Ingredients that are backed by research and shown to help aid in weight loss and appetite suppression are what you'll want to look for when selecting an appetite suppressant. If you're ever in doubt about a certain ingredient, it doesn't hurt to look it up. Here are a few of the more common ingredients used in appetite suppressants: Caffeine Capsicum Garcinia Cambogia Green Tea Extract L-carnitine Chromium Choline Glucomannan L-theanine Vitamin B ComplexKeep in mind, not every product you look at is going to feature all of these ingredients. That doesn't necessarily mean that it won't be as effective.