Vitamin D keeps popping up in all kinds of research. Evidence seems to be growing for its extensive role in health, cancer prevention and even mental health and mood.
Deficiency may even be a contributing factor for the greater prevalence of heart disease and diabetes among African-Americans (dark skinned peoples have much more difficulty synthesising vitamin D from sunlight). Nearly 100% African Americans have insufficient Vitamin D. Nearly 1 in 3 are severely deficient. (study)
DESIGN & RESEARCH: DAVID MCCANDLESS