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Dose Response for Omega-3 Supplementation

Percent Change in Omega-3 Index by Supplement Amount Individual responses vary greatly with supplementation – that is why you need to test! For example, from a study of 115 people (N=115), those taking 1800 mg...

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Vitamin D Deficiency and Race

Does your skin color affect your chance of vitamin D deficiency? Data from the National Health and Nutrition Examination Survey (NHANES) III shows that non-Hispanic blacks are at more than 10 times greater risk...

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Serum Level vs Intake (Ages 18+ years)

Why check your vitamin D serum levels? In an analysis of vitamin D serum levels and daily supplemental vitamin D intake amounts for 7324 D*action participants, we found that while average serum level rises...

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Moving Research into Practice Charts Booklet

Moving Research into Practice Charts Booklet This booklet contains charts based on data collected in the GrassrootsHealth study as well as several studies by our scientists and other vitamin D researchers.  It is a...