cells unaffected.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A specific substance in the extract, known as B2G2, has been shown to be particularly effective at killing prostate cancer cells [1].<\/li>\n\n\n\n<li>For colon cancer, studies have shown that the extract can enhance the effect of chemotherapy such as 5-fluorouracil (5-FU) and simultaneously reduce the treatment&#8217;s harmful side effects on the intestines [4].<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Synergy with chemotherapy<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most promising aspects of grape seed extract is its potential to work in synergy with chemotherapy. Studies have indicated that the extract can make cancer cells more susceptible to chemotherapeutic agents, which potentially can increase the treatment&#8217;s effectiveness.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At the same time, research suggests that the extract&#8217;s protective properties can reduce some of the damage that chemotherapy causes to healthy tissue, such as inflammation in the digestive system. This can lead to fewer side effects and a better quality of life during treatment [4].<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Benefits_of_grape_seed_extract\"><\/span>Benefits of grape seed extract<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-thumbnail is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt16-150x150.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved en lys terning og nogle symboler omkring denne. M\u00f8rk baggrund.\" class=\"wp-image-23724\" style=\"width:auto;height:150px\" srcset=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt16-150x150.jpg 150w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt16-300x300.jpg 300w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt16-100x100.jpg 100w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt16-600x600.jpg 600w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt16-768x768.jpg 768w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt16.jpg 1024w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In addition to the direct mechanisms of action against cancer cells, grape seed extract offers several general health benefits that can be relevant in a cancer treatment course.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">General cell protection<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The strong antioxidant capacity in grape seed extract contributes to protecting the body&#8217;s healthy cells from the oxidative stress that both the disease and its treatment can cause.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This protection of the cells&#8217; DNA, proteins, and fats can strengthen the body&#8217;s general resistance.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Support for the cardiovascular system<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Cancer treatment can be a burden on the heart and blood vessels. Grape seed extract is known for its positive effects on cardiovascular health.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It can help maintain healthy blood vessels, improve blood circulation, and regulate blood pressure, which are factors that can support the general physical condition during a demanding treatment course.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Disadvantages_and_limitations\"><\/span>Disadvantages and limitations<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-thumbnail is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt13-150x150.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved et medicinsk kors i bl\u00e5 neon med en rosa cirkel i centret. En r\u00f8d advarselstrekant i toppen. M\u00f8rk baggrund.\" class=\"wp-image-23721\" style=\"width:auto;height:150px\" srcset=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt13-150x150.jpg 150w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt13-300x300.jpg 300w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt13-100x100.jpg 100w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt13-600x600.jpg 600w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt13-768x768.jpg 768w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt13.jpg 1024w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Although the research is promising, it is important to acknowledge the limitations of the current knowledge about grape seed extract as a complementary cancer treatment.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Lack of human studies<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The majority of the existing research is based on laboratory and animal studies. Although these results are encouraging, they cannot be directly transferred to humans.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is a need for more and larger clinical studies on cancer patients to establish the extract&#8217;s real effect, optimal dosing, and safety in a treatment context.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Varying product quality<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The quality and concentration of the active substances, especially proanthocyanidins, can vary significantly between different products on the market. This can make it difficult to achieve a consistent and therapeutically relevant dose.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Clinical_studies\"><\/span>Clinical studies<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-thumbnail is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt14-150x150.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved En lup over nogle celler og teksten Kliniske Studier. M\u00f8rk baggrund.\" class=\"wp-image-23722\" style=\"width:auto;height:150px\" srcset=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt14-150x150.jpg 150w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt14-300x300.jpg 300w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt14-100x100.jpg 100w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt14-600x600.jpg 600w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt14-768x768.jpg 768w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt14.jpg 1024w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A limited number of clinical studies with grape seed extract have been conducted on humans, and only a few of them have specifically focused on cancer patients.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Phase I study investigated the safety of an extract from muscadine grapes (a grape variety with high polyphenol content) in patients with advanced cancer.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The study concluded that the extract was generally well-tolerated, but it was not designed to measure a direct effect on the cancer disease [5].<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Other studies have primarily focused on the extract&#8217;s effect on cardiovascular health or as an antioxidant.