This A-Z guide to supplements draws on Prescription for Nutritional Healing - America's best-selling book on natural health (now in it's third edition). It presents authoritative information about some 350 of the most important supplements available today in a handy, pocket-sized format. Revised and expanded from the first edition, it covers how these supplements work, how to use them and what to look for when choosing supplement products. Here is a straightforward, easy-to-understand guide to vitamins, minerals, amino acids, enzymes, antioxidants, phytochemicals, herbs and more.