Rule 1 R1 Citrulline

There is a distinction worth knowing here. Most pre-workouts use citrulline malate, which is citrulline bound to malic acid - so a gram of it delivers noticeably less actual citrulline than a gram of the pure form. R1 Citrulline is the pure form.

Citrulline converts to arginine in the body, which converts to nitric oxide, which widens blood vessels and improves circulation. That is the mechanism behind a pump, and behind better oxygen and nutrient delivery to working muscle. Rule 1 keep it to the single ingredient with no fillers, which is what makes it useful for building your own stack at the dose you want.

The 198G tub holds 60 servings, mixed into 8 to 12oz of liquid before or during training.

It is unflavoured, so it stirs into a pre-workout or a shake you already take without changing the taste.