Blue Raspberry
Bulk Pre-Workout
Best Seller

Bulk Pre-Workout

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

No Artificial Sweeteners

No Artificial Sweeteners

Gluten-Free and Non-GMO

Gluten-Free and Non-GMO

No Artificial Coloring

No Artificial Coloring

No Artificial Preservatives

No Artificial Preservatives

9 Flavors Available:

Third-Party Testing

We believe trust is earned through transparency. That’s why we provide full access to our third-party test results, so you can feel confident in what you’re taking. View all third-party tests.

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.

Orders in the US over $99 ship free.

Once your order has shipped out from our fulfillment center, you will receive a Shipping Confirmation email. If you selected a tracked shipping method, you will receive your tracking information, along with the necessary steps to track your order, within this email. Please note, orders are generally fulfilled same day or next business day.

Click here for the full shipping and delivery guide »

45 Day Satisfaction Guarantee

If you are not satisfied with your product, we will offer you a full refund or store credit for the value of the item within 45 days of delivery.

Click here for the full refund policy »

why use Bulk Pre-Workout?

Transparent Labs Bulk Pre-Workout is clinically dosed with evidence-based ingredients that support athletic performance and muscle gains.

Elevate Strength and Build Muscle

BULK Pre-Workout is formulated for gym-goers and athletes prioritizing muscle-building and strength gains.

Elevate Strength and Build Muscle

Enhance Focus and Energy

Get dialed in for every workout with hard-hitting nootropics like AlphaSize® alpha-GPC, PurCaf® caffeine, L-tyrosine, and taurine.

Enhance Focus and Energy

Improve Exercise Performance

With beta-alanine and betaine anhydrous, BULK Pre-Workout helps delay muscle fatigue and improve workout performance.

Improve Exercise Performance

Intensify Muscle Pumps

The nitric oxide boosters in BULK Pre-Workout increase blood flow to skeletal muscles to achieve intense muscle pumps every time you hit the gym.

Intensify Muscle Pumps

Key Ingredients

Our formulas are made with clean, natural ingredients, with clinically-validated dosages to support health and performance.

L-Citrulline Malate (2:1)

8,000 mg

L-citrulline is a well-known nitric oxide booster that enhances blood flow, reduces muscle fatigue, and boosts endurance.

L-Citrulline Malate (2:1)

Beta-Alanine

4,000 mg

Beta-alanine is an amino acid that enhances muscular endurance, delays fatigue, and improves performance by increasing muscle carnosine levels.

Beta-Alanine

BetaPure™ Betaine Anhydrous

2,500 mg

Betaine Anhydrous keeps muscle cells hydrated, supports energy production, and boosts muscle endurance, strength, and overall performance.

BetaPure™ Betaine Anhydrous

Taurine

1,300 mg

Taurine is an amino acid, essential to nervous system function and helps prevent fatigue during intense exercise.

Taurine

L-Citrulline Malate (2:1)

8,000 mg

L-Citrulline malate is an amino acid that enhances physical endurance due to its role in the synthesis of nitric oxide (NO) . [1]

When nitric oxide production increases, blood flow improves, allowing nutrients and oxygen to replenish muscle tissue more efficiently. This translates to greater muscle pumps and heightened energy levels.

Numerous studies have demonstrated the performance-enhancing effects of L-citrulline malate such enhancing strength, muscle power output, anaerobic and aerobic capacity [2, 3, 4]

Additionally, studies indicate that L-Citrulline Malate reduces muscle soreness and enhances immune responses during the post-exercise period, supporting recovery from physical training [5].

L-Citrulline Malate (2:1)

Beta-Alanine

4,000 mg

Beta-alanine is an amino acid that functions as a precursor to carnosine, a molecule that accumulates in skeletal muscle tissue, where it plays a crucial role in buffering the acid produced during intense physical exercise. 

Supplementing with Beta-alanine has been shown to increase muscle carnosine levels, which are quickly depleted during intense exercise [6, 7].

Research shows that supplementing with Beta-alanine can significantly improve overall exercise capacity including maximal strength and power output, particularly in exercises requiring sustained maximal effort[8].  strength [9

Beta-alanine supplementation may also increase lean muscle mass [10] and delay the onset of neuromuscular fatigue [11, 12]

Beta-Alanine

BetaPure™ Betaine Anhydrous

2,500 mg

Betaine, also known as trimethylglycine, plays a role in various physiological processes, primarily as an osmolyte (helping cells maintain fluid balance) and a methyl donor (assisting in biochemical reactions). Betaine supplementation has shown promise in improving muscle endurance and enhancing strength and power in trained individuals [13, 14, 15].

