Low D causes illness: Low vitamin d is associated with depression, chronic back/musculoskeletal pain, poor immune function, increased risk of heart disease, many cancers, autoimmune disease and lower life expectancy. Everyone in northern latitudes (like ma) who does not take d in fall ; winter becomes deficient. One should take 5-8000 iu/day to achieve optimal levels of 50-80. See http://bit.Ly/1ekkvkv.
Answered 6/21/2014
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