Journal of Cosmetic Dermatology · 2010 · rct
Randomized controlled trial: Clinical trial evidence for urea moisturizer tolerance and efficacy in AD patients.
humectant
Dual-action: at ≤10% acts as a humectant and barrier modulator; at ≥20% provides keratolytic effect by disrupting hydrogen bonds in keratin. Enhances penetration of co-formulated actives.
| Concern | Strength | Studies | What the research says |
|---|---|---|---|
| Dryness | Strong | 5 | Randomized controlled trial: Clinical trial evidence for urea moisturizer tolerance and efficacy in AD patients. |
| Uneven texture | Relevant | — | Auto-proposed from evidence_summary keywords — REVIEW. |
No known conflicts — Urea isn’t flagged against any concern or skin condition.
Strength reflects the ingredient’s effect on each concern; study counts match research whose findings relate to that concern.
Urea is a humectant backed by a large, consistent body of clinical evidence (evidence tier 1 of 4). We track 9 studies for it, 6 reporting a positive effect. It is typically effective at 5–40% in a formulation.
Journal of Cosmetic Dermatology · 2010 · rct
Randomized controlled trial: Clinical trial evidence for urea moisturizer tolerance and efficacy in AD patients.
Journal of Investigative Dermatology · 2012 · rct · n=60
Double-blind RCT (n=60): 10% urea cream applied to xerotic skin for 4 weeks significantly improved barrier function (TEWL reduced by 30%, p<0.001), increased stratum corneum hydration (p<0.001), and upregulated AQP3, filaggrin, loricrin, and involucrin gene expression vs vehicle
Archives of Dermatological Research · 1996 · observational
Clinical study: Evidence for urea barrier function improvement beyond humectancy.
International Journal of Clinical Practice · 2020 · in vitro
In-vitro/mechanistic study: PRIMARY mechanistic reference establishing gene regulatory activity AMP upregulation lipid synthesis enhancement beyond passive humectancy.
Dermatology Online Journal · 2013 · review
Comprehensive review of urea's clinical literature: urea functions as a humectant and natural moisturizing factor component that enhances stratum corneum hydration, acts keratolytically at higher concentrations, improves skin barrier function and antimicrobial defense, and increases penetration of co-applied agents; effective across xerosis, ichthyosis, atopic dermatitis, and psoriasis.
Dermatology and Therapy · 2021 · review
Review: PIVOTAL modern comprehensive review establishing concentration dependent mechanism framework and clinical applications across xerosis AD ichthyosis psoriasis and additional indications.
+ 3 more studies in our evidence base.
In 366 products — most often moisturizers (133), serums (126), cleansers (27), from $5.01 to $514.35. Set up a profile to rank these for your skin. Click any product to learn more.
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Murad Retinol Youth Renewal Night Cream
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Set up your skin profileEducational information, not medical advice. Study findings summarise the cited research and may not reflect every formulation.