Glycine is one of the amino acids that make up proteins.
What Is Glycine?
Glycine is one of the 20 amino acids that make up proteins. It is not among the nine essential amino acids the body cannot make.
Source：[1]
Foods Containing Glycine
Gelatin, made from collagen, is especially rich in glycine: pork gelatin contains 24,000 mg per 100 g, about a quarter of its amino acids. Collagen’s structure features repeating glycine–proline–hydroxyproline sequences.
Regulatory Status
Glycine is used as a food additive (seasoning, fortifier). Under MHLW’s food/drug classification, it is not regarded as a drug unless drug-like claims are made.
Source：[4]
Related Ingredients
Dr.JAPAN Products Containing This Ingredient
Dr.ACIS
Sources
- [1]MHLW e-health net, "Amino acids"
https://kennet.mhlw.go.jp/information/information/dictionary/food/ye-001.html - [2]MEXT, Standard Tables of Food Composition in Japan (8th ed., 2023)
https://fooddb.mext.go.jp/ - [3]Okuyama K. (Osaka University), Journal of the Crystallographic Society of Japan 54(5), 2012
https://www.jstage.jst.go.jp/article/jcrsj/54/5/54_263/_article/-char/ja - [4]MHLW, Examples of the food/drug classification of ingredients (2026)
https://www.mhlw.go.jp/content/001734204.pdf
This page provides general information about the ingredient and does not indicate the effects or efficacy of any product.