In just seconds, Prysm iO™ measures carotenoid levels in your skin—a trusted biomarker correlated with healthy aging. Carotenoids are powerful antioxidants that help defend your body from oxidative stress and free radical damage, two of the biggest drivers of aging. By showing you your real-time Prysm score, Prysm iO takes you from uncertainty to confidence, giving you simple, science-backed insights you can act on every day. Backed by 20+ years of antioxidant research and patent-pending technology, Prysm iO makes it easy to know your body is getting the protection it needs to look and feel its best.