Nutrition
Vitamin D Sun Exposure
Vitamin D sun exposure synthesizes cholecalciferol in skin when UVB reaches arms and legs—latitude, season, skin tone, sunscreen, and time of day all change yield. Brief, safe midday windows beat endless cloudy commutes for status.
Vitamin D sun exposure synthesizes cholecalciferol in skin when UVB reaches arms and legs—latitude, season, skin tone, sunscreen, and time of day all change yield. Brief, safe midday windows beat endless cloudy commutes for status.
Food and supplements backfill when blood levels lag.
Related terms
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