Urea

Urea is a small, naturally occurring molecule that is part of skin's own natural moisturizing factor; cosmetic grades are made synthetically. It is unusual because its behavior depends on concentration: at low percentages it acts as a humectant that draws and holds water, while at roughly 10 percent and above it becomes keratolytic, softening and helping shed thickened, rough skin. The evidence is strong. Urea is well documented in dermatology for dry skin conditions (xerosis), rough keratosis pilaris bumps, calluses and scaly, thickened skin, with both its hydrating and its keratin-softening actions supported by clinical use. It is a practical, proven ingredient rather than a trend. It is best for very dry, flaky, rough or bumpy skin, including body areas like elbows, heels and keratosis-prone arms, and for eczema-prone skin needing moisture. It maps to dryness, texture and eczema-prone concerns. Layering is easy. Low-percentage urea sits in everyday moisturizers alongside glycerin, ceramides, panthenol and hyaluronic acid, while higher-percentage urea targets specific rough patches. It pairs well with barrier ingredients and has no notable conflicts. On safety, higher concentrations can sting on broken, cracked or freshly shaved skin, so apply high-percentage urea to intact skin and buffer as needed. It is typically fragrance-free and does not feed Malassezia. Urea is generally considered safe for use during pregnancy, but as with any product, confirm with your clinician if you have specific concerns or are treating a medical skin condition.