One size doesn't fit all for vitamin D and men: African-American men in northern regions especially need high doses of supplements

African-American men living in areas with low sunlight are up to 3.5 times more likely to have vitamin D deficiency than Caucasian men and should take high levels of Vitamin D supplements, reports a new study. The current general recommendation of 600 international units is way too low for all men in northern regions. Low Vitamin D has been linked to prostate cancer, diabetes, rheumatoid arthritis and multiple sclerosis.

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