Transparent Labs Pump Review: Is This Stim-Free Pre-Workout Worth Trying?

by Nader Qudimat
Updated June 5, 2023
Pre Workout
Serving Size
Easily obtainable
Big dose of citrulline 
Huge nitric oxide boosting doses
30 full servings

Bottom Line

One of the best parts of the gym is the pump, as you'd probably agree. 

Transparent Labs Pump is a near masterpiece of a nitric oxide supplement that does one thing and only one thing, very well. 

It enhances the pump and improves performance. 

With a mix of citrulline, nitrates, betaine anhydrous, and much more, it's designed to create the best experience for muscle volumization and pumps. 

And because it doesn't have stimulants, it can be combined with your favorite pre workout

Or it can be used as a solo pump supplement as a way to take a break from stimulants.

Use discount code FITFREK to save a bit.


For years now, Transparent Labs have been creating completely disclosed supplements.

They were one of the first to go fully naked on labels. 

Transparent Labs discloses everything from the ingredients to the flavoring and they are safe to use for drug-tested sports. 

They've created themselves with quite a reputation for clear but effective supplements. 

Pump is no different. 

Transparent Labs Pump is a pre-workout supplement designed to enhance your workouts by boosting nitric oxide levels, blood flow, and nutrient delivery to your muscles.

What sets it apart is its stimulant-free formula, making it a great choice for those who want to avoid caffeine or other stimulants.

We'll cover my review and then dig into the ingredients...

Recommended: Nitric Oxide Pills by Transparent Labs

My Review

I've taken quite a few pump focused supplements, many of them varied in formula's.

But there was almost always some citrulline along with agmatine. 

Transparent Labs Pump is a little different though. 

It has a huge dose of citrulline at 8 grams, along with 2.5g arginine nitrate, 2.5g betaine anhydrous, l-tyrosine, l-glutathione, and Astragin. 

the maximum dose used in studies is 10 grams, and anything more than that doesn't get any better. 

So I'd take this on an empty stomach, as with any pre workout, and then workout an hour or so later. 

Before I'd lift any weights, I'd already feel solid. 

My arms felt tighter, some veins were popping out more, and I felt prime and ready for lifting weights. 

After a few sets, it already felt like I had a great pump on.

The pump would be what I would feel after an hour of working out without using TL's Pump.

It got better when I used it on days when I had arms and chest. 

I'd see more veins in places where I haven't seen them in a while like my shoulders and chest. 

If I was at a leaner body weight then I'd definitely see much more of them.  

The performance and endurance boost were also incredible. 

It felt much easier to recover between sets quicker. 

Also, I felt less sore the next day, and still looked full and pumped. 

The video review can be found here or look below:


The ingredients in Pump are properly dosed and it's a short formula, but very effective.

Every scoop packs 20 grams and there are 30 servings, making it one of the most effective for its value. 

The doses are also generous, with nothing underdosed.

With 8 grams of citrulline, nitrates, betaine anhydrous, tyrosine, l-glutathione, and Astragin. 

Pump is one of the few supplements with 8 grams of citrulline per serving. 

That's huge. 

And not to mention there are high-quality sources of minerals, like sodium (from Himalayan rock salt) and Calcium (from BioFolate). 

This ensures a solid foundation for optimal vasodilation and pumps

Here's a quick rundown of the key ingredients in Transparent Labs Pump and their benefits:

  • Citrulline: Boosts nitric oxide production, enhancing blood flow to your muscles during workouts. This can lead to better performance and impressive muscle pumps.

  • Arginine Nitrate: A potent nitric oxide booster that helps improve blood flow, leading to better nutrient delivery to your muscles and enhanced muscle pumps.

  • Betanine Anhydrous: Known for its ability to enhance power output and physical performance.

  • Tyrosine: This plays a crucial role in the production of dopamine and adrenaline, helping you stay focused and motivated during your workouts.

  • AstraGin: A patented compound that enhances the absorption of other ingredients, making the formula more effective.

Remember, while these ingredients have been shown to have certain benefits, individual results may vary. Always consult with a healthcare provider before starting any new supplement regimen.

Citrulline (8g)

Without citrulline, there isn't a complete pump supplement

It's one of the staple ingredients if a pre workout promises pumps and performance enhancements. 

Containing a huge dose of 8 grams, Transparent Labs has included this powerhouse of a nitric oxide booster.

Citrulline is the key to increasing l-arginine in the body, which increases N.O. synthase to increase vasodilation, widening blood vessels, which leads to more blood flow and nutrient delivery. [1]

More vasodilation means more blood flow, and this will deliver intense pumps.

It also comes with benefits for performance as well. 

