Informed and honest-with-yourself nutrition and regular exercise. No magic pills, at least none without serious side effects and long-term consequences. There are supplements that MIGHT help but no studies to show for sure, so first, all I've read says nix eating red meat. It will also help to read more about what foods to eat and not eat. Here, I'll help you start: 😉
http://nyti.ms/2xdA624
Who was it who said "You are what you eat"? Well, at least partly so.