How Much Vitamin D Should You Take For Optimal Health?

How Much Vitamin D Should You Take For Optimal Health? Vitamin D recommended intake is at 400–800 IU/day or 10–20 micrograms. However, some studies suggest that a higher daily intake of 1,000–4,000 IU (25–100 micrograms) is needed to maintain optimal blood levels. How much vitamin D can you safely take every day? The safe upper