Modern science is now very much trying to discover the true effect leptin has on fat metabolism, but all the early signs suggest this may be one of the most important things we need to balance if we want to lose weight and keep it off.
This hormone is crucial in body composition as it is in charge of fat regulation. It tells the brain whether or not the body has enough fat stored. The problem here is that as with insulin, our modern diet has mixed up the messages and the brain continues to urge the body to store more fat by slowing down our metabolic rate.
Leptin is a hormone which is manufactured in fat tissue, so the more fat we have the more leptin we produce. Therefore, people who carry more fat will be producing more leptin and in theory the more leptin going to the brain the more fat your body will want to burn.
So why do overweight people struggle to burn fat?
This could well have something to do with Leptin resistance. Your brain is receiving leptin but the door is shut, it no longer has the ability to use it!
Insulin surges are one cause of leptin resistance. Calorie restriction, overeating and alcohol are a few others.