Bestseller

4.69/5.0 4890 Reviews

BULK

ADVANCED PRE-TRAINING FORMULA

Pre-workout supplements—all with virtually identical formulas—are a dime a dozen these days. 

View Ingredient Breakdown

No Artificial Sweeteners

No Artificial Coloring

Gluten-Free and Non-GMO

$49.99
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BULK Pre-Workout

10% off

Pre-workout supplements—all with virtually identical formulas—are a dime a dozen these days. 

As one of the industry’s top-selling pre-workout powders, Transparent Labs Bulk Pre-Workout has separated itself from the competition thanks to a comprehensive, evidence-based lineup of clinically dosed ingredients, fully transparent labeling, and absolutely no artificial color/food dyes, artificial sweeteners, or artificial flavoring.
 

With over 17 grams of active ingredients per scoop, BULK Pre-Workout sets the stage for you to crush it in the gym and pack on lean muscle mass by enhancing muscle strength, blood flow (muscle pumps), endurance, focus, and energy.


Key Features
 

  • Science-Based Pre-Workout Supplement for Increasing Lean Muscle Mass: BULK Pre-Workout is formulated for gym-goers and athletes who prioritize muscle-building and improved physical performance.
     
  • Enhances Strength, Stamina, and Muscle Pumps During Training: With an unmatched blend of clinically dosed nitric oxide boosters and ergogenic aids, BULK Pre-Workout fortifies athletic performance and bolsters blood flow starting from the very first scoop.
     
  • Supports Anabolic Hormone Production: The natural testosterone-supporting ingredients in BULK Pre-Workout provide lasting nutritional support for muscle growth and recovery.
     
  • Promotes Mental acuity, Focus, Drive, and Energy: Get dialed in for every workout with hard-hitting nootropics like AlphaSize® alpha-GPC, PurCaf® caffeine, L-tyrosine, and taurine. 
     
  • Naturally Flavored and Sweetened with Stevia: Most pre-workouts come loaded with artificial colors, sweeteners, or flavors. We know you care about what you put in your body, so BULK Pre-Workout is made with natural flavoring and stevia instead of the hidden junk you find in other pre-workout formulas.
     
  • Third-Party Tested and Certified for Quality: As part of our commitment to industry-leading transparency and quality, every batch of this product is tested by a third-party lab for purity and potency. You can find all of our test results in the footer of our website. This product is also certified by Informed Choice to meet the highest standards for athletes and consumers.

No Artificial Sweeteners

No Artificial Coloring

Gluten-Free and Non-GMO

Customer Reviews

Based on 4890 reviews
80%
(3900)
12%
(593)
7%
(326)
1%
(36)
1%
(35)
M
Michael Morris
Best pre-workout ever

I love this product! I’ve tried so many, and most are ok. This one gives me the most and best smooth energy, and an awesome pump. It’s the only one I use now.

G
Gary Cobe
Love Transparent Labs!

I have now tried the protein powder, pre workout and electrolytes.
Love all of them! Highly recommend!

K
Kevin G
THE gold standard

I've used both the Bulk and Stim Free pre workouts from Transparent Labs for several years now.
It does exactly what I need from a pre workout, nothing more nothing less. Perfect balance of ingredients to get me dialed in, but not jittery.
I'll keep using it as long as they keep making it

E
Elijah Busby

It works great, It takes a little bit to kick in but overall really good. I wasn’t a fan of the flavor I first got originally but I talked to customer support and they were really great and worked with me to get another different flavor.

J
Jesus Ramirez
Fantastic taste

Everything you want in a pre workout with an amazing taste. I highly recommend

Bestseller

Pre-workout supplements—all with virtually identical formulas—are a dime a dozen these days. 

As one of the industry’s top-selling pre-workout powders, Transparent Labs Bulk Pre-Workout has separated itself from the competition thanks to a comprehensive, evidence-based lineup of clinically dosed ingredients, fully transparent labeling, and absolutely no artificial color/food dyes, artificial sweeteners, or artificial flavoring.
 

With over 17 grams of active ingredients per scoop, BULK Pre-Workout sets the stage for you to crush it in the gym and pack on lean muscle mass by enhancing muscle strength, blood flow (muscle pumps), endurance, focus, and energy.


Key Features
 

  • Science-Based Pre-Workout Supplement for Increasing Lean Muscle Mass: BULK Pre-Workout is formulated for gym-goers and athletes who prioritize muscle-building and improved physical performance.
     
  • Enhances Strength, Stamina, and Muscle Pumps During Training: With an unmatched blend of clinically dosed nitric oxide boosters and ergogenic aids, BULK Pre-Workout fortifies athletic performance and bolsters blood flow starting from the very first scoop.
     
  • Supports Anabolic Hormone Production: The natural testosterone-supporting ingredients in BULK Pre-Workout provide lasting nutritional support for muscle growth and recovery.
     
  • Promotes Mental acuity, Focus, Drive, and Energy: Get dialed in for every workout with hard-hitting nootropics like AlphaSize® alpha-GPC, PurCaf® caffeine, L-tyrosine, and taurine. 
     
  • Naturally Flavored and Sweetened with Stevia: Most pre-workouts come loaded with artificial colors, sweeteners, or flavors. We know you care about what you put in your body, so BULK Pre-Workout is made with natural flavoring and stevia instead of the hidden junk you find in other pre-workout formulas.
     
