N-A-G™, also known as N-Acetyl-Glucosamine, belongs to a class of nutrients called. amino sugars, which are usually formed from glucose and amino acids (glutamine, in the case of N-A-G™). Amino sugars are essential components of all body tissues, being integral parts of cell membranes and their surface structures, as well as of the tissues which hold cells together. Recent research has revealed that this often overlooked bodily component can be of vital importance to our overall health. Our bodies use approximately 10 different amino sugars. They are burned for energy and used in the manufacture of tissue components. During the course of the body's normal wear-and-tear, tissues are constantly broken down, and then replaced or restructured, creating a continuous demand for amino sugars. Unfortunately, because dietary supplies of amino sugars are usually low, the body must synthesize them from glucose and the appropriate amino acid.