
Stim-Free Pre Workout
4 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.

Transparent Labs STIM-FREE Pre-Workout provides clinically effective doses of premium, stimulant-free ingredients including Citrulline Malate, Beta-Alanine, Betaine, Taurine, and nootropics to enhance strength, endurance, pumps, and focus. Designed specifically for athletes training later in the day or individuals sensitive to stimulants, this formula supports peak performance without causing jitters or sleep disruption.
Naturally flavored, sweetened with stevia, and free from artificial additives, STIM-FREE Pre-Workout delivers clean energy and exceptional results every workout.

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.
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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.
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why use Stim-Free Pre Workout?
This stimulant-free pre-workout formula enhances athletic performance, promotes muscle pumps, and sharpens mental focus without caffeine or other stimulants.
Boost Strength & Endurance
Clinically dosed ergogenic ingredients to enhance muscle strength, endurance, and power output.

Intensify Muscle Pumps
High-dose Citrulline Malate increases nitric oxide levels, significantly improving blood flow and muscle fullness.

Clean Mental Focus & Energy
Nootropics like L-Tyrosine, Taurine, and Huperzine-A sharpen cognitive performance without stimulant-induced jitters.

Natural & Stimulant-Free Formula
Naturally flavored, sweetened with stevia, and free from artificial ingredients, ideal for evening workouts or stimulant-sensitive individuals.

Key Ingredients
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.

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.

BetaPure™ Betaine Anhydrous
2,500 mg
Betaine Anhydrous keeps muscle cells hydrated, supports energy production, and boosts muscle endurance, strength, and overall performance.

Taurine
1,300 mg
Taurine is an amino acid, essential to nervous system function and helps prevent fatigue during intense exercise.
