Review: Very helpful information.
Rating: 5 out of 5
Date: 02 4, 2013
This is a short book with a lot of good info. It explains the different types of  D, if you should take a supplement and if so how much  you should take, and the normal amounts that infants, adolescents, adults and seniors should take. There is more info in there as well, all in about 56 pages. What I really liked . Is that you get the info without anyone trying to sell you anything.