ALLANTOIN

Allantoin is a skin-soothing active ingredient found in plants such as comfrey. In a study, a cream containing 0.5% allantoin was able to accelerate skin regeneration and reduce skin redness after targeted irritation, and allantoin also has an occlusive effect and can thus reduce transepidermal water loss from the skin.(1)
Allantoin also has a strong antioxidant effect and protects the skin from free radicals. (2)

(1) Becker, L. C., Bergfeld, W. F., Belsito, D. V., Klaassen, C. D., Marks, J. G., Jr, Shank, R. C., Slaga, T. J., Snyder, P. W., & Alan Andersen, F. (2010). Final report of the safety assessment of allantoin and its related complexes. International journal of toxicology, 29(3 Suppl), 84-97.

(2) Gus'kov, E. P., Kletskii, M. E., Kornienko, I. V., Olekhnovich, L. P., Chistyakov, V. A., Shkurat, T. P., Prokof'ev, V. N., & Zhdanov, Y. (2002). Allantoin as a free-radical scavenger. Doklady. Biochemistry and biophysics, 383, 105-107.