Smartphone device maps Skin's hidden chemistry to personalize cancer treatment

This study aimed to understand the natural levels of a light-sensitive chemical in the skin, which is used in a common treatment for sun damage and some skin cancers. Researchers used a new handheld device to measure this chemical on different body parts of 219 adult volunteers. The goal was to learn how factors like age, skin type, and diet affect these levels, which could help doctors personalize future light therapy treatments to be more effective and comfortable.