Tolerable upper intake level for selected nutrients for adults


Tolerable upper intake level for selected nutrients for adults

Table
Tolerable upper intake level (UL) for selected nutrients for adults
nutrient UL per day
calcium 2,500 milligrams
copper 10 milligrams
fluoride 10 milligrams
folic acid* 1,000 micrograms
iodine 1,100 micrograms
iron 45 milligrams
magnesium** 350 milligrams
manganese 11 milligrams
niacin* 35 milligrams
phosphorus 4 grams
selenium 400 micrograms
vitamin A*** 3,000 micrograms (10,000 IU)
vitamin B6 100 milligrams
vitamin C 2,000 milligrams
vitamin D 50 micrograms (2,000 IU)
vitamin E* 1,000 milligrams
zinc 40 milligrams
*The UL for vitamin E, niacin, and folic acid applies to synthetic forms obtained from supplements or fortified foods.
**The UL for magnesium represents intake from a pharmacological agent only and does not include food or supplements.
***As preformed vitamin A only (does not include beta-carotene).
Source: National Academy of Sciences, Dietary Reference Intakes (1997, 1998, 2000, 2001, and 2002).
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Universalium. 2010.

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