Sweat sensors

     Unlike Fitbit and the Apple watch that does not provide user's health on a molecular level, smart wristbands and headbands embedded with swear sensors could sync data wirelessly in real time to smartphones using Bluetooth.
     This technology is useful because sodium and potassium in sweat could help check for problems such as dehydration and muscle cramps. Glucose can keep track of blood sugar levels. Lactate levels can keep track of blood flow problems and skin temperatures.