My only complaint is that the pages are as thin as tissue paper, otherwise it is a superb text.I mostly bought it to silence my mother who is a big Adelle Davis fan. For those out there who aren't ancient enough to remember that hypocritical nutritionist, she had a series of bestsellers in the '60's, but smoked and died from cancer. Anyway this book did the trick--mom quit giving me crackpot advise about vitamins.