Like most other diet pills, Zantrex-3 also hides the exact quantities of ingredients behind a proprietary blend. The consensus from user reviews seems to be that the Zantrex 3 misses out on some powerful weight loss ingredients. The company also had several consumer complaints and a bad history with FDA. Consumers didn't like the side effects linked to Zantrex 3 and that the supplement isn't as effective as claimed. Zantrex-3 misses out on Glucomannan, synephrine etc. We recommend Phen375 and Instant Knockout over this.