Vitamin B and cancer

What is vitamin B

Vitamin B is not a single vitamin, but a group of eight water-soluble vitamins (B1, B2, B3, B5, B6, B7, B9, and B12) that play a crucial role in a number of bodily functions, including energy production, cell growth, and DNA synthesis. While a healthy and balanced diet normally provides sufficient B vitamins, cancer and cancer treatment can disrupt the body’s absorption and utilization of these vitamins, which can lead to deficiencies. Therefore, supplementation with B vitamins may be relevant for some cancer patients as part of complementary treatment.

Mechanisms of action and potential of vitamin B

B vitamins have different mechanisms of action that can be relevant for cancer patients:

B1 (Thiamine):

Energy production: Thiamine is essential for the conversion of carbohydrates into energy. Cancer cells have a high energy demand, and thiamine deficiency can inhibit their growth.
Nervous system function: Thiamine deficiency can cause nerve damage, which can be worsened by cancer treatment.

B2 (Riboflavin):

Antioxidant effect: Riboflavin functions as a cofactor for enzymes that protect cells from oxidative stress. Oxidative stress can contribute to the development of cancer and worsen the side effects of cancer treatment.
Energy production: Riboflavin is involved in energy production and can help reduce fatigue in cancer patients.

B3 (Niacin):

DNA repair: Niacin is important for DNA repair and can potentially prevent DNA damage that can lead to cancer.
Cell signaling: Niacin plays a role in cell signaling and can affect processes involved in cancer cell growth and spread.
Risk of NAD boosters: B3 is the precursor to the coenzyme NAD+. Although many cancer patients experience extreme fatigue and seek NAD boosters (such as NR or NMN) for energy, this is associated with great risk.
“Feeding” cancer cells: Cancer cells are metabolic opportunists with enormous energy needs. Newer research concludes that one should never take potent NAD boosters without close medical supervision. There is a real risk that by raising NAD levels, one may end up “feeding” the cancer cells’ energy production and thus accelerating the disease.

B5 (Pantothenic acid):

Energy production: Pantothenic acid is essential for energy production and can help reduce fatigue in cancer patients.
Hormone production: Pantothenic acid is involved in the production of hormones that can affect cancer cell growth.

B6 (Pyridoxine):

Immune function: Pyridoxine is important for a well-functioning immune system. Cancer and cancer treatment can weaken the immune system, and pyridoxine can help strengthen the immune system.
Neurotransmitter production: Pyridoxine is involved in the production of neurotransmitters that can affect mood and pain perception in cancer patients.

B7 (Biotin):

Cell growth and repair: Biotin is involved in cell growth and repair, which is important for rebuilding tissue after surgery or radiation therapy.
Gene expression: Biotin plays a role in gene expression and can affect processes involved in cancer cell growth and spread.

B9 (Folic acid):

DNA synthesis and repair: Folic acid is crucial for DNA synthesis and repair. This can be important for preventing DNA damage that can lead to cancer.
Cell division: Folic acid is necessary for cell division, but in high doses can potentially stimulate cancer cell growth.

B12 (Cobalamin):

DNA synthesis and repair: Cobalamin is crucial for DNA synthesis and repair. This can be important for preventing DNA damage that can lead to cancer.
Nervous system function: Cobalamin deficiency can cause nerve damage, which can be worsened by cancer treatment.
Red blood cell production: Cobalamin is necessary for the production of red blood cells, and deficiency can lead to anemia, which is common in cancer patients.

Overall

B vitamins play a complex role in the body, and their mechanisms of action in relation to cancer are not fully understood. They can potentially affect cancer cell growth, spread, and survival, as well as improve immune function and reduce side effects of cancer treatment. See also preclinical and clinical studies below.

Benefits of vitamin B

Benefits of vitamin B as a supplement to cancer treatment

In addition to the mechanisms of action described earlier, B vitamins can have a number of potential benefits for cancer patients:

Improved quality of life

Cancer and cancer treatment can cause fatigue and exhaustion. B vitamins, especially B1, B2, B3, B5, and B12, play a crucial role in energy production and can help increase energy levels and reduce fatigue.

Better mood and cognitive function: Some B vitamins, such as B6, B9, and B12, are important for brain function and can contribute to improving mood, concentration, and memory.

Relief of side effects: B vitamins can potentially alleviate some of the side effects of cancer treatment, such as nausea, vomiting, diarrhea, mouth sores, nerve damage, and anemia.

Potential synergistic effect

Some studies suggest that B vitamins can enhance the effect of chemotherapy and radiation therapy. This may be because B vitamins improve the cells’ ability to repair DNA damage and strengthen the immune system.

Protection against cancer

B vitamins, especially B9 (folic acid) and B12, are crucial for DNA synthesis and repair. This can be important for preventing DNA damage that can lead to cancer.

Strengthened immune function: Some B vitamins, such as B6, are important for a well-functioning immune system, which plays an important role in combating cancer cells.

