Glutamic acid serves as a building block for proteins and is involved in various physiological processes. Glutamic acid plays a crucial role in maintaining the skin’s moisture balance. It is involved in the synthesis of natural moisturizing factors (NMFs), such as pyrrolidone carboxylic acid and urea. These NMFs help to attract and retain water in the skin, promoting hydration and a healthy complexion. Glutamic acid exhibits antioxidant properties, helping to neutralize free radicals and protect our skin cells from oxidative stress. Additionally, glutamic acid is involved in collagen production, the protein responsible for maintaining skin elasticity and firmness. [16]
https://www.aminoacid-studies.com/amino-acids/glutamine-and-glutamic-acid.html
Jara, C.P., et al., Glutamic acid promotes hair growth in mice. Scientific Reports, 2021. 11(1): p. 15453.