Promotes restful sleepProvides nervous system supportNon-GMOFree of gluten, dairy, nuts, soy, and synthetic colors Meet The Vitamin Shoppe brand non-GMO Glycine capsules. In addition to supporting your nervous system, this non-essential amino acid can help you enjoy a night of uninterrupted Zzzs. Glycine is also a major component of collagen (hello, elasticity!) and helps your body create glutathione. Frequently Asked Questions What are amino acids? Amino acids are molecules that come together to form proteins. There are 22 amino acids that are required by humans, and 9 of which must be consumed in our everyday diet. What is a nonessential amino acid?A non-essential amino acid is an amino acid that your body can create on its own. There are 11 non-essential amino acids: alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. What is glutathione?Glutathione is an antioxidant that helps defend cells against free radical damage.