Disadvantages and limitations

Although B vitamins have potential benefits for cancer patients, there are also some disadvantages and limitations:

Limited clinical evidence

There is a need for more research, including large, randomized clinical studies, to confirm the potential benefits of B vitamin supplements in cancer patients and to determine the optimal dosage and use.

Interactions with medication

B vitamins can potentially interact with certain types of medication, including chemotherapy, blood-thinning medication, and immunosuppressive medication. Therefore, it is important to consult a doctor or pharmacist before starting B vitamin supplements.

Side effects

Although B vitamins are generally well tolerated, they can cause side effects in some people, such as nausea, diarrhea, skin rash, and in rare cases nerve damage.

Not a substitute for conventional treatment

Should not be used as a substitute for chemotherapy, radiation therapy, or other conventional cancer treatment: B vitamin supplements should only be used as a supplement to conventional treatment in consultation with a competent healthcare provider.

Overdosing of certain B vitamins

Although B vitamins are water-soluble and excess amounts are normally excreted in urine, overdosing of certain B vitamins, especially B6 and B9, can be harmful. Therefore, it is important to follow the recommended dosage and not exceed it.

Potential stimulation of cancer cell growth

Although folic acid is necessary for cell division, high doses can potentially stimulate cancer cell growth. Therefore, it is important to consult a doctor before taking high doses of folic acid.

Varying needs

The need for B vitamins can vary depending on factors such as age, gender, health status, and lifestyle. Therefore, it is important to have an individual assessment of the need for B vitamin supplements.

Preclinical and clinical studies

There is limited clinical evidence for the effect of B vitamin supplements in cancer patients. Some studies suggest that B vitamin supplements can improve quality of life, reduce side effects of cancer treatment, and potentially improve survival in some cancer patients.

Too much and too little

A new case-control study from Vietnam with 3,758 cancer cases and 2,995 control subjects has examined the association between intake of B12 vitamin and cancer risk.

The results showed a U-shaped association where both low and high intake of B12 were associated with increased cancer risk.

People with low B12 intake had a 6-107% increased risk of cancer in general, especially:

Esophageal cancer
Lung cancer
Breast cancer

Conversely, people with high B12 intake had a 20-52% increased risk, especially for stomach cancer.

The conclusion is that both too low and too high intake of B12 vitamin can increase the risk of cancer in the Vietnamese population.

However, more research is needed to confirm these findings and determine the optimal dosage and use of B vitamins in cancer treatment.

Dispensing and intake

B vitamins are found in various forms, including:

Dietary supplements: Available in tablet, capsule, and liquid form.
Fortified foods: Some foods, such as breakfast products and bread, are fortified with B vitamins.
Natural sources: B vitamins are naturally found in a number of foods, such as meat, fish, eggs, dairy products, legumes, nuts, and green vegetables.

Dosage

The dosage varies depending on the specific use and product. It is important to follow the recommendations on the product and consult a qualified healthcare provider before starting B vitamin supplements, especially if you are taking other medication or have a chronic illness.

Interactions and optimized absorption (Metformin, Propranolol, etc.)

For cancer patients who follow alternative or metabolic protocols, it is crucial to know that several of the most commonly used drugs inhibit the body’s ability to absorb and utilize B vitamins – especially B12 vitamin. Therefore, a special approach is required for how to take these supplements:

Metformin and B12: Metformin is often used to block cancer cells’ access to glucose, but it inhibits the physical absorption of B12 vitamin in the small intestine by interfering with the calcium-dependent receptors. Long-term use can lead to deficiency, which can cause nerve damage or worsen chemo-induced neuropathy.
- Solution: Use B12 lozenges that dissolve under the tongue (sublingual). Since the vitamin is absorbed directly through the oral mucous membranes into the bloodstream, the intestinal blockage is completely bypassed. This ensures optimal absorption, regardless of whether one takes Metformin or acid-neutralizing medication (PPI (see below)).
Propranolol, chemo, and B1: Propranolol is used in some protocols to inhibit the stimulating effect of stress hormones on cancer cells. This beta-blocker, as well as certain types of chemotherapy, can however deplete the body’s stores of B1 (Thiamine), which is critical for the cells’ energy production and nervous system. .
- Solution: Since B1 is not available as a lozenge (due to poor sublingual absorption and a very bitter taste), one should here ensure intake through the diet or via Benfotiamine capsules. Benfotiamine is a fat-soluble form of B1 that is absorbed much more effectively than regular Thiamine and helps restore the cells’ levels.
Acid-neutralizing medication (PPI): Medication against stomach acid (Omeprazole, Pantoprazole, etc.) prevents the release of B12 from food. Again, lozenges under the tongue are the most effective method to ensure that the body gets the necessary vitamin.

Conclusion

B vitamins play an important role in a number of bodily functions that can be compromised in cancer patients.

B vitamin supplements can have potential benefits for cancer patients, but it is important to be aware of both advantages and disadvantages. B vitamin supplementation should always be done in consultation with a competent healthcare provider, who can assess the need for supplementation and ensure that it does not interact with other medication.

There is a need for more research to confirm the potential benefits and determine the optimal dosage and use of B vitamins in cancer treatment.

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