How Much Vitamin D3 Per Day? 1,000 vs. 2,000 vs. 5,000 IU
1,000, 2,000 or 5,000 IU? Here's how common vitamin D3 doses compare with the RDA and the upper limit, and who each one is for.
1,000, 2,000 or 5,000 IU? Here's how common vitamin D3 doses compare with the RDA and the upper limit, and who each one is for.
The official B12 target is just 2.4 mcg a day, yet many supplements contain 1,000 mcg. Here's why the gap exists and how to read the numbers.