Can you use glycolic acid with urea?
The chemistry
Glycolic acid is the smallest alpha hydroxy acid. It loosens the bonds between dead surface cells so they shed more evenly (Kornhauser 2010). Urea draws and holds water in the outer layer and softens scale, especially at higher strengths (Celleno 2018). The pair turns up in creams for rough body skin. In a retrospective pilot study of 17 people with acanthosis nigricans in the underarms, patients had six salicylic and mandelic acid peels and then applied a nightly cream of glycolic acid, urea and cetylated fatty esters for nine months. All 17 improved in pigment and thickness, and no relapses were seen in a further nine months of follow-up. Redness and burning after the peels were common but lasted one to two days (Zeeshan 2022). Because the peels and the cream were used in sequence, the study cannot show how much the cream did on its own.
Chemistry
No known conflict. They appear together in body creams.
Irritation
Moderate. Glycolic acid stings on broken skin; urea can tingle.
Order and wait
One combined cream needs no sequence. Separate face products: different nights.
Common mistakes
A frequent mistake is assuming urea is purely soothing. At body-cream strengths it is a mild exfoliant too, so a strong glycolic toner followed by a strong urea cream is two exfoliating steps. Another is forgetting sun protection on treated arms, legs or the neck: glycolic acid increases how much UV damages skin while you use it (Kaidbey 2003). Lastly, people expect overnight change on thickened skin; the study above ran for nine months.
Your routine
Morning
- Gentle wash
- Plain moisturizer
- Sunscreen on exposed treated skin
Evening
- Gentle wash, pat dry
- Glycolic acid and urea cream on rough areas
- Nothing else exfoliating that night
Sample week
For a combined body cream: most nights, with rest nights if skin stings.
Go slower if
Skip both on cracked, sunburned or freshly shaved skin. If you have a dark, velvety rash like acanthosis nigricans, see a doctor first, because it can be linked to insulin resistance and needs a diagnosis.
Evidence strength
Moderate at best. The only study we found of this pair is a small retrospective pilot where the cream followed a course of peels (Zeeshan 2022). Each ingredient has solid evidence on its own (Kornhauser 2010, Celleno 2018).
Products with glycolic acid
The Ordinary Glycolic Acid 7% Exfoliating Toner
Picked for glycolic acid
Glycolic acid sits second on the label, with aloe and glycerin.
Buy on Amazon (opens in a new tab)FAQ
Does glycolic acid go before or after urea?
With separate products, glycolic acid goes first on dry skin, and urea moisturizer after. No study has tested the order; it follows the usual rule of thinner, active steps first.
How long should I wait between them?
No interval has been studied. If you layer them, wait until the glycolic acid has dried, about a minute or two. On the face, using them on different nights is gentler.
Is a glycolic and urea cream safe for my face?
Body creams are usually stronger than face products need. Use them below the jawline unless the label says otherwise.
Do I need sunscreen with this cream?
Yes, on any exposed skin you treat, because glycolic acid raises UV sensitivity (Kaidbey 2003).
Related combinations
- RetinolYes, with timing
- Vitamin CYes, with timing
- NiacinamideYes
- TretinoinYes, with timing
- Salicylic AcidYes, with care
- Hyaluronic AcidYes
- Benzoyl PeroxideYes, with timing
- SunscreenYes
Sources
- Zeeshan M, et al. Treatment of acanthosis nigricans with sequential salicylic acid-mandelic acid combination peel and maintenance with glycolic acid-urea combination cream: a retrospective pilot study. J Cosmet Dermatol. 2022;21(9):3905-3909.
- Kornhauser A, Coelho SG, Hearing VJ. Applications of hydroxy acids: classification, mechanisms, and photoactivity. Clin Cosmet Investig Dermatol. 2010;3:135-142.
- Celleno L. Topical urea in skincare: a review. Dermatol Ther. 2018;31(6):e12690.
- Kaidbey K, et al. Topical glycolic acid enhances photodamage by ultraviolet light. Photodermatol Photoimmunol Photomed. 2003;19(1):21-27.