The Claim
Topical application of retinol and retinoic acid is associated with an early and transient upregulation of glycolytic enzymes and translation initiation factors in the stratum corneum, with peak expression at 3 months and decline by 12 months.
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.
Applying retinol and retinoic acid to the skin increases the activity of certain metabolic and protein-building molecules in the outer skin layer, reaching highest levels at 3 months and decreasing by 12 months.
See the scientific wording
Topical retinol and retinoic acid are associated with an early and transient upregulation of glycolytic enzymes and translation initiation factors in the stratum corneum, with peak changes occurring at 3 months and declining by 12 months, suggesting an initial metabolic and biosynthetic response that stabilizes over time.
When retinol or retinoic acid is applied to the skin, it triggers skin cells to produce more energy and build more proteins for a few months. This surge helps the skin repair and renew itself faster. After three months, the cells slow down this activity because they no longer need to work as hard, and the skin stabilizes into a new balanced state.
What the research says
1 studyWhen people use retinol or retinoic acid cream, their skin cells work harder at first—making more energy and proteins—but after a few months, they calm down and get used to it, which is exactly what this study found.
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.