Retinaldehyde or Retinal (RETINAL) is a precursor of retinoic acid, an intermediate metabolite produced in the transformation of retinol into retinoic acid in human keratinocytes. Retinal is metabolised to retinoic acid in the skin, as well as to retinol and retinyl esters (which usually diminish during photo-aging) and are indicated for use in the treatment of aging signs that require quicker results than those offered by other retinoids used in cosmetics. DDS or Deep delivery system is composed of mainly phospholipids and membrane stabilizers. It contains the right amount of penetration enhancers and edge activators that help the system reach the desired cells.