Retinol.

What it does

Benefits

• Reduces fine lines, wrinkles, and roughness with clinical and histological improvement shown in studies
• Increases skin cell turnover and normalizes keratinization for smoother, firmer-looking skin
• Helps even tone and fade mottled hyperpigmentation from sun damage
• Gentler and better tolerated than prescription tretinoin while still effective

Side effects

• Commonly causes a 'retinoid dermatitis' adjustment phase: redness, scaling, dryness, and itching, especially early on
• Increases the skin's sensitivity to the sun, so daily sunscreen and nighttime application are recommended
• Higher strengths (around 1%) are more likely to irritate, so gradual introduction is advised

Who it's for

People focused on anti-aging — fine lines, uneven texture, and tone — who want a well-evidenced active with a milder profile than prescription retinoids

Who should be careful