Spending time in the sun is a double-edged sword: It is the best source of Vitamin D but too much sun worshipping can burn you. That’s a problem French cosmetics and beauty giant L’Oreal is trying to solve. L’Oreal has developed a stretchable skin sensor designed to monitor ultraviolet light exposure via a wearable it is calling My UV Patch. The technology, currently in beta form, will roll out more widely later in 2016 under L’Oreal’s dermatological skincare brand, La Roche-Posay.
Here’s how it works: the patch is a transparent adhesive that measures just one square inch in area and half the thickness of an average strand of hair. It contains photosensitive dyes that can detect changing skin tone colors when exposed to UV rays. Users can take a picture of the patch and upload it to a mobile app that will analyze the dye squares to determine how much UV exposure the wearer has received.
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