Bestseller

4.65/5.0 1393 Reviews

STIM-FREE

NON CAFFEINATED PERFORMANCE FORMULA

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 enhanc... View Ingredient Breakdown

No Artificial Sweeteners

No Artificial Coloring

Gluten-Free and Non-GMO

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Stim-Free Pre Workout

10% off

Customer Reviews

Based on 1393 reviews
78%
(1080)
13%
(180)
7%
(99)
2%
(21)
1%
(13)
K
Kolby P.
Transparent Labs Stim-Free Pre-Workout Review: Cranked Up Without the Crack

I’ve tried a lot of pre-workouts over the years—some good, some bad, and some that make you feel like you’ve just mainlined lightning. Transparent Labs’ Stim-Free version falls somewhere in between, but not without some caveats. Let’s just say, if you’ve ever wondered what it feels like to be a Tesla coil in human form, this might get you close.

When I take this stuff, my skin feels like it’s short-circuiting. There's a weird electric buzz that makes me feel borderline methed out, which is ironic given the “stim-free” label. It’s an intense ride, and while I assume their main customer base is 16 to 30-year-olds chasing that cracked-out gym rat euphoria, that’s not everyone’s vibe.

Now here’s the kicker: I’m 40. I’m not looking to bench press the moon or chew drywall. I’m looking for clean energy, vascularity, and a solid pump without feeling like my soul is vibrating. That’s why I loved their now-discontinued product, Pump. It was everything a stim-free pre-workout should be—effective vasodilation, great muscle pump, and smooth, consistent energy that made workouts feel powerful but focused. No jitters, no tingling, just results.

TLDR: If you’re younger, chasing the stim dragon, or want to feel like you’ve plugged your nervous system into a car battery, Transparent Labs Stim-Free might be your jam. If you’re like me and want something a little more balanced and sustainable, Pump was the golden era—and its absence is felt.

J
Justin Keiser
Good, Not Outstanding like the one before Stim Free

You need to put the other one back in stock. This just isn't good enough as the one you stopped making before this one. I had way more energy with the other one. BRING IT BACK IN STOCK! Some of us Combat Vets need a good head rush with our workouts.

B
Brandon Smith
Exceeded expectations

Decided to cut caffeine out and bought a tub of the srim free pre workout. It exceeded my expectations. Love the beta alanine and the energy/pump I get even without the caffeine. Bought a second tub.

D
Don
"Natural Flavors"

I've been using TL's "Bulk" since 2018 and I've now just recently tried the Stim-Free; it never occurred to me they use "natural flavors" until recently.

This is easily the most fraudulent ingredient around, and can be comprised of many, many other ingredients. Not only is this inclusion not "transparent" at all--but is likely unclean.

TL has been incredible, generally, with their products, but this is disappointing. Maybe an explanation is found somewhere detailing what they mean by natural flavors? If they ever revamped this ingredient and made it actually transparent and clean, I'd think the positive buzz might make it worthwhile.

I'm not quite sure what to do about this product now. Very conflicting. TL, if you read this: please consider explaining this or revamping your ingredients.

S
Shanice
Taste good, works good, no crash

This stuff works. Makes me itchy which can be annoying but my workouts are so much better

Bestseller

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.

No Artificial Sweeteners

No Artificial Coloring

Gluten-Free and Non-GMO

Customer Reviews

Based on 1393 reviews
78%
(1080)
13%
(180)
7%
(99)
2%
(21)
1%
(13)
K
Kolby P.
Transparent Labs Stim-Free Pre-Workout Review: Cranked Up Without the Crack

I’ve tried a lot of pre-workouts over the years—some good, some bad, and some that make you feel like you’ve just mainlined lightning. Transparent Labs’ Stim-Free version falls somewhere in between, but not without some caveats. Let’s just say, if you’ve ever wondered what it feels like to be a Tesla coil in human form, this might get you close.

When I take this stuff, my skin feels like it’s short-circuiting. There's a weird electric buzz that makes me feel borderline methed out, which is ironic given the “stim-free” label. It’s an intense ride, and while I assume their main customer base is 16 to 30-year-olds chasing that cracked-out gym rat euphoria, that’s not everyone’s vibe.

Now here’s the kicker: I’m 40. I’m not looking to bench press the moon or chew drywall. I’m looking for clean energy, vascularity, and a solid pump without feeling like my soul is vibrating. That’s why I loved their now-discontinued product, Pump. It was everything a stim-free pre-workout should be—effective vasodilation, great muscle pump, and smooth, consistent energy that made workouts feel powerful but focused. No jitters, no tingling, just results.

TLDR: If you’re younger, chasing the stim dragon, or want to feel like you’ve plugged your nervous system into a car battery, Transparent Labs Stim-Free might be your jam. If you’re like me and want something a little more balanced and sustainable, Pump was the golden era—and its absence is felt.

J
Justin Keiser
Good, Not Outstanding like the one before Stim Free

You need to put the other one back in stock. This just isn't good enough as the one you stopped making before this one. I had way more energy with the other one. BRING IT BACK IN STOCK! Some of us Combat Vets need a good head rush with our workouts.

B
Brandon Smith
Exceeded expectations

Decided to cut caffeine out and bought a tub of the srim free pre workout. It exceeded my expectations. Love the beta alanine and the energy/pump I get even without the caffeine. Bought a second tub.

D
Don
"Natural Flavors"

I've been using TL's "Bulk" since 2018 and I've now just recently tried the Stim-Free; it never occurred to me they use "natural flavors" until recently.

This is easily the most fraudulent ingredient around, and can be comprised of many, many other ingredients. Not only is this inclusion not "transparent" at all--but is likely unclean.

TL has been incredible, generally, with their products, but this is disappointing. Maybe an explanation is found somewhere detailing what they mean by natural flavors? If they ever revamped this ingredient and made it actually transparent and clean, I'd think the positive buzz might make it worthwhile.

I'm not quite sure what to do about this product now. Very conflicting. TL, if you read this: please consider explaining this or revamping your ingredients.

S
Shanice
Taste good, works good, no crash

This stuff works. Makes me itchy which can be annoying but my workouts are so much better

Clinically Dosed, All Natural.

Science-Backed Formulas, Clinically Effective Dosages.

No Artificial Sweeteners, Fillers, or Dyes.

3rd-Party Lab Tested.

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