Transparent Labs Stim-Free Pre-Workout -…
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Transparent Labs Stim-Free Pre-Workout -…

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Pre-Workout Supplements

$49.99

$49.99

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Customers say

Customers find the pre-workout supplement effective and caffeine-free, with one noting improved workout quality without affecting sleep. Moreover, the product receives positive feedback for its taste, with one customer mentioning it's not overly sweet. However, several customers report skin irritation, experiencing itching or burning sensations.

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8 customers mention energy, 7 positive, 1 negative

Customers report positive energy benefits from the pre-workout supplement, with individual experiences including increased alertness, focus, and strength during workouts, as well as improved endurance and faster recovery between sets.

…benefit is no caffeine but still noticeable performance support—better endurance and improved workout quality without affecting sleep….Read more

…great with caffeine, this is a great alternative that still makes me want to get up and feel energized. Taste is good too and easy to get down.Read more

…for “stim-free,” it doesn’t have caffeine but it still gives a boost of alertness and focus. It does give me a small itching feeling sometimes(ymmv)….Read more

can’t drink caffeine anymore so this fills that pre workout energy boost and i find i recover faster between sets and coffee never did that for meRead more

8 customers mention taste, 7 positive, 1 negative

Customers like the taste of the pre-workout supplement.

…I'll go back to Genius brand for now until I find a better pump. Tastes great though.Read more

…i feel the itch from the beta alanine. the taste is good. will be buying again!Read more

Very good preworkout. Taste is pretty good….Read more

…Taste is good too and easy to get down.Read more

7 customers mention effectiveness, 6 positive, 1 negative

Customers find the pre-workout supplement works better than most alternatives, with one customer specifically noting its effectiveness for the pump, while another mentions it improves performance for strength training.

…Main benefit is no caffeine but still noticeable performance support—better endurance and improved workout quality without affecting sleep….Read more

…This preworkout works better than most. Has all of the right ingredients.Read more

Seems to work well but the skin tingling is a little much. I also think it’s priced a little higher the. It should be….Read more

Foams really bad. But works ok, I can feel a difference.Read more

6 customers mention quality control, 5 positive, 1 negative

Customers find the pre-workout supplement to be of good quality.

…i finally found something that isnt full of junk and makes my workouts feel like im working hard. i sweat easily which i love….Read more

Love this stuff. So good and can take in the eveningsRead more

As someone who doesn’t do great with caffeine, this is a great alternative that still makes me want to get up and feel energized….Read more

I’ve used a lot that had me shake, but this one was pretty good. There was no shaking….Read more

5 customers mention caffeine-free, 5 positive, 0 negative

Customers appreciate that the pre-workout supplement is caffeine-free, with one customer noting they feel energized without it.

…Main benefit is no caffeine but still noticeable performance support—better endurance and improved workout quality without affecting sleep….Read more

I take half a scoop before working out. It's crazy how I feel energized without caffeine….Read more

Great caffeine alternativeRead more

One of the best caffeine-free pre-workouts out thereRead more

8 customers mention skin irritation, 1 positive, 7 negative

Some customers report skin irritation, including itching, burning, and tingling sensations.

…flavor is very strong one thing to note though is the beta alanine causes an intense itching or burning on the skin for the first few minutes it’s…Read more

Seems to work well but the skin tingling is a little much. I also think it’s priced a little higher the. It should be….Read more

It's supposed to have Beta-Alanine | 4,000 mg. I get major tingles with just 3000 mg. Nothing, and no pump….Read more

…It does give me a small itching feeling sometimes(ymmv). Real reason for 4 stars is the serving scoop….Read more


Foams really badly

2 out of 5 stars

Foams really badly
Foams really bad. But works ok, I can feel a difference.
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Top reviews from the United States

  • Eric Arone

    5 out of 5 stars

    Great caffeine alternative

    Reviewed in the United States on July 18, 2026
    Flavor Name: Blue Raspberry

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    As someone who doesn’t do great with caffeine, this is a great alternative that still makes me want to get up and feel energized. Taste is good too and easy to get down.
    One person found this helpful

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  • William cope

    5 out of 5 stars

    Itching or burning skin

    Reviewed in the United States on April 12, 2026
    Flavor Name: Blue Raspberry

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    Very good hits hard fast flavor is very strong one thing to note though is the beta alanine causes an intense itching or burning on the skin for the first few minutes it’s not something that’s wrong with the product that’s just what it does overall really good product
    4 people found this helpful

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  • F.T.

    5 out of 5 stars

    Solid stim-free option, worth the premium

    Reviewed in the United States on April 28, 2026
    Flavor Name: Blue Raspberry

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    I’ve been using this for over a month and it’s become my go-to pre-workout for afternoon/evening sessions. I train most days and take one scoop ~20–30 minutes before lifting.

    Main benefit is no caffeine but still noticeable performance support—better endurance and improved workout quality without affecting sleep.

