Very thorough, well written exposition of individual Amino Acids and their effects on the body. If you still remember your high school Biology, you'll remember that amino acids were defined as "the building blocks of life."I started learning about their power for healing the body about two years ago, when I was trying to help my husband recover from a bout of crippling fatigue. Amino acids are components of protein and their targeted use can do amazing things for the body. You'll learn about l-carnitine, l-tryptophan, l-tyrosine & many others that can help you live a healthier, happier life in our high-stress modern world (filled with processed foods & unbalanced amino acid profiles).The book is very detailed without being overly technical. It's easy to understand; it has been a priceless resource for me and will stay an integral part of my medical library forever. Highly recommended--get a copy while you can!