The Claim
Topical tretinoin applied for 16 weeks significantly improves visible signs of photoaged skin on the forearms and face compared to vehicle cream in a randomized, double-blind, controlled trial of 30 participants.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
After 16 weeks of use, topical tretinoin reduces visible signs of sun-damaged skin on the face and forearms more than a placebo cream.
See the scientific wording
Topical tretinoin applied for 16 weeks significantly improves visible signs of photoaged skin on the forearms and face compared to vehicle cream, as demonstrated in a randomized, double-blind, controlled trial of 30 participants, with all tretinoin-treated forearms showing improvement and 14 of 15 tretinoin-treated faces showing improvement versus no improvement in vehicle-treated faces.
Tretinoin enters the skin and turns into retinoic acid, which binds to receptors in skin cells, turning on genes that make more collagen and turning off genes that break down collagen. This thickens the deeper layer of skin and smooths out wrinkles and damage caused by sun exposure.
What the research says
1 studyStudy: Topical Tretinoin Improves Photoaged Skin
This study showed that putting tretinoin cream on sun-damaged skin for 16 weeks made the skin look better, while the plain cream (placebo) did nothing. Everyone who used tretinoin saw improvement, so it really works.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.