Highly concentrated 0.5% pure retinol No purified water or retinol derivatives. Formulated using 0.5% stabilized, pure retinol for powerful anti-aging care. Best for skin accustomed to retinol but still experiencing progressive signs of aging such as loss of elasticity and dryness. For intermediate-level retinol users looking for a highly concentrated, youth booster. Intensive treatment for a youthful and radiant complexion! Clinical Results in 4 weeks - 22.02% improvement of wrinkles(forehead) - 18.40% improvement of wrinkles(nasolabial) - 17.68% improvement of wrinkles(eye area) - 16.91% improvement of elasticity (external elasticity) - 13.43% improvement of elasticity (internal elasticity) - 13.78% improvement of lifting (mouth corner) - 13.54% improvement of lifting (chin) - 4.28% improvement of skin age Clinical Results in 2 weeks - 48.87% improvement of pore (volume) - 45.74% improvement of pore (area) *Based on clinical trials of 20 subjects. *Dermacosmetic Skin Science