Forget Blood—Your Skin Might Know If You’re Sick

WIRED

This glowing microneedle test could catalyze a transition from blood-based diagnostics to a stick-on patch.

A RIVER OF biological information flows just beneath the outermost layers of your skin, in which a hodgepodge of proteins squeeze past each other through the interstitial fluid surrounding your cells. This “interstitium” is an expansive and structured space, making it, to some, a newfound “organ.” But its wealth of biomarkers for conditions like tuberculosis, heart attacks, and cancer has attracted growing attention from researchers looking to upend reliance on diagnostic tools they say are inefficient, invasive, and blood-centric.

Read the full story in WIRED

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