Never heard of it? Let us explain.
Leptin is a hormone that's released by fat cells. It's said to monitor hunger by telling the brain when the body has consumed enough fat and therefore we've eaten enough.
People who are overweight may have become resistant to the hormone which can lead to over-eating. Getting your body back in tune with this hormone makes sure your brain knows when you're full and helps your metabolism work at its optimum level, making it easy to stay in shape.