Glutamine

A humectant moisturizing amino acid that, aside from attracting water to the skin’s surface, can also soothe allergic itching and reduce the signs of inflammation.
Moisturizing
Other functions
Origin
Glutamine

Overview

Glutamine is a semi-essential amino acid that occurs naturally in the proteins of the human body. It is derived from glutamic acid (read about it here) and shares many of its functions: it is humectant moisturizing and water-retaining ingredient that sits on top of the skin.

According to one research experiment done on mice, a 4% glutamine solution was able to help with the signs of allergic contact dermatitis, reducing signs of inflammation and itching.

Science

1
Oshimura, E., & Sakamoto, K. (2017). Amino Acids, Peptides, and Proteins. Cosmetic Science and Technology, 285–303.
2
Jin, Z. W., et al. (2012). Glutamine suppresses dinitrophenol fluorobenzene-induced allergic contact dermatitis and itching: inhibition of contact dermatitis by glutamine. Journal of dermatological science, 67(2), 88–94.