800 IU (20 mcg) per day increases vitamin D blood levels 8 ng/ml (20 nmol/L). 1000 IU (25 mcg) per day increases vitamin D blood levels 10 ng/ml (25 nmol/L). 2000 IU (50 mcg) per day increases ...

The NIH notes that symptoms of vitamin D toxicity are most likely to appear when a person’s daily intake is at least 10,000 IU (250 mcg). However, experts have cautioned that much smaller ...

If you want a vitamin D supplement that supports your child’s bone, teeth, and immune health, Zahler Junior D3 Vitamins 1000 IU is a great option. We have been using Zahler Junior D3 Vitamins ...