Glycine is essential for improving the appearance of tired, aging skin.
As an amino acid, glycine is necessary for the development of protein within the skin and other tissues of the body. Glycine is what is referred to as a non-essential amino acid, meaning that it is naturally produced within the body, and doesn’t typically need to be ingested from outside sources as a part of the diet — at least not when you are young and healthy. However, like other amino acids, its production and preservation within the body tends to decrease with age. Studies show it may be beneficial to supplement certain agents the skin naturally produces as you age, including vitamin E, fatty acids, and amino acids like glycine.
Don’t get confused!
Glycine is one of the more confusing ingredients in skin care. You can see glycine as “Glycine soja,” which is soy extract, or you can see glycine as an amino acid in skin care, which is how we are referring to it here.
Glycine may improve wrinkles, especially when used in conjunction with two additional amino acids, leucine and proline (European Journal of Dermatology, 2013). Interestingly, many peptides are comprised of sequences including glycine, including the firming palmitoyl oligopeptide, which has the sequence valine-glycine–
When used within a skin care product or other topical treatment, glycine may help to repair damaged tissue and to promote healing (Eksp Klin Pharmacol, 2014).