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is thus a great need for further clinical research that specifically investigates grape seed extract&#8217;s role as a complementary treatment in cancer patients.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Safety\"><\/span>Safety<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-thumbnail is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt9-150x150.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved nogle bl\u00e5 druer samlet i en klar kvadratisk beholder. Dette er placeret i et laboratorie med en kittelkl\u00e6dt der noterer noget. Bag dette en lystavle med figurer og formler.\" class=\"wp-image-23717\" style=\"width:auto;height:150px\" srcset=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt9-150x150.jpg 150w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt9-300x300.jpg 300w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt9-100x100.jpg 100w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt9-600x600.jpg 600w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt9-768x768.jpg 768w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt9.jpg 1024w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Grape seed extract is generally considered a safe dietary supplement for most adults when taken in moderate amounts. Side effects are rare and typically mild, but may include headache, dizziness, nausea, and stomach discomfort.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">People taking blood-thinning medications (e.g., warfarin) or antiplatelet medications (e.g., clopidogrel) should exercise caution, as grape seed extract may potentially increase the risk of bleeding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It is always advisable to talk to your healthcare provider before starting a new dietary supplement, especially during an active cancer treatment, to avoid unwanted interactions with conventional treatment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dispensing_and_use\"><\/span>Dispensing and use<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-thumbnail is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt11-150x150.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved en \u00e6ske med kapsler, et glas med pulver en ske med pulver og en h\u00e5nd der r\u00e6kker en kapsel frem.\" class=\"wp-image-23719\" style=\"width:auto;height:150px\" srcset=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt11-150x150.jpg 150w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt11-300x300.jpg 300w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt11-100x100.jpg 100w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt11-600x600.jpg 600w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt11-768x768.jpg 768w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt11.jpg 1024w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Grape seed extract is typically found in capsule or tablet form.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Since there is no established standard dosage for complementary treatment of cancer, recommendations can vary.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>General dosage<\/strong>: There is no official standard dosage. In clinical studies and protocols, high, pharmacological doses are used, which vary greatly, often from 1 to 8 grams daily, and in some cancer trials up to 12 grams daily [12].\n<ul class=\"wp-block-list\">\n<li>The dose is typically taken divided into 2-3 times during the day.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Standardization<\/strong>: It is recommended to choose a product that is standardized to contain a specific amount of proanthocyanidins (often indicated as a percentage, e.g., 95%), as these are the substances believed to have the primary effect.<\/li>\n\n\n\n<li><strong>Intake<\/strong>: The capsules can be taken with or without food. Taking them with a meal may for some reduce the risk of stomach discomfort.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-thumbnail is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt21-150x150.jpg\" alt=\"Vindruekerneekstrakt symboliseret ved en klase bl\u00e5 druer, en sk\u00e5l med pulver, kapsler og en vinmark i baggrunden.\" class=\"wp-image-23729\" style=\"width:auto;height:150px\" srcset=\"https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt21-150x150.jpg 150w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt21-300x300.jpg 300w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt21-100x100.jpg 100w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt21-600x597.jpg 600w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt21-768x764.jpg 768w, https:\/\/jegharkraeft.dk\/wp-content\/uploads\/2025\/10\/Vindruekerneekstrakt21.jpg 843w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Grape seed extract appears as an interesting natural supplement in connection with cancer treatment, primarily due to its high content of proanthocyanidins.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Preclinical research has shown that the extract possesses several relevant properties, including the ability to induce cell death in cancer cells, inhibit the formation of blood vessels to tumors, and counteract inflammation and oxidative stress.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The potential to enhance the effect of chemotherapy and simultaneously protect healthy cells is particularly noteworthy. However, it is crucial to emphasize that the current knowledge is primarily derived from laboratory and animal studies. Therefore, there is an urgent need for more clinical studies on humans to be able to validate these findings and establish a clear role for grape seed extract as part of an integrated cancer treatment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also see <a href=\"https:\/\/jegharkraeft.dk\/en\/medication-logistics\/\" target=\"_blank\" rel=\"noreferrer noopener\">Medicine Logistics<\/a> (Especially the schedule for use)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also see <a href=\"https:\/\/jegharkraeft.dk\/en\/resveratrol\/\" target=\"_blank\" rel=\"noreferrer noopener\">Resveratrol<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"grape-seed-extract\">Back to <a href=\"https:\/\/jegharkraeft.dk\/en\/supplements-alphabetically\/\" target=\"_blank\" rel=\"noreferrer noopener\">Supplements<\/a><\/p>\n\n\n\n<p class=\"has-custom-menu-links-color has-text-color has-link-color wp-elements-9190cfe395c28e4d2ec89873338ddaa5 wp-block-paragraph\"><a href=\"#menu\">(to menu)<\/a><a href=\"https:\/\/jegharkraeft.dk\/en\/supplements-alphabetically\/\"><\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Links<\/h4>\n\n\n\n<p class=\"has-custom-sort-tekst-color has-text-color has-link-color wp-elements-3bb757ea1da37e8db6619d8a4a514fde wp-block-paragraph\">[1] <a href=\"https:\/\/videnskab.dk\/om-videnskabdk\/forskere-draeber-kraeftceller-med-vindruekerner\/\" target=\"_blank\" rel=\"noreferrer noopener\">Forskere dr\u00e6ber kr\u00e6ftceller med vindruekerner<\/a> (Videnskab.dk, 2013) <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Content: The article describes how American researchers have identified and synthetically produced the substance B2G2 from grape seed extract, which specifically kills prostate cancer cells without harming healthy cells. (Danish Language)<\/li>\n<\/ul>\n\n\n\n<p class=\"has-custom-sort-tekst-color has-text-color has-link-color wp-elements-f059b60bdb8feb0d0bfc2b654dcbad69 wp-block-paragraph\">[2] <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/33260632\/\" target=\"_blank\" rel=\"noreferrer noopener\">Grape Seed Proanthocyanidins Induce Apoptosis and Cell Cycle Arrest of HepG2 Cells Accompanied by Induction of the MAPK Pathway and NAG-1<\/a> (PubMed, 2020) <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Content: In vitro study showing how proanthocyanidins from grape seeds inhibit the growth of liver cancer cells by inducing programmed cell death (apoptosis) and stopping cell division.