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.
The second type of appetite suppressant is one that stops you from feeling hungry. When taken before a meal they stop pangs by targeting the adrenal gland. The glands release epinephrine and nor-epinephrine, both of which are central nervous system stimulators. These chemicals increase heart rate and blood pressure.