Citrulline can clean up the ammonia build up that occurs from high volume workouts. [2]

An increase in ammonia levels means muscular fatigue and can be an issue for metabolic and neurologic processes. [3]

Arginine also plays a role in removing ammonia from the body, assisting the body with keeping it prime and optimal for energy. 

Citrulline has been proven time and time again to be much more superior to arginine as it is much more bioavailable while arginine is destroyed by the gastrointestinal tract far too quickly. [4]

And of course, there's a huge 8 gram dose here, much higher than most pump supplements and even pre workouts. 

Pump is already off to a great start with a proper dose of citrulline to help optimize performance and pumps. 

Arginine Nitrate (as NO3-T®, 2.5g)

Although we know arginine on it's own is near useless, arginine nitrate is still benefical.

This isn't just pure arginine, this is arginine nitrate. 

Pump uses the patented form of NO3-T which is arginine bonded with nitrates, the polyatomic ions sourced from vegetables like beets, kale and spinach. 

When nitrates are ingested, it can create more N.O. in the body. [5]

Nitrates are highly effective at increasing vasodilation to where the body needs it the most during training. 

More blood flow means more oxygen rich blood which will help keep your body and energy at it's most optimal state.

This also means the removal of metabolic waste products that occur from exercise like lactic acid. 

Aside from the pump, arginine nitrate can increase endurance as your body will need less oxygen to train. 

You'll also be less likely to develop nitrate tolerance as it's bonded with arginine. [6]

Transparent Labs has strategically paired nitrates with citrulline as it can lead to serious performance gains.

One study from 2019 had 24 adults consume 520mg of nitrates along with 6 grams of citrulline daily for a month and another group who had placebo.

They found the group that had the citrulline and nitrates had huge improvements in heart rate, blood pressure, oxygen consumption and maximal power output. [7]

Pump doesn't only have nitrates but it also has 8 grams of pure citrulline, making it a very synergic combination for pumps and performance.  

Betaine Anhydrous (as BetaPure™, 2.5g)

If you like creatine and you know its benefits, then you'll like betaine anhydrous. 

Like creatine, betaine can benefit size and strength gains. 

Doses in various studies vary from 500mg to 2.5g, while Pump has 2.5g, benefits can be seen with doses as little as 500mg!

Betaine works as a osmolyte, meaning it can drive water into cells to help protect against osmotic stress. 

Aside from it's health benefits like reducing homocysteine, it has performance enhancing effects. 

The first is it's ability to increase levels of serum nitric oxide concentrations. [8]

And studies have found with only 2 weeks of usage, betaine can increase strength.

One study found that participants improved squat volume with only two weeks of using betaine. [9]

And not only that but they also improved vertical jump power output, bench press throw power output, and force production in the isometric back squat and bench press. [10]

Betaine is an absolute must when it comes to improving gains in the gym, both strength and size and the dose Transparent Labs have used here is a full clinical dose of 2.5g. 

L-Tyrosine (500mg)

Tyrosine is one of our favorite ingredients for multiple reasons. 

One of them is that tyrosine is the fuel for feel good neurotransmitters in the mind. 

When you take stimulants, it can release those neurotransmitters, but when you take tyrosine, you ensure a steady flow of dopamine and norepinephrine. [11]

Tyrosine is a must for those experiencing high stress as it can improve mental function during those periods. 

Benefits from tyrosine can be seen with doses from 500mg to 2.5g, and here Pump has just enough at 500mg.  

L-Glutathione (as Setria®, 250mg)

Finalizing the combination of nitric oxide boosters is the addition of glutathione. 

This is one of the best antioxidants to use as it can combat oxidative stress, enhance nutrient metabolism and cellular functioning. [12]

The benefits it offers varies from reducing oxidative stress to increasing vasodilation. 

However, plain glutathione is known to have poor bioavailability. [13]

Transparent Labs Pump is using the patented form of Setria, a standardized form of glutathione from Kyowa Hakko which is suppose to be the solution to the poor bioavailability. 

Although this antioxidant hasn't been seen to improve performance, it's been noted to improve nitric oxide levels post exercise. [14]

Prolonging the pump post workout will help keep your physique looking fuller and more aesthetically pleasing to the eye. 

The combination of citrulline and glutathione may improve performance, but one thing is for sure is that it will help prolong the pumps. 

Astragin™ (50mg)

Rounding up the formula is the most important ingredient of all...

AstraGin is a combination of membranaceus and Panax notoginseng. 

This patented ingredient from NuLiv Science is made to maximize absorption of many ingredients that it's used with, including minerals and vitamins, amino acids, creatine and other nutrients. [15]

There's also astragalosides in membranaceus and Panax notoginseng which has been seen to improve ATP production in the mitochondria. [16]

Without AstraGin, you would simply not be making the most out of Transparent Labs Pump as it helps the digestive tract absorb much more of the ingredients. [17]


While it may not stand out in the formula, these ingredients actually make Pump that much more useful. 

