Glycine is a "conditionally essential" amino acid, one of the twenty amino acids that are the building blocks of proteins. Glycine is produced by the body and -- if you're healthy enough -- can be found abundantly in tendons, ligaments, connective tissues and skin, keeping them all firm and flexible. In the diet animals foods are the greatest source of this potent anti-inflammatory that has numerous benefits for human health including: the regulation of sleep and circadian rhythms,...