While the mechanisms are not fully understood, Betaine supplementation may promote athletic performance through regulating cellular hydration, supporting creatine biosynthesis and playing a role in ATP (energy) production. [16]

BetaPure™ Betaine Anhydrous

Taurine

1,300 mg

Taurine is one of the most well studied performance aids offering diverse benefits for athletes and active individuals. Evidence indicates that adequate taurine levels are pivotal for central nervous system (CNS) function and may help prevent fatigue during arduous exercise. [17]

Taurine has been shown to be effective in enhancing both aerobic and anaerobic performance while also supporting recovery from exercise. [ 18, 19

Several studies have demonstrated that taurine supplementation can help delay time to exhaustion and decrease rate of perceived exertion making it an important ingredient for intense physical activity. [20, 21]

Taurine

L-Tyrosine

1,000 mg

Increasing tyrosine uptake may positively influence neurotransmitter-related psychological functioning. Research shows that supplementing with L-tyrosine can significantly enhance cognitive performance, especially under acutely stressful situations (such as intense training) [22].

L-Tyrosine has also been shown to improve “cognitive flexibility,” meaning it can help you adapt to changing cognitive demands without letting extraneous thoughts take over [23].

L-Tyrosine

AlphaSize® Alpha-GPC

300 mg

Alpha-GPC (L-alpha-glycerylphosphorylcholine) is a cholinergic compound that supports neuromuscular function and physical performance by increasing acetylcholine levels. Studies have shown that supplementation with Alpha-GPC can enhance power output and strength. [24]

Alpha-GPC is primarily found in the brain and is one of the two major storage forms of choline in the cytosol (interior space of cells), along with phosphocholine [25].

Research also suggests that Alpha-GPC may stimulate growth hormone secretion, which plays a role in muscle recovery, fat metabolism, and lean mass development. [26]

AlphaSize® Alpha-GPC

PurCaf® Organic Caffeine

200 mg

While most pre-workouts contain synthetic caffeine anhydrous, we utilize organic caffeine derived from green coffee beans (as PurCaf®). 

Caffeine is a well-documented ergogenic aid that enhances physical and cognitive performance. Research indicates that caffeine improves performance by reducing perceived exertion and delaying fatigue through adenosine receptor antagonism, increasing central nervous system excitability. [27, 28]

Caffeine enhances muscle strength and power output by facilitating calcium mobilization and neuromuscular transmission [29].

PurCaf® Organic Caffeine

L-Theanine

200 mg

L-Theanine is an amino acid found in green tea known for its ability to promote nervous system relaxation without sedation. In the context of athletic performance, it is often combined with caffeine in pre-workout supplements to enhance focus, reduce jitteriness, and improve cognitive function. Research suggests that L-Theanine modulates nervous system function, leading to improved attention, reaction time, and stress reduction—key factors for optimal workout performance. [30, 31]

Additionally, L-theanine has been shown to work in synergy with caffeine to support cognitive function and overall performance [32]. L-theanine may help smooth out the overstimulation sometimes caused by stimulants, preventing energy crashes and promoting sustained mental clarity

L-Theanine

Theobromine

50 mg

Theobromine is the primary alkaloid found in cocoa beans and is chemically related to caffeine, acting as a central nervous system stimulant [33].

Research has found that theobromine has differential contributions to mood and cognitive function compared to caffeine, providing further insight into the distinct yet synergistic nature of these naturally occurring stimulants [34].

Theobromine

SenActiv®

50 mg

The adaptogens that comprise SenActiv® are Panax notoginseng root and rose hips (Rosa roxburghii). The notoginseng in SenActiv® is highly concentrated in notoginsenoside R1, a beneficial compound that helps accelerate muscle recovery during/after intense exercise. 

Likewise, the rose hips provide several ginsenoside-like molecules that provide  synergistic recovery-enhancing effects with ginsenoside R1 [35]. 

These phytonutrients are suggested to work by bolstering a cellular "cleaning" process known as autophagy, particularly in skeletal muscle cells [36, 37, 38].

SenActiv®

BioPerine®

5 mg

BioPerine® is a patented black pepper (Piper nigrum) fruit extract standardized for its piperine content. Piperine is a natural alkaloid known for its “bioenhancer” properties, improving the bioavailability of molecules that are typically poorly absorbed or extensively metabolized in the liver [39, 40].

BioPerine®

Boron Citrate

3 mg

Boron is an important trace mineral with numerous roles in the human body. Recent evidence suggests that men who supplement with boron daily have higher levels of testosterone and lower levels of estradiol (estrogen) than those who don’t [41].

Boron Citrate

Zinc Chelate

10 mg

Chelated zinc is a bioavailable source of zinc, an essential cofactor for various enzymes. Research suggests zinc is crucial for supporting fertility and sperm cell counts in men [42]. This is largely because zinc aids in natural testosterone production, and males who are zinc deficient are at a higher risk of infertility [43].

Zinc Chelate

Vitamins B6 and B12

5 mg and 100 mcg

Vitamins, as a collective group, are essential micronutrients that act as coenzymes (read: "helper molecules") for processes throughout the body. Vitamins B6 and B12 are water-soluble vitamins that are particularly important for cognitive function, cardiovascular health, nutrient metabolism, and immunity [44, 45]. As such, you can't go wrong with having these in your pre-workout arsenal.

