Adrenolyn Underground is built for lifters who want to feel every ounce of their pre-workout hit. With 350mg of caffeine and a hard-driving blend of high-stim energy plus skin-tight pumps, this formula doesn’t whisper — it roars. Expect a fast surge of power, razor focus, and that gritty underground intensity that keeps you pushing long after everyone else quits. If you want a pre that hits like a freight train and doesn’t let go, Underground is the one you grab.