How to Use the Skin Aging Speed Predictor
Skin aging is split into intrinsic aging (genetics, time) and extrinsic aging (UV, smoking, poor sleep). Extrinsic aging is largely preventable with lifestyle changes. UV radiation alone accounts for about 80% of visible facial aging.
Applying sunscreen daily is the single most impactful anti-aging habit — it can meaningfully lower your estimated skin age. Quality sleep also matters: growth hormone released during sleep drives skin cell regeneration.
Frequently Asked Questions
Retinol (vitamin A derivative) boosts collagen synthesis and accelerates cell turnover, reducing wrinkles and pigmentation. Start with a low concentration (0.01–0.03%) and always pair it with daily sunscreen, as retinol increases sun sensitivity.
During sleep, growth hormone regenerates skin cells. Chronic sleep deprivation raises cortisol, which breaks down collagen and reduces blood flow to the skin — causing dull complexion, puffiness, and accelerated wrinkle formation.
Daily SPF 30+ sunscreen, quitting smoking, 7+ hours of sleep, 1.5 L+ of daily hydration, and antioxidants (vitamin C and E). These five habits alone can visibly slow skin aging by several years.