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• High-stim formula
• Supports strength, muscle pump, stamina, focus, and energy
• Informed Choice certified
• Free of GMOs, gluten, and artificial colors, sweeteners, or flavors
• Blueberry Pomegranate flavor

Bulk Black from Transparent Labs is made for stim lovers. This clinically dosed pre-workout delivers extra “pep” with more than 17 grams of proven nitric oxide boosters, hard-hitting nootropics, natural testosterone-supporting ingredients, and muscle fortifiers—including l-citrulline malate, beta-alanine, betaine anhydrous, and sustained-release caffeine.

Frequently Asked Questions

What is nitric oxide?

Nitric oxide is a vasodilator that promotes blood circulation.

What are nootropics? 

Nootropics are substances that bolster cognitive function by altering levels of certain neurotransmitters, enzymes, or hormones in the brain. 

What is citrulline malate?

Citrulline malate is a precursor to nitric oxide, which increases blood flow to working muscles and promotes greater muscle pumps and heightened energy levels.

What is beta-alanine? 

Beta-alanine is the modified version of the amino acid alanine. The body converts beta-alanine into carnosine, which supports exercise performance and endurance. 

What is betaine? 

Betaine is a naturally occurring amino acid-like compound that supports exercise performance and endurance.

Fuel your workout while it’s happening. Transparent Labs Intra EAA delivers a full spectrum of essential amino acids to support muscle protein synthesis, reduce muscle breakdown, and keep performance high from first rep to last. No fillers, no artificial junk—just clinically dosed EAAs your body actually uses.

• Supports exercise endurance and intensity
• Suitable for everyday fitness enthusiasts and hardcore athletes alike
• 3,000mg of l-arginine alpha-ketoglutarate per serving
• Made in the USA using ingredients that are both foreign and domestic

Arginine alpha-ketoglutarate, or AKG, is used to support nitric oxide production. Nitric oxide promotes vasodilation to increase blood and oxygen circulation throughout the body, allowing you to work out harder for longer periods of time.

If your sights are set on achieving a photo-worthy pump, consider adding The Vitamin Shoppe® brand Arginine AKG tablets to your supplement stack.

• Caffeine-free pre-workout
• Supports strength, stamina, pump, focus, and drive
• Informed Choice certified
• Non-GMO, gluten free, and contains zero artificial colors, sweeteners, or flavors
• Peach Mango flavor

STIM-FREE Pre-Workout from Transparent Labs is a caffeine-free formula designed to promote enhanced strength, stamina, pump, and focus—without jitters or sleep disruptions.

Each scoop delivers science-backed ingredients at clinically validated doses, including 8g of l-citrulline malate, 4g of beta-alanine, and 2.5g of betaine anhydrous.

Frequently Asked Questions

What is citrulline malate?

Citrulline malate is a precursor to nitric oxide, which increases blood flow to working muscles and promotes greater muscle pumps and heightened energy levels.

What is beta-alanine?

Beta-alanine is the modified version of the amino acid alanine. The body converts beta-alanine into carnosine, which supports exercise performance and endurance. 

What is betaine?

Betaine is a naturally occurring amino acid-like compound that supports exercise performance and endurance.