New research conducted by Australian scientists discovered the brain’s off switch for water intake. The researchers were curious how the bran knows when to stop water ingestion. Over consumption of water can result in medicine complications due to salt dilution in the blood which can lead to brain swelling. They used MRI scans to track brain activity in non-thirsty people and the subjects were told to drink water until they were unable to continue. The researchers found that the brain regions involved in emotional decision-making were activated when people drank water after becoming thirsty. The brain signaled the body to stop drinking, which is an important stop mechanism that may prevent complications from excess water drinking.