Also known as: Carbamide
What Is Urea?
Urea is a small molecule that occurs naturally in the outer layer of skin as part of the natural moisturizing factor, the mix of compounds that helps skin cells hold water. Cosmetic urea is synthesized in a lab, so it is not taken from animal or human sources. It is a strong humectant and is especially effective on skin that is dry and rough rather than simply dehydrated.
What urea does depends on how much is in the formula. Lower concentrations, often up to about 10 percent, mainly hydrate and improve the feel of dry facial or body skin. Higher concentrations, commonly 20 percent or more, have a keratolytic effect, meaning they help loosen and soften built-up dead skin on rough areas such as heels, knees and elbows. That dual role makes it a bridge between moisturizers and gentle exfoliants like lactic acid.
Urea is popular in body care and in moisturizers for very dry skin, and low-percentage versions appear in some facial creams and essences.
Urea Benefits for Skin
- Draws water into the skin and helps it stay there.
- Smooths rough, bumpy texture over time.
- Softens thick, cracked skin on heels and elbows at higher strengths.
- Can help other moisturizing ingredients work more effectively.
- Odorless and easy to combine with most routines.
How to Use Urea
For the face, choose a moisturizer with a low urea percentage and apply it after serums. For rough body areas, a higher-strength cream applied after bathing, while skin is still a little damp, works well. Pair it with ceramides or occlusives for very dry patches.
Higher-strength urea is usually best kept to the body or targeted spots, and it is wise not to combine it with other exfoliating acids on the same area until you know how your skin responds.
Side Effects & Precautions
Urea can sting on cracked, broken or freshly shaved skin, particularly at higher concentrations. Avoid applying it to open wounds. If you have a damaged barrier on the face, start with a low-strength product or wait until the skin has calmed.
Some people notice a faint ammonia-like smell in older urea products, which can happen as urea slowly breaks down over time. Store creams with the lid closed and replace them if the smell or texture changes noticeably.
Use caution when combining
- Strong exfoliating acids on the same area
- Broken or freshly shaved skin
Frequently Asked Questions
Is urea in skincare made from urine?
No. Cosmetic urea is synthesized in a lab. It is chemically the same molecule found in skin, but it is not taken from any body fluid.
What percentage of urea should I use on my face?
Lower percentages are typically used for facial skin, where the goal is hydration. Higher strengths are mostly meant for the body and very rough areas.
Why does urea cream sting?
Stinging usually means the skin surface is cracked or irritated. Try a lower strength, or let the area heal before using it again.