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Taking Recommendations to Task

Dr. Heaney explains how it was that the U.S. Preventive Services Task Force found the evidence in support of vitamin D supplementation inconclusive, while vitamin D experts find it persuasive Key Points In 2013 the...

Defining Normal – Origins and Resiliency

Dr. Heaney describes two additional physiology-based approaches to defining “normal” nutrient status – something that the currently employed phenomenological approach cannot do Key Points Nutrition policymakers lack a shared vision of “normal” and are...