Anti-ageing treatment emulsion suitable for normal to mildly sensitive skin that helps to prevent and correct the visible signs of physiological and sun induced skin ageing. Contains Retinaldehyde, the most potent form of Vitamin A available without prescription, yet will not irritate a sensitive skin. Vitamin A is known to improve the texture and tone of the skin, to keep the skin looking smooth and firm. Retinaldehyde is ten times more potent than Retinol as a form of vitamin A. Also contains Pre-tocopherol, a stabilized form of Vitamin E as for its anti-oxidant effects - prevents premature damage to the skin. YSTHEAL is Avene's anti-ageing range that focuses on PREVENTION. It is designed to address the first signs of ageing; typically a client aged 30-45, however, younger clients concerned about ageing can begin to use this product if they wish in there 20's. These products are for night time application when they can penetrate and effect the skin to produce best benefits and are not recommended to be used during the day.