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Stim-Free Pre-Workout

Stim-Free Pre-Workout

Clinically dosed, stimulant-free pre-workout formula to boost strength, endurance, and blood flow without jitters—ideal for evening workouts.

No Artificial Sweeteners
No Artificial Coloring
No Artificial Preservatives
9 Flavors Available:
 

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Stim-Free Pre-Workout + Free Variety Pack

Stim-Free Pre-Workout + Free Variety Pack

Includes 6 Pre-Workout Stick Packs: 2x Bulk, 2x Bulk Black, 1x Lean, and 1x Stim-Free

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Free Variety Pack Unlocked


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Stim-Free Pre-Workout

Stim-Free Pre-Workout

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.

 
Strawberry Lemonade
 

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 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

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.

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.

L-Tyrosine

1,000 mg
L-tyrosine is an amino acid that serves as a precursor to dopamine and norepinephrine.

SenActiv®

50 mg
SenActiv® is a patented adaptogenic complex that helps accelerate muscle recovery during/after intense exercise.

ElevATP®

150 mg
elevATP® stimulates your body’s endogenous production of adenosine triphosphate (ATP), the veritable energetic currency of cells

BioPerine®

5 mg
BioPerine® is a standardized extract of black pepper fruit enriched with piperine, a compound that helps your body absorb and utilize active ingredients.

Huperzine-A

100 mcg
Huperzine-A is a natural nootropic that improves cognitive function by reducing the breakdown of acetylcholine.

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].

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]

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]

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]

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].

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 [24]. 

These phytonutrients are suggested to work by bolstering a cellular "cleaning" process known as autophagy, particularly in skeletal muscle cells [25, 26, 27].

ElevATP®

150 mg

ElevATP® is a clinically researched combination of  “ancient peat” (fossilized plants) and apple skin extracts. Using innovative biotechnology, elevATP® stimulates your body’s endogenous production of adenosine triphosphate (ATP), the veritable energetic currency of cells.

By boosting ATP production, ElevATP® can help promote athletic performance (e.g. max strength) and improve body composition [28, 29]. ElevATP® is also a fast-acting ATP booster that starts working from the very first dose [30].

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 [30, 31]. 

Huperzine-A

100 mcg

This natural nootropic is known for inhibiting acetylcholinesterase, thereby increasing acetylcholine levels, a neurotransmitter vital for learning and memory. 

A recent research review contends that huperzine-A, a constituent of the Chinese folk medicine Huperzia serrata, is a good  candidate to improve cognitive function and may help boost memory [32]. 

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  • Gives me everything I need to crush my late-evening workouts without wrecking my sleep.
  • Tastes good, clean energy, no crash, no jitters. Highly recommend this quality product.
  • You will get great pumps that will last for a long time and more endurance while working out.
  • 5 stars: 1111 (78%)
  • 4 stars: 185 (13%)
  • 3 stars: 99 (7%)
  • 2 stars: 21 (1%)
  • 1 star: 14 (1%)
A
Asif H.
Peach Mango
Amazing product. Good muscle pumps more energy

It has been a week using this product and i love it. I get good pumps and helps me with better muscle mind connection. I have noticed more energy that is helping me stack more weight to acheive my goal faster. I would highly recommend this product. I got the peach mango flavor and its amazing.

R
RKHJ
Highly recommend

Best product I’ve used in years. With this product, change in diet, I was able to lose 30 pounds, gain muscle mass and strength in 4 months and am in the best shape ever…at 53 years old.

A
Anthony M.
Good stuff!

I like the flavor. I also have Mango Peach and Strawberry/Lemonade at home. There is a tartness about them, which I like. It has that green apple effect. I just started to stack so we'll see how it works. So far, I like the feeling and the gains keep coming.

A
Alberto

Very good! If this is your first time using a pre workout just know that your lips WILL TINGLE almost itchy but this is normal and will even feel pins and needles around your body thats normal. I was freaking out lol. It helped me stay energized and i did notice that I pushed myself more than normal and ghe Blue-Raspberry flavor is really good

D
David

Hate the beta alanine feeling. Pump product is better

C
Carl

Fantastic

K
Kevin

Fast delivery

J
John S.
White Cherry
priced a little higher than other pre workouts

priced a little higher than other pre workouts but worth the little extra

R
Ryan M.
Peach Mango
Witchcraft-Level Performance Without the Caffeine Crash

The Transparent Labs Stim-Free Pre-Workout is nothing short of amazing. It genuinely feels like witchcraft — giving me everything I need to crush my late‑evening workouts without wrecking my sleep. The energy, focus, and endurance feel clean and steady, and there’s zero stimulant buzz or jittery nonsense. Just pure performance.I’ve tried a lot of pre‑workouts, but this one stands out because it actually delivers on its promise: real workout fuel, no caffeine, no compromise. If you train at night or just want a stim break, this is the one.

C
Courtney W.
Tropical Punch
Orange Pineapple delicious!

Love the orange pineapple flavor! Also love the stim without the caffeine!

A
Anonymous
Tropical Punch
I have been using the stim-free 2ish months

I have been using the stim-free formula for 2ish months to help reduce my daily caffeine intake. Take it about 20-30 mins before an after work CrossFit workout and by time I’m warming up I can feel the effects of the drink.

C
Carlos

Clean supps

B
Brandon
Amazing!