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-custom-sort-tekst-color has-text-color has-link-color wp-elements-62a3858d97da85da1f7ffaf739ca9efe wp-block-paragraph\">[3] <a href=\"https:\/\/aacrjournals.org\/cancerpreventionresearch\/article\/1\/7\/554\/46428\/Grape-Seed-Extract-Inhibits-Angiogenesis-via\" target=\"_blank\" rel=\"noreferrer noopener\">Grape Seed Extract Inhibits Angiogenesis via Suppression of the Vascular Endothelial Growth Factor Receptor Signaling Pathway<\/a> (AACR Journals, Cancer Prevention Research, 2008) <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Content: In vitro research showing that grape seed extract can inhibit the formation of new blood vessels (angiogenesis) that tumors depend on to grow, by blocking the VEGF signaling pathway.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-custom-sort-tekst-color has-text-color has-link-color wp-elements-3c2eef8c544b863b3ed7551752a0f8d1 wp-block-paragraph\">[4] <a href=\"https:\/\/themossreport.com\/grape-seed-extract\/\" target=\"_blank\" rel=\"noreferrer noopener\">Grape Seed Extract &#8211; The Moss Report<\/a> (The Moss Report, Date not specified) <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Content: A report summarizing studies showing that grape seed extract can enhance the effect of chemotherapy (such as 5-FU) against colon cancer and simultaneously reduce the treatment&#8217;s side effects.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-custom-sort-tekst-color has-text-color has-link-color wp-elements-e0f3b1fd1e34b2fba78ba3a750d7a248 wp-block-paragraph\">[5] <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/33867481\/\" target=\"_blank\" rel=\"noreferrer noopener\">Phase I Study of Muscadine Grape Extract for Patients with Advanced Cancer<\/a> (PMC, NIH, 2021) <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Content: Phase I clinical study investigating the safety and tolerability of an extract from muscadine grapes in patients with advanced cancer.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-custom-sort-tekst-color has-text-color has-link-color wp-elements-ae7d23333c4da190e7beda0efead893e wp-block-paragraph\">[6] <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/36692807\/\" target=\"_blank\" rel=\"noreferrer noopener\">Grape Seed Components as Protectors of Inflammation, DNA Damage, and Cancer<\/a> (Current Nutrition Reports, 2023) <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Content: Review study summarizing research on how substances in grape seeds can protect against inflammation, prevent DNA damage, and thus play a role in counteracting cancer.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-custom-sort-tekst-color has-text-color has-link-color wp-elements-928763300d1a567e5a300dde5572c69a wp-block-paragraph\"><strong>Page created:<\/strong> October 28, 2025, Last revised May 2, 2026<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-custom-menu-links-color\">\u2764<\/mark><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>What you read on &#8220;Jeg har Kr\u00e6ft&#8221; is not a recommendation. Seek competent guidance.<\/em><\/strong><\/p>\n<\/div>\n<\/div>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Indhold<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Dietary_Supplements_Grouped_by_Effect\" >Dietary Supplements Grouped by Effect<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Dietary_Supplements_Alphabetical\" >Dietary Supplements Alphabetical<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Grape_seed_extract_OPC_and_cancer\" >Grape seed extract\/ OPC and cancer<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#What_is_grape_seed_extract\" >What is grape seed extract<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Mechanisms_of_action\" >Mechanisms of action<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Potential_in_cancer\" >Potential in cancer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Benefits_of_grape_seed_extract\" >Benefits of grape seed extract<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Disadvantages_and_limitations\" >Disadvantages and limitations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Clinical_studies\" >Clinical studies<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Safety\" >Safety<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Dispensing_and_use\" >Dispensing and use<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/jegharkraeft.dk\/en\/opc-grape-seed-extract\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Dietary Supplements Grouped by Effect Dietary Supplements Alphabetical A,. B,. C,. D,. E+F,. G,. H,. I+J+K,. L,. M,. N,. O,. P,. Q,. R,. S,. T,. U+V+Z Grape seed extract\/ OPC and cancer Summary of Grape seed extract Effect: Potential in cancer: Main limitation: What is grape seed extract Grape seed extract is a dietary supplement [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[389,375,374],"tags":[],"class_list":["post-35907","post","type-post","status-publish","format-standard","hentry","category-supplements","category-alternative-treatments","category-treatments"],"modified_by":"Hanne Kj\u00e6r Uhlig","wpml_current_locale":"en_US","wpml_translations":[],"_links":{"self":[{"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/posts\/35907","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/comments?post=35907"}],"version-history":[{"count":2,"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/posts\/35907\/revisions"}],"predecessor-version":[{"id":35930,"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/posts\/35907\/revisions\/35930"}],"wp:attachment":[{"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/media?parent=35907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/categories?post=35907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jegharkraeft.dk\/en\/wp-json\/wp\/v2\/tags?post=35907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}