    I originally chose Transparent Labs because the ingredients are independently verified and fully disclosed. That matters to me, even if it costs more.

    I’ve also tried Nutricost’s stim-free version. It’s cheaper, but I prefer the taste of this one and trust the ingredient quality more.

    Downside is price, but I ended up putting it on subscription to save a bit since I use it regularly.

    If you want a clean, caffeine-free pre-workout you can use consistently, this has worked really well for me.
    2 people found this helpful

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  • Gabe Patmont

    4 out of 5 stars

    Works well

    Reviewed in the United States on July 12, 2026
    Flavor Name: Blue Raspberry

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    Seems to work well but the skin tingling is a little much. I also think it’s priced a little higher the. It should be. I’ll be looking for discounts if I am getting more.

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  • Djon Watson

    5 out of 5 stars

    Love it

    Reviewed in the United States on June 7, 2026
    Flavor Name: Blue Raspberry

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    I have been looking for a caffeine free preworkout because i ended up in the hospital from all the preworkout i would take on an empty stomach. i finally found something that isnt full of junk and makes my workouts feel like im working hard. i sweat easily which i love. i feel the itch from the beta alanine. the taste is good. will be buying again!
    One person found this helpful

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  • Oliver

    3 out of 5 stars

    Not effective as the KAF-feen version.

    Reviewed in the United States on July 9, 2026
    Flavor Name: Blue Raspberry

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    Not effective as the KAF-feen version.

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  • lee

    5 out of 5 stars

    I prefer it

    Reviewed in the United States on March 31, 2026
    Flavor Name: Blue Raspberry

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    I’ve used a lot that had me shake, but this one was pretty good. There was no shaking. Just a lot of mental focus thankfully not a lot of energy because I’m caffeine intolerant. It’s an awesome pre-workout. It’s very effective for the pump.
    3 people found this helpful

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  • Fulano de tal

    5 out of 5 stars

    Best caffeine-free

    Reviewed in the United States on July 8, 2026
    Flavor Name: Blue Raspberry

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    If caffeine upsets your stomach, this is your solution to squeeze every bit of energy from your muscles without having heartburn after. Tastes better than any other preworkout I've had too, not overly sweet.

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Product Summary: Transparent Labs Stim-Free Pre-Workout – Caffeine & Stim Free Pre Workout Powder for Men and Women with Beta Alanine Powder, Citrulline Malate, & elevATP – 30 Servings, Blue Raspberry

From Transparent Labs
Package Dimensions ‏ : ‎ 6.57 x 4.53 x 4.37 inches; 1.38 pounds
Date First Available ‏ : ‎ February 9, 2024
Manufacturer ‏ : ‎ Transparent Labs
ASIN ‏ : ‎ B0CS3WZTJ2
Best Sellers Rank: #8,266 in Health & Household (See Top 100 in Health & Household) #39 in Sports Nutrition Pre-Workout Powders
Customer Reviews: 4.3 4.3 out of 5 stars (102) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) if (dpAcrHasRegisteredArcLinkClickAction !== true) dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, “allowLinkDefault”: true , function (event) if (window.ue) ); ); P.when(‘A’, ‘cf’).execute(function(A) A.declarative(‘acrStarsLink-click-metrics’, ‘click’, “allowLinkDefault” : true , function(event) if(window.ue) ); );

Stimulant-Free Performance: PreSeries Stim-Free is a stimulant-free pre-workout designed to provide an exceptional workout experience without caffeine. Boost nitric oxide levels, enhance focus, endurance, and promote lean muscle gain without added stimulants. It’s perfect for those who are intolerant to stimulants or looking to cycle off caffeine.
Active Ingredient Powerhouse: Each serving of PreSeries Stim-Free packs over 23 grams per scoop, featuring 13 active ingredients. Citrulline Malate, Beta-Alanine, Betaine, and Taurine at clinically effective dosages are some of the key players here. It’s perfect for those who are intolerant to stimulants or looking to cycle off caffeine.
Citrulline Malate for Muscle Pumps: With a generous dose of Citrulline Malate 2:1 at 8,000 mg, PreSeries Stim-Free promotes increased blood flow and muscle pumps, helping you push your limits and maximize your workouts.
Enhanced Focus and Endurance: The inclusion of L-Tyrosine, Senactiv, elevATP, and Huperzine A in this stimulant-free pre-workout is designed to enhance mental focus, endurance, and overall workout performance.
Full Transparency: Stim-Free comes with a fully transparent label. Meaning you’ll know precisely what ingredients and amounts you’re consuming. With no hidden components, proprietary blends, or artificial additives Stim-Free allows for an informed choice about your pre-workout supplementation.

Transparent Labs Stim-Free Pre-Workout -…
Transparent Labs Stim-Free Pre-Workout -…

$49.99

Buy Now
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