Scientists discover hidden brain switch that tells you to stop eating

For years, scientists believed the answer centered almost entirely on neurons, the brain's primary signaling cells. But new research is challenging that idea, pointing to a more complex system involving other types of brain cells.

A study published in the Proceedings of the National Academy of Sciences on April 6, 2026, shows that astrocytes, which have long been considered support cells, may play a much more active role in regulating appetite than previously r...