For your skin
The prescription-strength version of retinol. Same goals (smoother, more even skin), but works faster and is more irritating. Needs a doctor.
Want the science? Keep reading ↓Mechanism of action
Active form of vitamin A that binds retinoid receptors directly to normalize keratinization and boost collagen.
Why we tier this strong
5 cited papers across 2 countries. Multiple positive efficacy results plus regulatory backing. Our catalog highlights 5 cited papers as direct references, a curated sample from the broader body of published research that earns Tretinoin its Strong tier (15+ studies including multiple RCTs or a large longitudinal cohort). See our methodology for how we evaluate evidence.
Layering matrix
- Salicylic Acidhigh
Tretinoin + salicylic acid — major irritation risk. Strict separation required.
- Glycolic Acidhigh
Tretinoin + glycolic acid causes significant barrier disruption. Never layer.
- Lactic Acidhigh
Tretinoin + lactic acid — stack of two active resurfacers, very irritating.
- Benzoyl Peroxidemedium
Benzoyl peroxide breaks down tretinoin unless they're in a stabilized formula made to combine them. Use one in the morning and the other at night.
- Hydroquinonemedium
Recognized depigmenting combination (Kligman formula) but increases sensitivity — physician oversight recommended.
Compare with
Cited research
SCCS Revision of the Scientific Opinion on Vitamin A (Retinol, Retinyl Acetate, Retinyl Palmitate), SCCS/1639/21 (tretinoin is a prescription drug not regulated as cosmetic in EU; vitamin A opinion is the closest regulatory document)
Darlenski R et al., Topical retinoids in the management of photodamaged skin: from theory to evidence-based practical approach, British Journal of Dermatology 2010 — concludes tretinoin remains the best-evidenced topical retinoid for photodamage management
Bellemère G et al., Antiaging action of retinol: from molecular to clinical, Skin Pharmacology and Physiology 2009 — mechanism + clinical review linking retinol/tretinoin to collagen induction and clinical antiaging effects
Mukherjee S et al., Retinoids in the treatment of skin aging, Clinical Interventions in Aging 2006;1(4):327-48
Stratigos AJ, Katsambas AD, The role of topical retinoids in the treatment of photoaging, Drugs 2005;65(8):1061-72 — tretinoin singled out as most-studied retinoid for photoaging reversal
Sources: 10 clinical journals and regulatory databases across the US, EU, Korea, Japan, and China. Every entry points to a specific document. See methodology for the full list and what each outcome label means.