An anonymous reader writes: It's common knowledge that excess sodium can be detrimental to one's health. So researchers in Japan have built a prototype electric fork that uses electrical stimulation to stimulate the taste of salt. The battery-powered fork was engineered and designed at the University of Tokyo's Rekimoto Lab. It features a conductive handle that completes a circuit when the tines make contact with a diner's tongue, electrically stimulating their taste buds. The prototype fork, which was built from just $18 worth of electronics, creates a sensation of both salty and sour, and has adjustable levels of stimulation.