Vitamins B6 and B12

Sodium and Potassium

180 mg and 125 mg

Many minerals act as electrolytes in aqueous solutions, meaning they carry an electric charge that influences concentration gradients across cellular membranes and enzyme functions. Sodium and potassium are arguably the most important electrolyte minerals, being well-known to impact hydration status and exercise performance  [46].

Sodium and Potassium

Complete Your Stack

Pair Bulk Pre-Workout with these products for a complete foundational stack.
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Every Ingredient Matters To Make Every Effort Count.

Customer Reviews

Based on 4915 reviews
80%
(3917)
12%
(595)
7%
(328)
1%
(38)
1%
(37)
O
Omar Chavira
Best pre-workout.

This BULK supplement kicks my work out into gear. No kidding. I don't take the full scoop because my work outs are after work and right before bed. But a little bit more than half the scoop is good for me. I've tried most flavors and all are great tasting.

J
Jonghun Baek
Best pre-workout

After trying all different types of pre workouts for two decades, this is the only one tht does not give me any stomache which I care the most.

J
J
No stevia please

This company makes great products. Really sad they started to no longer offer the non flavored version and put stevia in everything instead.

Please bring back the non-flavored versions even if they cost premium. There is a market for people who don’t want to put crap in their body.

The science for stevia just hasn’t fully caught up yet like it was with all those artificial sweeteners. At some time everyone thought aspartame was perfectly safe too.

D
Drew
Always goes bad

Every preworkout I've gotten, bulk and lean, never lasts to the expiration date and I have to throw out half of it because it turns into a clump and is no longer powder

M
Matthew R.
Can't get through it

Good price and the effect is fine. But with the peach mango flavor, I just can't get myself to drink it anymore.

How to Use

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Step 1 - Add Powder

Beginners: To assess your tolerance, add 1/2 scoop (included in the container) of BULK Pre-Workout into a shaker cup with 6-8 ounces of cold water or your preferred beverage. Experienced Users: Add 1 level scoop (included in the container) of BULK Pre-Workout into a shaker cup with 10-12 ounces of cold water or your preferred beverage. If the effects feel subtle, increase to a full scoop before the next workout.
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Step 2 - Mix Thoroughly

Place the lid securely on your shaker cup and shake vigorously until the powder fully dissolves and the mix is smooth.
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Step 3 - Consume

For best results, consume BULK Pre-Workout 20-30 minutes before your workout (ideally on an empty stomach or at least 90 minutes after a meal).
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Step 4 - Use on Training Days

Take BULK Pre-Workout before workouts on days you train.

Disclaimer: This product contains caffeine; do not exceed two servings of BULK Pre-Workout per day, and monitor your caffeine intake from all sources. 

Frequently Asked
Questions

How much caffeine does bulk pre-workout have?

Each serving of Bulk Pre-Workout contains 200 mg of caffeine from organic green coffee beans. This is roughly the amount of caffeine found in two 8-ounce cups of dark coffee.

Can I take Bulk Pre-Workout on non-training days?

Yes, you can take Bulk Pre-Workout on non-training days if you want an energy boost. However, remember that this product contains caffeine and may cause restlessness if taken within 5 hours of bedtime

Can I take Bulk Pre Workout if I am subjected to drug testing for my sport?

Yes, absolutely. Transparent Labs Bulk Pre-Workout contains zero banned substances and is Informed Choice certified for athletes.

What is the difference between Transparent Labs Bulk, Lean, and Stim-Free Pre-Workouts?

Bulk is designed to support lean muscle growth and includes testosterone-supporting micronutrients, while Lean Pre Workout is designed to support fat loss and includes a thyroid support complex. Stim Free Pre Workout, as the name suggests, contains zero stimulants and has added elevATP® for energy production.

Why doesn't Bulk Pre-Workout contain creatine?

Large doses of caffeine may interfere with the ergogenic effects of creatine [34]; since Bulk Pre-Workout contains caffeine, we decided to keep the creatine separate.

How much caffeine does bulk pre-workout have?

Each serving of Bulk Pre-Workout contains 200 mg of caffeine from organic green coffee beans. This is roughly the amount of caffeine found in two 8-ounce cups of dark coffee.

Can I take Bulk Pre-Workout on non-training days?

Yes, you can take Bulk Pre-Workout on non-training days if you want an energy boost. However, remember that this product contains caffeine and may cause restlessness if taken within 5 hours of bedtime

Can I take Bulk Pre Workout if I am subjected to drug testing for my sport?

Yes, absolutely. Transparent Labs Bulk Pre-Workout contains zero banned substances and is Informed Choice certified for athletes.

What is the difference between Transparent Labs Bulk, Lean, and Stim-Free Pre-Workouts?

Bulk is designed to support lean muscle growth and includes testosterone-supporting micronutrients, while Lean Pre Workout is designed to support fat loss and includes a thyroid support complex. Stim Free Pre Workout, as the name suggests, contains zero stimulants and has added elevATP® for energy production.

Why doesn't Bulk Pre-Workout contain creatine?

Large doses of caffeine may interfere with the ergogenic effects of creatine [34]; since Bulk Pre-Workout contains caffeine, we decided to keep the creatine separate.