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Side effects of vitamin D supplements When taken in the appropriate dosage as directed by a doctor, vitamin D supplements are generally safe. However, taking too much vitamin D can cause side ...
The Institute of Medicine in 2010 recommended a maximum uptake of vitamin D of 4000 IU/d, finding that the dose for lowest observed adverse effect level is 40,000 IU daily for at least 12 weeks, [25] and that there was a single case of toxicity above 10 000 IU after more than seven years of daily intake; this case of toxicity occurred in ...
There's lots of confusion around the difference between vitamin D2 and vitamin D3, and which is best for whom. Doctors and experts explain.
It is rare, having occurred historically during a time of unregulated fortification of foods, especially those provided to infants, [4]: 431–432 or in more recently, with consumption of high-dose vitamin D dietary supplements following inappropriate prescribing, non-prescribed consumption of high-dose, over-the-counter preparations, or ...
Vitamin D3, aka cholecalciferol, is important for bone health and immune function. Experts discuss benefits, sources, risks and who needs a supplement.
The US Recommended Dietary Allowance for niacin for adult women is 14 mg/day and for adult men 16 mg/day. Niacin is available as a prescription product, either immediate release (500 mg tablets; prescribed up to 3,000 mg/day) or extended release (500 and 1,000 mg tablets; prescribed up to 2,000 mg/day).