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Plain-English science on vitamin D, deficiency, testing methods, and what your number actually means.

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Vitamin D for athletes: muscle, recovery, and performance Muscle
May 14, 2026

Vitamin D for athletes: muscle, recovery, and performance

Vitamin D affects muscle strength, recovery rate, injury risk, and aerobic capacity — yet up to 60% of elite athletes are deficient in winter. Here's what...

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