March 24, 2011
http://www.naturalproductsinsider.com/news/2011/03/carotenoids-and-anti-aging.aspx
BERLIN, Germany—Carotenoids have a reputation for protecting the skin against signs of aging. They serve as antioxidants and as marker substances for the complete antioxidative network of human skin. More recently, it’s become possible to measure the carotenoids non-invasively and online using resonance Raman spectroscopy. This method has been used in various studies to investigate the interaction of carotenoid antioxidants and free radicals in human skin.
A recent German review published in Experimental Biology (March 1, 2011) detailed the results of selected studies. The researchers said: “It could be demonstrated that the carotenoid concentration of the skin reflects the lifestyle of individuals. A high level of carotenoids can be achieved with a healthy diet rich, for instance, in fruit and vegetables. Stress factors such as illness, UV and IR radiation of the sun, and smoking and alcohol consumption reduce the concentration of the carotenoids in the skin. It could be demonstrated that premature skin aging was less in people with a high level of antioxidants in their tissue. Consequently, the furrows and wrinkles were not so deep and dense as in the skin of individuals with a low antioxidant level. The measurements are highly suited for the development of anti-aging strategies and can be efficiently used in the medical diagnostics and therapy control."
This review confirms the need for nutricosmetics as well as the role of carotenoids in anti-aging.