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The tolerable upper intake level (UL) in adults is 100 µg (4000 international units) daily for healthy adults and children 9 to 18 years per the Institute of Medicine. While infrequent, vitamin D intoxication does occur, most often due to mega doses of vitamin D seen in certain fad diets or in those taking vitamin D replacement therapy.
Vitamin D (also referred to as calciferol) is a fat-soluble vitamin that is naturally present in a few foods, added to others, and available as a dietary supplement. It is also produced endogenously when ultraviolet (UV) rays from sunlight strike the skin and trigger vitamin D synthesis.
The charge to the committee (Institute of Medicine Committee to Review Dietary Reference Intakes for Vitamin D and Calcium) was to assess current relevant data and update, as appropriate, the DRIs (Dietary Reference Intakes) for vitamin D and calcium.
Intact dilation and extraction (D&X, IDX, or intact D&E) is a surgical procedure that terminates and removes an intact fetus from the uterus. The procedure is used both after miscarriages and for abortions in the second and third trimesters of pregnancy .
NIH Virtual Tour: National Library of Medicine. NLM is the world's largest biomedical library and a national resource for health professionals, scientists, and the public.
21 Οκτ 2024 · With their election, NAM members make a commitment to volunteer their service in National Academies activities. Newly elected regular members of the National Academy of Medicine and their election citations are: Toyin Ajayi, MD, MPhil, chief executive officer, Cityblock Health, Brooklyn, N.Y.
