One of the hardest aspects of sunbathing is knowing when you've had too much UV (ultraviolet) exposure and remembering when to apply your next layer of sun cream. Experts at L'Oréal developed its first commercial sunscreen product in 1935, then furthered its 80-year commitment to sun safety with the unveiling of UV Sense, the first battery-free wearable electronic UV sensor at this year's Consumer Electronics Show.

  Kérastase, a worldwide leader in professional luxury hair care, in partnership with Withings, a leader in the connected health revolution, has announced the Kérastase Hair Coach Powered by Withings — the world’s first-ever smart hairbrush. 

Beauty giant L'Oreal has unveiled a smart skin patch that can track the skin's exposure to harmful UV rays at the technology show CES in Las Vegas. The product will be launched in 16 countries including the UK this summer, and will be available for free. It contains a photosensitive blue dye, which changes colour when exposed to ultraviolet light. By Zoe Kleinman, BBC.