Many people are saying up to 1200 units every single day. Why? Because you need that much D to absorb the calcium, you need that much D to have good muscle function. If you have less D in your ...
Vitamins B, C and D, for instance, were all discovered as a result of research on diseases (beriberi, scurvy and rickets, respectively) that plagued various groups of people from the 1700s through ...