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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
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Nitrate supplementation for endurance: what the sources support
Beet juice, beetroot powder and sodium nitrate all deliver the same ion. The evidence for endurance gains is real but narrower than the marketing suggests.
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Caffeine timing for strength training: what the evidence supports
How long before a lift to take caffeine, why the answer varies so much between people, and what the pharmacology actually shows.
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Supplements that actually work: what the evidence supports
Most pills in the cabinet have thin evidence behind them. A few do not, and the difference matters.
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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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Nutrition for kids: feeding picky eaters without the battles
Balanced snacks, realistic portions and less mealtime stress, built from what pediatric nutrition guidance actually says.