The recommendation for most adults is between 600 and 800 IU (International Units). In some cases, even 1,000 to 2,000 IU daily is insufficient to raise Vitamin D levels to the desired range.
Nov. 6, 2024 — Children whose mothers took extra vitamin D during pregnancy continue to have stronger bones at age seven, according to ... Healthy Adults Under Age of 75 Urged to Take ...
The recommended daily allowance of vitamin D is 600 international units (IU) for people ages 1 to 70 and 800 IU for adults over 70. “However, your doctor may recommend a higher dose if you have ...