Vitamin D3 and Cancer 

Scientific studies have shown that a daily supplement of 1000 IU of vitamin D3 may significantly reduce the risk of various cancers, including breast cancer, ovarian cancer and colon cancer.

Research has concluded that there is a protective relationship between sufficient vitamin D status and a decreased risk of cancer.

In one placebo controlled trial a daily supplement of 25 µg (1000 IU) of vitamin D3 significantly reduced the risk of various cancers by 77%. ⁽¹⁾

Research indicates that by optimising and maintaining serum 25(OH)D level to 40 to 60 ng/mL (100-150 nmol/L) would prevent approximately 58,000 new cases of breast cancer and 49,000 new cases of colorectal cancer each year and reduce case-fatality rates of patients who have breast, colorectal, or prostate cancer by 50%. ⁽²⁾

Breast Cancer

Clinical trials have demonstrated a favourable association of vitamin D with an increased risk of breast cancer. ^(3-11)

Recent research has found that if vitamin D blood levels were maintained at a level of approximately 52 ng/mL, the risk of breast cancer would be reduced by 50%. ⁽¹²⁾

Colon Cancer

Extensive clinical trials have demonstrated a statistically significant benefit of vitamin D on the risk of colon cancer and mortality rates. ^{(13)(3)(14)(7)(16-24)}

Serum levels below 30ng/mL are associated with significant increased risk of colon cancer. ^(14)(25)(26)

Lung Cancer

Research has concluded that optimal vitamin D status significantly reduces the risk of fatalities in lung cancer patients.

New research presented at the 100th Annual Meeting of the American Association for Cancer Research reveals that lung cancer cells make an enzyme (CYP24) that counteracts the positive effects of vitamin D, which in high levels helps the body make proteins that work against cancer.

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