According to one older review, many experts agree that at least 1,000 IU (25 mcg) of vitamin D3 daily is needed in situations where there is no exposure to sunlight. Because vitamin D is fat ...

After that, they will take 1,000 IU D3 per day. Nursing infants and children who eat less than 1 liter of vitamin D-fortified milk a day may need to take 400 IU per day of D3. How long does it ...

So choose by price and preference of pill ... D3 levels ranged from 105 percent to 141 percent of the labeled amount in the adult and children's vitamin D-only products (1,000 international units ...

Pure Encapsulations Vitamin D3 gets our pick as the best high dose vitamin D option because it’s third-party tested and provides 10,000 IU per serving. If you have a severe vitamin D deficiency ...