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 ...
Many over-the-counter vitamin D supplements range from 25 to 125 mcg (1,000 to 5,000 IU). You shouldn't take more than 100 mcg (4,000 IU) of vitamin D in a day unless a doctor recommends you do so ...
Breastfed infants and children with certain medical conditions are also susceptible to vitamin D deficiency. If a healthcare professional has recommended a vitamin D supplement for calcium ...
Keep in mind this includes all calcium combined from diet and supplements: Adults 19 to 50 years: 1,000 mg ... amounts of vitamin D: Age 19 to 70: 15 micrograms (mcg) or 600 international units ...
These people may find themselves at risk of vitamin D deficiency, including: Children and teenagers: 600 international units (IU) or 15 micrograms (mcg). Adults up to the age of 70 years old ...