The Day You Can “See” Stress With Your Smartphone

What if managing your stress was as simple as snapping a photo? For decades, cortisol—the body’s stress hormone—has been recognized as a central player in human health. It regulates blood pressure, metabolism, immune response, and even sleep cycles. When cortisol is out of balance, the ripple effects touch everything from heart disease to depression. Yet measuring it has always been a cumbersome process, trapped in the world of labs and clinical visits. Now, thanks to a breakthrough in protein design and smartphone integration, that barrier is about to fall.

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