Amino acids are organic compounds found in our bodies which contain carboxylic acid (-COOH), amines and side chains. They mainly contain hydrogen, carbon, nitrogen and oxygen. These acids are very important for nutrition and are therefore, used in food technologies and nutrition supplements. After water, amino acids comprise the largest component in human cells and tissues. This book presents the complex subject of amino acids in the most comprehensible and easy to understand language. The topics included in it are of utmost significance and are bound to provide incredible insights to readers. Different approaches, evaluations and methodologies on amino acids have been included in this text. It is a complete source of knowledge on the present status of this important field.