Transparent Labs

Transparent Labs BULK Black

Ranked #1 in Pre-Workouts

911 LP on the category ladder what's LP?

Clinically dosed, fully disclosed, third-party tested, and named best overall by three separate outlets. The most durable ownership story in the category.

Consolidated from 12 cited sources across 7 outlets

Where the cited sources landed, as we read them

11 positive sources
1 mixed source

See the sources

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Pros & cons

✓ Named the strongest pre-workout overall by Fortune's testing panel, citing potency and clinically supported dosages
✓ Rated a full five stars and best pre-workout overall in Forbes Health's lab-tested guide
✓ Named best overall pick in GQ's gym-rat survey
✓ Fully disclosed clinical doses with third-party testing
✓ Brand does not reformulate by stealth, so it holds up year after year

✗ Not the cheapest option
✗ Higher stimulant load makes it harder to live with daily for years
✗ Flagship money for stimulant levels many buyers do not need
✗ Priced like a potency flagship; overkill for most users

The sources behind this ranking

We searched the web and YouTube for what has been published about this product, then read the articles, video transcripts and comments we found.

Evidence 2 articles, 7 video reviews and 3 community sources

11 positive sources

Fortune Christina Snyder · reviewer · Feb 2026

We chose Transparent Labs BULK Black Pre-Workout as our strongest pre-workout overall due to its potency, clinically supported dosage, and multiple flavor options.

Read F FeastGood FeastGood · 13.5K subscribers · Aug 2024

If you are looking for a product that provides long-lasting energy without the feelings of jitteriness while supporting athletic performance and muscle growth, then there is a lot about Bulk Black that you are bound to appreciate.

Watch I Instagram Instagram post

Bulk BLACK by @transparentlabs is the only Pre-Workout I’ve used for the 3 years and it’s the only one I’ll ever use.

View post N Nader from FitFrek Nader from FitFrek · 3.8K subscribers · Feb 2024

Both are unique for their natural ingredients, tailored for athletes who demand the best.

Watch I Instagram Instagram post

Fueled by Bulk Black Preworkout from Transparent Labs. This workout will have your arms and back begging for mercy.

View post N Nader from FitFrek Nader from FitFrek · 3.8K subscribers · Jul 2023

But this might be your new go-to if you're after a clean, high-stim pre-workout that supercharges your workout.

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GQ Ian Burke · reviewer · Feb 2025

The Best Overall: Transparent Labs BULK Black , $55

Read N Nader from FitFrek Nader from FitFrek · 3.8K subscribers · Apr 2024

Find out why Bulk Black could be the ideal pre-workout supplement for you, offering a blend of scientifically backed ingredients designed for maximum performance and clean energy.

Watch N Nader from FitFrek Nader from FitFrek · 3.8K subscribers · Aug 2024

➡️ Bulk Black: Ideal for athletes who prioritize balanced performance, strength, and a formula that supports testosterone production and energy without overstimulation.

Watch N Nader from FitFrek Nader from FitFrek · 3.8K subscribers · Mar 2024

This pre-workout has been revamped with enhanced ingredients for even better performance.

Watch F FK Medicals FK Medicals · 301 subscribers · Nov 2023

Transparent Labs BULK Black is a premium pre-workout supplement designed to boost strength, endurance, focus, and drive during exercise. Each scoop contains over 17 grams of professionally dosed active components and is recommended to be taken before a workout.

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1 mixed source

F Facebook Facebook post

The BULK Black and LEAN formulas are most mentioned, with users noting smooth energy and good pumps, though some say it's overpriced and "mid at best". If you want a stimulant-free option, Transparent Labs also offers a Stim Free pre-workout.

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Frequently asked questions

It ranks #1 of 17 on our pre-workouts tier list, in S tier. That placement draws on 12 cited sources across 7 outlets.

None of the 12 sources with a clear view is critical of it. Not the cheapest option. Higher stimulant load makes it harder to live with daily for years. Flagship money for stimulant levels many buyers do not need. Priced like a potency flagship; overkill for most users.