A computer chip that could be implanted in an obese patient's arm to help weight-loss is being developed by scientists. It would constantly check for fat in the blood and, when someone has eaten too much, release a hormone that stops hunger.
The journal Nature Communications reports that the chip contains two genes that work together to keep appetite in check. The chip's inventor said chips containing other combinations of genes could be developed to tackle other illnesses.
According to the World Health Organization, over half the population in many countries is overweight, one in three people extremely so.