  • Third-Party Tested and Certified for Quality: As part of our commitment to industry-leading transparency and quality, every batch of this product is tested by a third-party lab for purity and potency. You can find all of our test results in the footer of our website. This product is also certified by Informed Choice to meet the highest standards for athletes and consumers.

No Artificial Sweeteners

No Artificial Coloring

Gluten-Free and Non-GMO

Customer Reviews

Based on 4890 reviews
80%
(3900)
12%
(593)
7%
(326)
1%
(36)
1%
(35)
M
Michael Morris
Best pre-workout ever

I love this product! I’ve tried so many, and most are ok. This one gives me the most and best smooth energy, and an awesome pump. It’s the only one I use now.

G
Gary Cobe
Love Transparent Labs!

I have now tried the protein powder, pre workout and electrolytes.
Love all of them! Highly recommend!

K
Kevin G
THE gold standard

I've used both the Bulk and Stim Free pre workouts from Transparent Labs for several years now.
It does exactly what I need from a pre workout, nothing more nothing less. Perfect balance of ingredients to get me dialed in, but not jittery.
I'll keep using it as long as they keep making it

E
Elijah Busby

It works great, It takes a little bit to kick in but overall really good. I wasn’t a fan of the flavor I first got originally but I talked to customer support and they were really great and worked with me to get another different flavor.

J
Jesus Ramirez
Fantastic taste

Everything you want in a pre workout with an amazing taste. I highly recommend

A.
As with most pre-workouts, Bulk is designed with your performance in mind, helping you push harder for longer in the gym. For more insights into how the Bulk Pre-Workout formula actually works, please see the ingredient overviews above.
A.
Each container has 30 servings; for most gym-goers, that will last 30-40 workouts, depending on how large of a scoop you take.
A.
To maximize the effectiveness of Bulk Pre-Workout, aim to finish drinking your dose 15-30 minutes prior to your workout. This should give the product plenty of time to "kick in." In terms of how much water to drink with BULK Pre-Workout, we recommend mixing 6-10 fl. oz of water with 1/2 scoop (to assess tolerance) and mixing 12-16 fl. oz of water with 1 full scoop.
A.
Yes, absolutely. Transparent Labs Bulk Pre-Workout contains zero banned substances and is Informed Choice certified for athletes.
A.
Large doses of caffeine may interfere with the ergogenic effects of creatine [47]; since BULK Pre-Workout contains caffeine, we decided to keep the creatine separate.
A.
Bulk is designed to support lean muscle growth and includes testosterone-supporting micronutrients, while Lean is designed to support fat loss and includes a thyroid support complex. Stim - Free, as the name suggests, contains zero stimulants and has added elevATP® for energy production.
A.
Yes - our fulfillment center allows us to ship worldwide (with some exceptions due to fraudulent activity in certain countries; see here for more info). Standard shipping for international orders typically takes 10-14 business days to arrive.
A.
No! While Transparent Labs Bulk Pre-Workout is manufactured in a facility that processes nuts (coconuts and peanuts), we have an allergen control program that requires sanitization and cleaning of the manufacturing equipment to avoid cross-contamination of allergenic and hypoallergenic materials.

COMPARE PRE-WORKOUT

4.7

Bulk Pre-Workout

  • Improve strength, delay fatigue, trigger growth
  • 200mgcaffeine
  • 8gCitrulline Malate,

    4gBeta-Alinine,

    2.5gBetaine Anhydrous

  • 30Scoops
    (Net Wt.615 - 707g)
Shop from 12 flavors

4.6

lean pre-workout

  • Fat burning and thyroid support complex
  • 180mgcaffeine
  • 6gCitrulline Malate,

    2gBeta-Alinine,

    1.5gBetaine Anhydrous,

    1gAcetyl L-Carnitine

  • 30Scoops
    (Net Wt.492 - 513g)
Shop from 10 flavors

4.5

bulk black pre-workout

  • Additional nootropics, jitter-free formula
  • 275mgcaffeine
  • 8gCitrulline Malate,

    4gBeta-Alinine,

    2.5gBetaine Anhydrous,

    1300mgTaurine,

    1gL-Tyrosine

  • 30Scoops
    (Net Wt.630 - 705g)
Shop from 5 flavors

4.6

stim-free pre-workout

  • Stimulant and caffeine free formula
  • 0mgcaffeine
  • 6gCitrulline Malate,

    4gBeta-Alinine,

    2.5gBetaine Anhydrous,

    1300mgTaurine

  • 30Scoops
    (Net Wt.609 - 702g)
Shop from 8 flavors

4.3

pump pre-workout

  • Stimulant and caffeine free with vasodilating, cell-volumizing nutrients
  • 0mgcaffeine
  • 8gCitrulline Malate,

    2.5gNO3-T®Arginine Nitrate,

    2.5gBetaine Anhydrous

  • 30Scoops
    (Net Wt.597g)
Shop from 2 flavors

Clinically Dosed, All Natural.

Science-Backed Formulas, Clinically Effective Dosages.

No Artificial Sweeteners, Fillers, or Dyes.

3rd-Party Lab Tested.

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