One of the few Galaxy Watch 8 exclusives is its antioxidant index, which measures nutrients through your skin to determine whether you're eating healthily. I took it personally when Samsung estimated that I had "Low" antioxidants, so I spent the past week eating as healthily as possible to see if it made a difference.
Samsung's multicolored health sensors look for carotenoids, the pigment that gives fruits and veggies their bright red, orange, or yellow coloring; once in your body, they counterbalance the "oxidative stress" generated from poor lifestyle habits like smoking, drinking, overeating, and stress. Hence the name "antioxidants."
