A new study published in the Journal of Clinical Endocrinology and Metabolism concluded that cancer patients who had higher levels of vitamin D when diagnosed tended to have better survival rates and remain in remission longer than patients who are deficient of vitamin D.
Researchers reviewed 25 studies that collectively examined vitamin D levels of over 17,300 cancer patients and found the above results for people with breast cancer, colorectal cancer, and lymphoma.
In most studies reviewed cancer patients had their vitamin D level measured at the time of diagnosis and were followed for survival rates. The researchers found a 10nmol/L increase in vitamin D levels was tied to a 4 percent increase in survival among the cancer patients.
The strongest link was between vitamin D and breast cancer, colorectal, and lymphoma survival. Less evidence was found for lung cancer, gastric cancer, prostate cancer, leukemia, melanoma, and Merkel cell carcinoma although the data was positive.