Within solar ultraviolet (UV) light, the longest UVA1 wavelengths, with significant and relatively constant levels all year round and large penetration properties, produce effects in all cutaneous layers. Their effects, mediated by numerous endogenous chromophores, primarily involve the generation of reactive oxygen species (ROS). The resulting oxidative stress is the major mode of action of UVA1, responsible for lipid peroxidation, protein carbonylation, DNA lesions and subsequent intracellular signaling cascades.
Roger Guillemin identified the molecules in the brain that control the production of hormones in…
In 2007, Sinclair wrote the article “Healthy Hair: What is it?” in which he stated,…
We spoke to John Chave, director-general at trade body Cosmetics Europe, about changing regulations, what’s…