Need doctor's help! what can you tell me about leptin?

Fat distribution ;: Metabolism leptin is involved , as in starvation , produced by fat cells , its fine balance help deposition ; distribution . So many products are on market with premise will loose weight by its use , but lacks scientific support .Only way to loose wt is by eating less , healthy diet , exercises ( daily ) , more time in gym less time as couch potato. To burn 1 lb of fat you need to burn 3500 cal.