Vitamin D

Vitamin D is a hormone created by the body when skin is exposed to ultraviolet rays in sunlight. It is found naturally in a small number of foods and can also be taken as a fat soluble dietary supplement.

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Vitamin C: Oral Use

Vitamin C, available in several foods and dietary supplements, shows some anticancer effects, including better survival among people with breast cancer.

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Reishi Mushroom

Reishi mushroom is a natural product that may enhance immunity and response to chemo/radiotherapy, improve quality of life, and manage some side effects. 

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Non-aspirin Nonsteroidal Anti-inflammatory Drugs (NSAIDs)

Nonsteroidal anti-inflammatory drugs (NSAIDs) are used to reduce inflammation, with notable benefits in increasing survival and reducing risk of several types of cancer; expert consensus is that the risks of harm from using these drugs long-term for prevention are greater than the benefits for many people.

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Modified Citrus Pectin

Modified citrus pectin is a plant-based dietary supplement with very preliminary evidence of anticancer and antimetastatic effects.

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Metformin

Metformin, used to manage diabetes, shows some benefits in lower risks of cancer and better survival, mostly among people with diabetes or high blood sugar.

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Melatonin

Melatonin supplements mimic the effects of your own naturally produced melatonin in promoting sleep, and research shows melatonin can have a substantial role in cancer outcomes and side effects.

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Mediterranean Diet

A Mediterranean diet is high in vegetables, fruits, whole grains, and olive oil and low in meat, sweets, and saturated fat. It is linked to lower risks of cancer and relief of some symptoms and imbalances common among people with cancer.

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Low-dose Naltrexone

This prescription drug is used off-label in low doses to treat people with cancer, with notable but very preliminary successes in cases where the cancers were difficult-to-treat or quite advanced.

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Flaxseed

This food and dietary supplement may reduce prostate cancer spread, improve survival in breast cancer, and lower the risk of several cancers.

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