✓ LEGITSkincare
Tretinoin (Retinoic Acid)
Prescription retinoid that measurably improves skin texture, fine lines, and photoaging.
Also called: tret · retin-a · retinoic acid · retinol
Verdict — legit
Does what it claims, with evidence behind it.
Evidence grade A
Multiple randomised controlled trials, or a meta-analysis of them. As settled as this field gets.
Mechanism
Binds retinoic acid receptors, accelerating epidermal turnover and stimulating dermal collagen I and III synthesis.
Citations
- Topical tretinoin for photoaged skin: a double-blind vehicle-controlled studyJAMA · 1988
- Retinoids in the treatment of skin aging: an overview of clinical efficacy and safetyClinical Interventions in Aging · 2006
The full read
Tretinoin is the single best-evidenced topical for skin quality. Decades of randomized controlled trials show significant improvement in fine wrinkles, dyspigmentation, and roughness after 6–12 months of consistent use. Expect an adjustment period ('retinization') of dryness and irritation in weeks 2–8. Requires prescription in most countries; adapalene is an OTC alternative with similar (slightly weaker) evidence.
Photo: Tretinoin dermatological effects (Baldo-Simo 2025).png by Pablo Balado-Simó, Daniel Morgado-Carrasco, Sara Gómez-Armayones, Anna López-Ferrer, Didac Barco, Carla Ferrándiz-Pulido, Sebastian Podlipnik · CC BY 4.0 via Wikimedia Commons.
