This is the third serum I'm going to apply, and this is from The INKEY List, and it is the polyglutamic acid.
这是我要使用的第三种血清，来自 The INKEY List，它是聚谷氨酸。
英语百科
Polyglutamic acid
Polyglutamic acid (PGA) is a polymer of the amino acid glutamic acid (GA). Gamma PGA (Poly-γ-glutamic acid, γ-PGA) - the form where the peptide bonds are between the amino group of GA and the carboxyl group at the end of the GA side chain) - is a major constituent of the Japanese food natto. Gamma PGA is formed by bacterial fermentation.