Product Description C21 Forteis a highly concentrated treatment with21% pure Vitamin Cfor professional use.Formula in combination with other synergistic active ingredients that corrects the most visible signs of skin aging while improving skin elasticity and firmness. Exclusive formula that is formed when the powder phase comes into contact with the liquid phase just at the moment of application.This system prevents the progressive degradation of the active ingredients and maximizes the action on the skin. ACTIVE Pure vitamin C (21%):Revitalizing and illuminating effect. Vitamin E and ferulic acid:Multiply the benefits of Vitamin C up to x8 the effectiveness of the treatment. Ellagic acid:Protector against UV radiation. Hyaluronic acid:Protection and hydration. Bioalgae:Anti-free radicals and balancer of the skin microbiome. B-carotene:Prevents and protects the skin. Avenantramide:Reduces inflammation. HOW TO USE: Apply to face, neck and dcolletage, avoiding the eye contour. Perform a gentle massage until completely absorbed. Shake before using. Use the cap to close it again after use. Clean the end after each use. It is recommended to apply sunscreen during the day. Frequency: 1 dose per week for 15 days. Rest period: 30 days.