Tastes decent and it’s turned my workouts from “Man, this sucks” to “I’m about to crush this lift and then go fight a gorilla!” And I love that it’s caffeine free. I’m super sensitive to caffeine so this is perfect for me - I get the boost I want without feeling like I’m gonna have a panic attack. Highly recommend.

M
M.M.

Love the taste!

C
Carlos D.
White Cherry
Really pumps you

Really pumps you up

A
Anonymous
Blue Raspberry
No overstimulation!

Just enough stimulation to have a solid workout.

K
Kiarash

Amazing. It could be even beyond this if was a bit lesser sweet. Like 20-30% lesser than now. Otherwise, delicious, and effective!

R
Rebecca

I've always loved this Non-Stim. gives a great pump & energy for my entire workout to keep me going.

J
Jerod G.
Strawberry Lemonade
Stem free is really good I just want more or

Stim free, is really good I just want more or greater discounts from you guys. I'm going to order more, I'm sticking with you guys transparent labs. I like the company I researched your product I like your transparency what products. Just what I need, glad to do business with you keep it coming. Good job guys.

C
Clinton M.
White Cherry
Go for it

Only used twice.

The white cherry flavour , very strong.
I need to have a pint of water with it or it's too strong and sweet.

The product itself is amazing 20 mins and I'm ready to go.
I still get the scratches but it is the best pre-workout I've had anywhere.

I'm at the point I can't wait to go again so I can use it.

Highly recommend.

C
Cody

Tastes good, clean energy, no crash, no jitters. Highly recommend this quality product.

C
Caleb

White cherry flavor is amazing

S
Steven

Best pre workout 💯

R
Ryan
Highly recommend - still had the tingley feeling

Highly recommend - still had the tingly feeling which sucks but no caffeine and the pumps we're fantastic. I'll never workout without it again.

R
R.R.

Hands down one the best prework sups there is, no jitters or crash.

B
Brett

Tastes great works great

J
J.N.

Amazing for late workouts, peach mango tasts wayyy better then blue razz, i love this stuff

T
Tim

Love this all the go without the jitters

M
Mark

Works well, great pump with no stim. Tastes great. Love the transparency on ingredients.

Y
Youssef

Great taste and efficacy

How To Use

1

Step 1 - Add Powder

Beginners: To assess your tolerance, add 1/2 scoop (included in the container) of Stim Free 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 STIM-FREE 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.
 
2

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.
 
3

Step 3 - Consume

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

Step 4 - Use on Training Days

Take Stim Free Pre-Workout before workouts on days you train.

Frequently Asked Questions

Choosing between stim-free and stim-based pre-workout depends on your personal needs and tolerance for stimulants, notably caffeine. Many people admittedly love the jolt of wakefulness and increased vigilance that caffeine provides, and are more likely to perform well in the gym because of that. Obviously, the psychotropic rush you feel after taking a stim-based pre-workout will not be as apparent when taking a non-stim pre-workout. But if you work out later in the day, a stimulant-free pre-workout may be the better option so it doesn't interfere with your sleep.

 

Yes, it's safe to take our non-stim pre-workout daily as long as you adhere to recommended dosages. Our product is formulated with safe levels of each ingredient and is free from harmful additives, ensuring consistent performance benefits.

 

No, this formula contains 100% non-stimulant ingredients and won't cause restlessness.

 

It sure can; the ingredients in our Stim-Free Pre-Workout can help you train harder and longer, resulting in enhanced muscle gains (assuming you're eating a proper muscle-building diet).

 

Our stim-free pre-workout is designed to increase power and endurance by improving blood flow and supporting muscle growth and recovery. It's ideal for those who train in the afternoon or evening or are sensitive to caffeine/stimulants.

 

Transparent Labs Bulk Pre Workout 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 while the Stim Free pre workout, as the name suggests, contains zero stimulants and has added elevATP® for energy production.

Is a stim-free pre-workout better than a stim-based pre-workout?

Choosing between stim-free and stim-based pre-workout depends on your personal needs and tolerance for stimulants, notably caffeine. Many people admittedly love the jolt of wakefulness and increased vigilance that caffeine provides, and are more likely to perform well in the gym because of that. Obviously, the psychotropic rush you feel after taking a stim-based pre-workout will not be as apparent when taking a non-stim pre-workout. But if you work out later in the day, a stimulant-free pre-workout may be the better option so it doesn't interfere with your sleep.

Can you take stim-free pre-workout every day?

Yes, it's safe to take our non-stim pre-workout daily as long as you adhere to recommended dosages. Our product is formulated with safe levels of each ingredient and is free from harmful additives, ensuring consistent performance benefits.

Will stim-free pre-workout keep me up at night?

No, this formula contains 100% non-stimulant ingredients and won't cause restlessness.

Does non-stim pre-workout help build muscle?

It sure can; the ingredients in our Stim-Free Pre-Workout can help you train harder and longer, resulting in enhanced muscle gains (assuming you're eating a proper muscle-building diet).

What is stim-free pre-workout used for?

Our stim-free pre-workout is designed to increase power and endurance by improving blood flow and supporting muscle growth and recovery. It's ideal for those who train in the afternoon or evening or are sensitive to caffeine/stimulants.

What is the difference between transparent labs bulk, lean, and stim-free pre-workouts?

Transparent Labs Bulk Pre Workout 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 while the Stim Free pre workout, as the name suggests, contains zero stimulants and has added elevATP® for energy production.