Receive this free Cosrx 50ml AHA BHA Toner with purchase of any Cosrx item. While supplies last. 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. Feel the benefits of Retinol without irritation. (*Based on clinical trials- 30 subjects completed the test.) How to Use: Start samll and slow! During evening care, apply 1 to 2 drops to hand and tap with fingertips from inside out, let absorb. Limit initial use to three times per week; gradually increase frequency to every other night, use as tolerated. * Have an ‘adaption period’ when using retinol Week 1~2 - Frequency : Use only 2~3 times a week at night - How to Use : After cleansing, at the moisturizer step, apply 1-2 drops to areas of concern. e.g. under eyes, mouth, forehead and neck Week 3 - Frequency : May apply every other day at night - How to use : After cleansing, at the moisturizer step, may spread over the entire face. * The "building tolerance" phase can be shortened or extended depending on individual differences * Maintain this phase until no discomfort is experienced. * Gradually increase frequency and areas of application. Concerns: Loss of Firmness, Dryness, Anti-Aging Fluid Ounces: .6 oz. Ingredients: Squalene/Squalane, Retinoid, Vitamin E Skin Type: Combination, Normal, Oily, Dry When To Use: Nighttime Skin Care Country of Origin: Imported Ingredients: Squalane, Glycine Soja (Soybean) Oil, Di-C12-13 Alkyl Malate, Retinol(0.5%), Caprylic/Capric Triglyceride, BHT, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Hydroxymethoxyphenyl Decanone Please be aware ingredients are subject to change periodically. It is recommended you check the product packaging prior to use for a complete ingredient list.