L-Citrulline is a powerful pump ingredient, but you'll typically find it in tiny amounts, or combined with L-malate in many products out there... If you see citrulline malate found in a preworkout, it's typically a waste of your money. Our powerful pre-workout packs in 6g of pure L-Citrulline, which would require 12g of citrulline malate in other pre-workouts!

The benefits of creatine are well-documented. It increases lean body mass, strength, performance, and phosphocreatine–an energy source–stores in muscle. The debate is what form of creatine is best. While many companies attempt to reinvent the wheel with new forms of creatine so they can charge you a premium, the overwhelming majority of research showing the benefits of creatine supplementation has been performed with creatine monohydrate. While some other forms may be as effective as creatine monohydrate, no other form has been demonstrated to be more effective than creatine monohydrate.

Alpha-GPC is a choline-containing phospholipid, used to make acetylcholine (a neurotransmitter) and phosphatidylcholine in the brain. Acetylcholine is vital for cognitive function and the communication between neurons. It’s a great preworkout ingredient because it can not only help you improve your focus, but it can also improve your power output, leading to even better workouts.

Most preworkouts are loaded up with caffeine to give you an extra boost, but also that jittery feeling. Flex preworkout is formulated to give you that extra boost without the stimulants that you may be sensitive to.

We pride ourselves on our simple, science-backed ingredients, so you won't find any proprietary blends around here! While many companies will disguise their ingredients inside these "blends" with no exact amounts listed, we want you to know exactly what you're taking, and how much.