This service is staffed by librarians at ARC and the rest of the world. So, great for getting quick answers to quick questions, but if you want to talk with a librarian who is already familiar with the assignment and the ARC library, please use our contact info above.
These are all reputable sources that will provide you with most of the info you need :) Try searching them for the vitamin or mineral you are researching. There are videos below that show you how these bad boys work :)
Vitamins and minerals are sometimes known by more than one name. If that's the case with your nutrient, try searching for the other name or names as well. For example, if I'm looking for info on Vitamin C, I might also try searching for ascorbic acid.