Overall, Leptigen is a good appetite suppressant and thermogenic fat burner. However, the ingredients used are NOTHING new or ground-breaking. Many products in the market offer the same ingredients, while the company behind Leptigen is relatively new and there is lack of credible user reviews online. Besides, Leptigen doesn't have "glucomannan", a very effective fiber ingredient that helps appetite suppression. So, in our opinion, there are better products out there. We recommend Instant Knockout , which has Glucomannan as well as all the ingredients that act as thermogenic metabolic boosters in Leptigen, and provides a better value for money. We also recommend Phen375, which is basically almost same as Leptigen BUT is from a reputed, well established supplement manufacturer and has been in the market since many years.