“…In recent years, several wearable devices to gather the body’s physiological data have been proposed by the scientific literature, especially targeting personalized medicine and point-of-care diagnostics [ 29 ], as well as home and fitness monitoring. Wearable monitoring is provided by shirts [ 30 ], necklaces [ 31 ], tattoos [ 32 ], lenses [ 33 ], headbands [ 34 ], smart wristbands [ 35 ], watches [ 36 ], shoes [ 37 ], eyeglasses [ 38 , 39 ], wristbands, and patches [ 40 , 41 ]. Different kinds of wearable sensors perform clinical diagnostics by measuring the major electrolytes, metabolites, ions, acids, heavy metals, alcohols, and toxic gases directly acquired in different body fluids [ 25 , 42 ], as shown in Figure 1 .…”