I hate poachers and I love animals, but this guy I hard not to love and he does make a good villain. Utterly cruel and psychotic, he loves killing and is greedy. In fact, he's so psychotic that he attempts to feed Cody to the crocodiles when he no longer has use for him.
The first is leptin, which is a hormone secreted by your fat cells that acts as an appetite suppressant. Leptin levels peak when you fill up on food. So, when you eat a lot, your appetite goes away. If you ever said, 'I am so full I couldn't eat another bite,' then in that moment, your body was flooded with leptin.
Leptin is a small, hormone-like protein that is also present in colostrum. It can suppress appetite and is involved in regulating the metabolism of fats. Insulin, which is also found in colostrum, and leptin work together. When insulin is present, mature fat cells (adipocytes) in the body release leptin. It is also believed that the size of the fat cells is a major factor in determining how much leptin will be released, small fat cells release more than large fat cells.