Tag: latitude

Bar chart showing vitamin D insufficiency prevalence by geography and skin type, ranging from 40% in United States to 97% in Canada
Data & NumbersExplainersPerspectivesResearch Digest

Vitamin D Insufficiency Affects Up to 97% in Some Regions—Here’s What the Evidence Shows

Vitamin D insufficiency affects 40–97% of North American populations, with geographic latitude and skin pigmentation driving significant disparities in vitamin…

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