Urea is a natural ingredient already in your skin that helps it hold onto water and stay healthy. In low doses (10% or less), it moisturizes; at higher concentrations, it can help shed dead skin cells. It also works well alongside other active ingredients because it helps them penetrate deeper into skin.

This was a literature review where the researcher examined existing clinical studies on urea's effects on skin health and various skin conditions.

Funding not disclosed in abstract