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Urea

What is urea, exactly? Urea isn't just a metabolic byproduct—it's a valuable cosmetic ingredient and part of the skin's natural moisturizing factor (NMF).

What does urea do for skin? It helps hold onto moisture, keeping it soft and supple. In general, urea in skin care works in a few key ways: deep hydration, gentle exfoliation, and barrier repair.

Keep in mind that skincare products use a synthetic version of urea, which is odorless and safe.

How to use it

The right concentration of urea for skin depends on your goals, where you're using it, and how strong you need it:

• 1-3%: Great for everyday hydration on the face and body. Helps maintain your skin's moisture balance and works well for daily use.
• 5-10%: Better for deeper hydration and softening dry, flaky skin. You'll often find this in hand and body creams.
• 10% and above: Talk to your doctor before trying this strength. When it comes to urea in skin care, most products stick to 10% or less.

Suitable for

Any skin type, but especially dry and dehydrated skin. Use with caution on sensitive skin, and avoid high concentrations.

Things to know

Pairs well with almost any ingredient, especially panthenol, hyaluronic acid, ceramides, and others.

Ingredient Overview

INCI name Urea
Function Antistatic, buffering, humectant, skin conditioning
CAS number 57-13-6
Chemical formula CH4N2O
Common use Face care, body care

FAQ

1. Does urea lighten the skin?

No, urea doesn't affect melanin production, the pigment responsible for your skin color. The main urea skin benefits are its keratolytic (exfoliating) and moisturizing effects. It helps skin shed dry, flaky, rough patches, leaving it smoother and healthier-looking.

2. How long does urea take to work?

Results depend on the urea concentration and your skin's condition. For visible exfoliation, use a cream with 20-30% urea—you'll see rough skin (like on the heels) soften and slough off in about 7 days of regular use. For overall skin improvement, you can see a significant boost in hydration and elasticity after 2-4 weeks.

3. How does urea exfoliate the skin?

It breaks the bonds between dead skin cells—like dissolving the glue between old bricks. This lets rough, flaky skin wash away, leaving it smooth.