Vitamin A (Retinol)

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Firmness / AgingAntioxidantExfoliation / Pores

INCI: Retinol (Vitamin A)

Effect

Turnover promotion, collagen synthesis, wrinkle improvement

Mechanism

Converts to retinal → retinoic acid → Binds to RAR/RXR nuclear receptors

Typical concentration

0.01-0.1%

Onset

Skin texture: 4-6 weeks. Wrinkles: 12-24 weeks

Cautions

Night use only. Contraindicated during pregnancy. Increased irritation when combined with AHA/BHA

Evidence & references

Kafi et al. (2007) [PubMed]

Journal

Related Journal

Skin-Concern SolutionsFor Those Who Can't Feel Their Aging Skin Recovering -- The "Foundation" Your Skin Needs Care Guides by ConcernWrinkle and sagging care — how to protect collagen and elastin Care Guides by ConcernPore and acne care — the 3 factors of sebum, keratinization, and inflammation Skincare FundamentalsThe Correct Skincare Order — Why This Sequence Matters The Complete Peptide GuideThe science of multi-peptide formulations -- synergy and antagonism The Complete Vitamin C GuideVitamin C x other ingredients -- synergies and contraindications An Honest Word on IngredientsThe Truth About "Collagen-Infused" — Does Topical Application Really Work?Anti-Aging vs LongevityThe limits of anti-aging—why "erasing" care doesn’t last Anti-Aging vs LongevityMost anti-aging ingredients are "symptomatic treatment"—the difference from fundamental care Anti-Aging vs LongevityWhy "fighting back" fails—from the perspective of cellular senescence and SASP

This page is reference information and does not guarantee efficacy. Figures vary by test conditions (in vitro / manufacturer / concentration). It does not indicate pharmaceutical efficacy.

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