What is the recommended amount of Vitamin D per day?

• A. 200-400 IU per day
• B. 400-1000 IU per day
• C. 1000-2000 IU per day
• D. 50-150 IU per day

Answer: (B)

Vitamin D needs for bone health are met with a daily intake in the range of roughly 600–800 IU for most adults. The range 400–1000 IU per day best reflects this general guidance, since it covers the commonly recommended amount without going much higher than needed for typical daily use. The lower ranges tend to be insufficient for most adults, while the higher range exceeds standard daily recommendations unless there’s a specific medical reason or a deficiency being treated. Sun exposure and fortified foods contribute, but supplementation in this middle range is a practical way to ensure adequate vitamin D for most people.