Almost all of the pre-workout shit has mostly caffeine and vitamin b3. Maybe a small amount of alanine, arginine, creatine and yohimbe. If it says "proprietary blend" guess what........you have no idea how much of each substance you are getting. You are getting ripped off. If the company was honest, they would list how much of each ingredient you are getting. By the way, b3 is niacin and makes you blush and itch. You are better off taking a vivarin (or 2 cups coffee), bronk aid and an aspirin. Suckers.