Vitamin D
Also known as: D
Vitamin D is an essential nutrient required for calcium absorption and bone health. As a fortificant, it is permitted at levels established under FDA regulations and dietary reference intakes from the NIH Office of Dietary Supplements.
What it is
Fat-soluble vitamin (D2 ergocalciferol or D3 cholecalciferol) essential for calcium absorption and bone health.
Nutrient fortificant added to milk, plant beverages, cereals, and other foods.
Why it's flagged
- risk of toxicity only at intakes far above the Tolerable Upper Intake Level (4,000 IU/day adults)
What regulators actually say
"Vitamin D... is a fat-soluble vitamin that is naturally present in a few foods, added to others, and available as a dietary supplement."
Regulatory status
United States — FDA
Permitted as a nutrient supplement; food fortification levels established in 21 CFR 184.1950.
European Union — EFSA
Permitted; Dietary Reference Values established by EFSA.
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