British scientists are currently developing a special baby milk as the latest weapon in the fight against obesity. The special milk which contains the hormone leptin (found in breast milk) works by suppressing hunger and is designed to prevent children from growing into overweight adults. Scientists say if the milk is given to babies, it can programme the brain to prevent overeating in later life. They argue that putting leptin in the milk is simply adding something that is already present in breast milk but not in formula feeds. Extensive studies have already been carried out on rats with successful results. However many scientists are sceptical as to whether the special milk will work on humans, whilst others are worried about potential health risks.