Nutrition
Vitamin D Status
Vitamin D status tracks sun, diet, and supplement sufficiency for bone and immune health. Test-guided correction beats guessing high doses.
Vitamin D status reflects blood 25(OH)D from sun, food, and supplements—linked to bone health, immune function, and possibly mood and performance in deficiency. Indoor lifestyles and high latitudes often run low; blind megadosing risks toxicity.
Test when clinically indicated, correct with D3 and safe sun, and pair with adequate calcium and resistance training.
Common questions
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Should athletes test vitamin D?
Testing is reasonable if you are indoors year-round, dark-skinned at high latitude, or symptomatic. Use results with a clinician—do not mega-dose without labs.
Related terms
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