The term “vitamin A”describes the molecule all-trans-retinol(Retinol). More loosely applied, the term is used to refer to set of compounds closely related to Retinol. Collectively Retinol and its derivatives are known as “retinoids”, a term that can be applied to natural or synthetic molecules with vitamin A activity. Retinoids are...

There are two processes that lead to ageing: the internal ageing of the skin, which is largely genetic, and environmentally induced ageing.  Environmental exposure to UV radiation in particular damages skin cells by the photochemical generation of reactive oxygen species that damage nucleic acids, lipids and proteins, including collagen. This...