This anti-aging pure retinol face and neck serum leaves skin feeling smoother hydrated and renewed. As a result the look of lines wrinkles and premature sun damage is reduced. This retinol serum combines concentrated pure retinol and vitamin B3 for optimal effectiveness while also being suitable for sensitive skin. Pure retinol can react on contact with the air turning yellow. This does not impair its tolerance or efficacy. As a precautionary measure avoid using products containing retinol during pregnancy and while breastfeeding.