Allantoin is a naturally occurring compound in our bodies - a byproduct of uric acid that can be extracted from urea and is the result of metabolic processes. It serves as an effective anti-inflammatory and soothing agent and has moisturizing properties, giving it value especially in treating sensitive or compromised skin. 

European Journal of Pharmacology, February 2018, pages 68-78

Journal of the American Academy of Dermatology, June 2017, Volume 76, Issue 2, Supplement 1