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Supplement Smarter To Train Harder
Improve your performance and maximize muscle growth with BULK Pre-Workout. Each scoop comes fully loaded with clean, evidence-based ingredients in clinically effective doses, with absolutely no artificial sweeteners, dyes, or fillers.
Improve your performance and maximize muscle growth with BULK Pre-Workout. Each scoop comes fully loaded with clean, evidence-based ingredients in clinically effective doses, with absolutely no artificial sweeteners, dyes, or fillers.

Clinically-Dosed Ingredients

No Artificial Colors or Sweeteners

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Ingredient Labels

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Pre-Workout Ingredients That Actually Work

Pre-Workout Ingredients That Actually Work

8G Citrulline Mallate
The silver bullet of pre-training science, it’s 2x more energy-producing than L-arginine. Count on improved strength, aerobic performance, and muscle endurance.
The silver bullet of pre-training science, it’s 2x more energy-producing than L-arginine. Count on improved strength, aerobic performance, and muscle endurance.

4G Beta Alanine
Unlike others, we don’t skimp here. Get the fully-recommended dose needed to increase cellular carnosine levels.
Unlike others, we don’t skimp here. Get the fully-recommended dose needed to increase cellular carnosine levels.

2.5G BETAINE ANHYDROUS
BetaPure™ Betaine Anhydrous is clinically proven to trigger dramatic muscle growth. All while reducing fatigue and replenishing strength between sets.
BetaPure™ Betaine Anhydrous is clinically proven to trigger dramatic muscle growth. All while reducing fatigue and replenishing strength between sets.

200mg Organic CAFFEINE
While most pre-workouts contain synthetic caffeine anhydrous, we formulated BULK Pre-Workout with organic caffeine derived from green coffee beans (as PurCaf®)
While most pre-workouts contain synthetic caffeine anhydrous, we formulated BULK Pre-Workout with organic caffeine derived from green coffee beans (as PurCaf®)
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5,000+ 5-Star Reviews
BULK Pre-Workout
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• Clinically-dosed ingredients
• Transparent labels
• No artificial sweeteners, fillers, or dyes
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The Real Scoop
Transparent Labs BULK vs. The Others

Paul Sklar - Transparent Labs Athlete
“BULK is a game-changer for me.”
As you get older, and even if you’re younger, if you’re not getting a lot of sleep, you’ve got family—I’ve got 5 kids—If you’ve got all these stressors, you may lack energy before a workout.
I used to be able to get up no matter what before a workout, but as I’ve gotten older, and since I’ve tried BULK—it’s a game changer for me. The energy burst that I get is steady, and I get a phenomenal pump.
The best time to take it is about 20-30 minutes before a workout. Let it settle in, start to feel it, and you’re ready to go.
Your Questions,
Answered
What does Bulk pre-workout do?
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.
How long does Bulk pre-workout last for?
How should Bulk be taken to maximize its effectiveness?
Can I take Bulk pre-workout if I'm subjected to drug testing for my sport?
Why doesn't Bulk pre-workout contain creatine?
What is the difference between Transparent Labs Bulk, Lean, and Stim-Free pre-workout?
I don't live in the United States, can I still buy Bulk?
Does this product contain nuts?