I believe in knowing what I put on, in & around my body, but this takes research! In today's world there is no excuse not to research, with the availability of info. With diseases like diabetes & cancer becoming almost epidemic, knowledge is essential! Read! Research!
SP has tons of articles, info & daily health news, read it!
Also great websites by Dr Oz & WHfoods.org.
Buy a couple of reference books, my favs: Nutrition Almanac & You, the owner's Manual..