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Vitamin D Supplements — Your Winter Supplement Prep: Vitamin D and Immune Season
Skin synthesis of vitamin D drops in winter. A 2017 meta-analysis found fewer respiratory infections with supplements, mostly in people who started deficient.
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Supplements for Weight Loss: What the Science Supports
NIH reviewers found no supplement proven effective for weight loss, with one qualified exception for green tea catechins. What the evidence and the risks look like.
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Strength Training for Beginners — Beginner Strength Training: Your First Eight Weeks
A plain roadmap for the first eight weeks of strength training, built on basic movements, small load steps, and the CDC activity floors for adults.