Not at all, pure human leptin is naturally created in a laboratory through a process called recombinant DNA. This is an FDA approved process for identically and purely replicating human hormones and other cell signaling factors. So there are no plant or animal derived items. That isn't to say some of them can't encourage feeling full or helping reduce cravings. But they do not cover the full spectrum of positive benefits which leptin, as a master hormone can do. Please note that none of them are able to stimulate a leptin response in the brain.