Overview
Transparent Labs Bulk Black is the pinnacle of a clinically dosed pre-workout supplement for stim lovers. If you have experience with our regular Bulk Pre-Workout formula but want some extra "pep" in your step, this is the pre-workout for you. Each scoop of Bulk Black packs over 17 grams of proven nitric oxide boosters, hard-h
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Love the pump, easy on the gut!
I have tried other preworkouts and I have a sensitive stomach so many have gave me issues. TL Bulk and Lean didn't and wanted something stronger and Bulk Black was perfect. I just recently tried a new flavor and wasn't a big fan of it. I reached out to customer service and they were able to replace the tub for me very quickly. And the new flavor is awesome! Try it, its great! And I love how they show you exactly what's in it, nothing hidden! Great stuff!
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Joseph · October 20, 2026
Out of the 10 years I spent in the Army I’ve taken LOTS of pre workouts and I have enjoyed this probably the most out of all others. It’s not a jittery needles poking you kind of feel but a more locked in and focused feeling. My workouts usually last between 2-3 hours and the steady energy stays consistent throughout the workout and even the rest of the day.
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Shelby · October 13, 2026
High stim but not too high. Enough citrulline to actually work. Tingles without feeling like an allergic reaction. Not going to be my daily driver, but the one I take Saturday mornings when I have time to go harder and heavier. This is probably the most well rounded pre I've tried so far without lacking or being overkill in any area. Will buy again.