Strawberry Lemonade
Lean Pre-Workout
Best Seller

Lean Pre-Workout

Provides clinical doses of ergogenic ingredients that help you perform your best in the gym while supporting metabolism.

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

8 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.

Are you tired of "cutting pre-workouts" that just don't...cut it? Transparent Labs Lean Pre-Workout is an evidence-based pre-workout formula featuring clinical doses of ergogenic ingredients that help you perform your best in the gym while supporting metabolic and fat-loss efforts. Experience the difference of a true cutting pre-workout formula that gets you dialed in for every training session by enhancing blood flow, strength, endurance, focus, drive, and energy production.


Each ingredient in this pre-workout supplement was chosen based on scientific research and quality characteristics. Like all of our products, Lean Pre-Workout has absolutely no artificial color/food dyes, artificial sweeteners, or artificial flavoring.

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 Lean Pre-Workout?

Transparent Labs Lean Pre-Workout is an evidence-based pre-workout that enhances athletic performance while supporting fat loss.

Improve Strength and Stamina

With a comprehensive lineup of clinically dosed ergogenic ingredients, LEAN Pre-Workout augments athletic performance starting from the very first scoop.

Improve Strength and Stamina

Naturally Boost Energy and Focus

Leave even the most intense workouts in the dust with clean nootropics and energy enhancers like PurCaf® caffeine, theobromine, acetyl-L-carnitine, and choline bitartrate.

Naturally Boost Energy and Focus

Support Body Composition

LEAN helps you get dialed in for every workout while supporting metabolism to burn more fat for energy.

Support Body Composition

Intensify Muscle Pumps

The nitric oxide boosters in LEAN bolster 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

6,000 mg

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

L-Citrulline Malate

Beta-Alanine

2,000 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

1,500 mg

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

BetaPure™ Betaine Anhydrous

Acetyl-L-Carnitine (ALCAR)

1,000 mg

ALCAR provides bioavailable L-carnitine, which is necessary for transporting fatty acids into mitochondria for energy production.

Acetyl-L-Carnitine (ALCAR)

L-Citrulline Malate

6,000 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

Beta-Alanine

2,000 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

1,500 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

Acetyl-L-Carnitine (ALCAR)

1,000 mg

Acetyl-L-carnitine (ALCAR) is a bioavailable form of L-carnitine, an essential molecule for transporting fatty acids across mitochondrial membranes to be used for energy. Acetyl-L-carnitine  is suggested to have diverse ergogenic properties for athletes and gym-goers due to its potent nootropic effects that promote a healthy mood and cognitive function and protect against neurodegeneration [17, 18]. 

ALCAR may also enhance physical performance and target stubborn fat by facilitating fatty acid oxidation [19, 20].

Acetyl-L-Carnitine (ALCAR)

Choline Bitartrate

500 mg

Choline is an essential nutrient that plays a critical role in various physiological processes, particularly in brain development and function. It serves as a precursor to acetylcholine, a neurotransmitter integral to memory, mood regulation, and muscle control. [21]

Choline Bitartrate

PurCaf® Organic Caffeine

180 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. [22, 23]

Caffeine enhances muscle strength and power output by facilitating calcium mobilization and neuromuscular transmission [24].

PurCaf® Organic Caffeine

L-Theanine

180 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. [25, 26]

Additionally, L-theanine has been shown to work in synergy with caffeine to support cognitive function and overall performance [27]. 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 [28].

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 [29].

Theobromine

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].

BioPerine®

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].

Huperzine A

Complete Your Stack

Pair Lean Pre-Workout with these products for a complete foundational stack.
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Boost performance and build lean muscle with Creatine + HMB.
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Clean, grass-fed whey protein isolate with no artificial additives.
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Health & Wellness
Hydrate
Hydrate
Formulated with bioavailable electrolytes to promote optimal hydration.
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Build Muscle & Recover
Strawberry Lemonade
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Plant-based BCAAs plus glutamine for muscle growth, performance, and recovery.
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Every Ingredient Matters To Make Every Effort Count.

Customer Reviews

Based on 2371 reviews
74%
(1764)
14%
(323)
9%
(218)
1%
(29)
2%
(37)
G
Guy Stockton
Just enough get up and go.

Lean has just the right amount of L-Carnitine, L-Theanine and Caffeine to keep me alert through my entire training sessions.

D
Drew
Always goes bad

Every tub I've gotten has gone bad before the expiration date, wasted so much money on this product, done with it

D
Dennis Parker Jr
Real Deal!

This will have you ready for a gym session, long work day or even enhance your daily focus. The Strawberry Lemonade is delicious! I love that’s it made with Stevia

N
Nick Daniels
Woof

Flavor says lemonade but should be called sour chemicals. I tried 3 days, even on a half scoop I got a headache and stomach ache and had to quit on on my 5th set. Never experienced this on any other pre workout

G
Garrett K
Great Pre for a cut

This pre-workout is great on a cut. It has enough stim to give you that boost, but not enough to make you jittery. I felt like I can tell the it was helping with fat burn to some degree. The flavor and taste is great. My only small gripe is the beta-alanine dosage could be higher to at least be a clinical dose.

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 Lean 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 Lean 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 LEAN 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 Lean Pre-Workout before workouts on days you train.

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

Frequently Asked
Questions

How much caffeine does Lean Pre-Workout have?

Each serving of Lean Pre-Workout contains 180 mg of caffeine from organic green coffee beans.

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

Yes, you can take Lean 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 Lean Pre-Workout if I am subjected to drug testing for my sport?

Yes, absolutely. Transparent Labs Lean 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 Lean Pre-Workout contain creatine?

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

How much caffeine does Lean Pre-Workout have?

Each serving of Lean Pre-Workout contains 180 mg of caffeine from organic green coffee beans.

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

Yes, you can take Lean 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 Lean Pre-Workout if I am subjected to drug testing for my sport?

Yes, absolutely. Transparent Labs Lean 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 Lean Pre-Workout contain creatine?

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