A gentle zap to the neck made people eat 9.6% less and 23.6% slower.

Overeating is a common health issue, even for people without eating disorders. The vagus nervevagus nerveA long nerve that runs from the brain down through the neck and chest to the gut, carrying signals that help control digestion and appetite. connects the gut and the brain, and past implants that stimulate this nerve have helped reduce appetite. Researchers tested whether a simple, non-invasive method could help in real time. They tested a mobile, handheld device that sends electrical pulses through the skin of the neck during distracted snacking. The device works by mildly stimulating the vagus nerve without needing surgery. People who received this stimulation ate 9.6% less and ate 23.6% more slowly than when they received a fake, sham stimulationsham stimulationA fake or inactive version of the treatment used as a comparison, so any effect is not just from the ritual of using a device.. They felt just as full afterward, their heart rate was lower, and they described the feeling as subtle and barely noticeable.

Why it matters

Anyone who overeats or eats emotionally, even without a diagnosis, could one day use a small neck device that quietly slows eating in the moment. Because the stimulation is subtle and hands-free, it could fit into daily life as an automatic intervention, unlike diets that demand constant attention. This is early evidence, not a treatment, but it points toward a new way to intervene.

Questions answered