The minerals in Pump include:

  • Sodium Citrate and Himalayan Rock Salt (350mg)
  • Vitamin C (250mg)
  • Potassium Citrate (100mg)
  • Folate (as BioFolate Calcium 5-Methyltetrahydrofolate) (400mcg)

Folic acid is an important essential nutrient which must be obtained from diet or supplements as our bodies cannot make them. [18 , 19]

It takes part in DNA synthesis and plays a crucial role in enzymatic reactions in the body. [19]

Potassium is another important nutrient that many struggle to get enough of in the Western diet although it's easy to get enough sodium. 

Potassium is not only important for hydration but it can also lead to more vasodilation as it can also lower blood pressure. 

Vitamin C is an antioxidant as we know it as it can reduce the tolerance build up of nitrates. [20]

Getting enough sodium is beneficial for hydration and will lead to better pumps

Athletes especially need to get enough sodium to help with performance. 

Pricing and Flavoring

So far there are two flavors:

  • Blue Raspberry
  • Strawberry Lemonade

Knowing Transparent Labs, they'll release more flavors in the near future as they have for most of their supplements. 

There's 30 servings in Pump, coming at a price tag of $50 but this can be reduced to $45 with discount code FITFREK

That comes to a price of $1.50 per serving, which is fair seeing how every scoop is packed to nearly 20 grams and it uses full clinical doses of every ingredient. 

PreSeries Pump by Transparent Labs

With 8g citrulline, 2.5g arginine nitrate, and much more, Transparent Labs Pump is one of our favorite pump formulas.

  • Big doses of nitric oxide boosters
  • Contains antioxidants
  • Long lasting vasodilation enhancements
Ingredients: 350mg Sodium citrate, 250mg Vitamin c, 100mg Potassium, 400mcg Folate (BioFolate), 8g Citrulline, 2.5g Arginine Nitrate, 2.5g BetaPure, 500mg Tyrosine, 250mg Setria, 50mg Astragin
Discount code: FITFREK
FitFrek earns a commission if you click this link and make a purchase, at no additional cost to you.

The Science Behind Transparent Labs Pump

The effectiveness of Transparent Labs Pump lies in its ability to boost nitric oxide levels in the body.

Nitric oxide is a molecule that helps widen blood vessels, allowing for better blood flow.

This is beneficial during workouts as it ensures that your muscles receive adequate oxygen and nutrients, enhancing performance and leading to better muscle pumps.

Benefits of Using Transparent Labs Pump

Transparent Labs Pump offers a range of benefits, from enhanced muscle pumps to improved workout performance.

It's also a great option for those wanting to take a break from stimulants. Plus, the fact that it's backed by science adds to its credibility.

Comparing Transparent Labs Pump with Other Pre-Workouts

When compared to other pre-workouts, Transparent Labs Pump holds its own.

While some pre-workouts may offer more servings or more ingredients per serving, Transparent Labs Pump offers a balanced formula that targets different aspects of workout performance.

Plus, its stimulant-free formula makes it a unique offering in the market.

Pros and Cons of Transparent Labs Pump

Like any product, Transparent Labs Pump has its pros and con

On the plus side, it offers a balanced, stimulant-free formula, is backed by science, and has received positive reviews.

On the downside, it's a premium-priced option and is only available on their website.

Transparent Labs Pump vs Stim-Free

Let's talk about another gem from the Transparent Labs family - the STIM-FREE Pre-Workout.

This pre-workout is packed with ingredients like citrulline malate, beta-alanine, betaine, and taurine, all at clinically effective dosages.

If you're someone who's not a fan of stimulants or you're planning to take a break from them, this one's for you.

Now, let's put Transparent Labs Pump and STIM-FREE Pre-Workout side by side and see how they stack up:

Transparent Labs Pump vs Transparent Labs STIM-FREE Pre-Workout

Both these products are champions in their own right, designed to take your workout performance to the next level, minus the stimulants.

But they're not identical twins. Here's how they differ:

  • Ingredients: Both the Pump and STIM-FREE Pre-Workout boast of citrulline and betaine, known for their performance-enhancing abilities. But STIM-FREE Pre-Workout takes it a notch higher with the addition of beta-alanine and taurine, absent in the Pump.
  • Formula: While both are stimulant-free, STIM-FREE Pre-Workout packs in more ingredients and offers a larger serving size (23 grams per scoop versus the Pump's serving size).
  • Purpose: Both are crafted to boost your workout performance, but STIM-FREE Pre-Workout is tailor-made for those who are sensitive to stimulants or are planning to "cycle off".
  • Price: Both come with a price tag of $49.99, placing them in the premium segment of the market.

To wrap it up, both Transparent Labs Pump and STIM-FREE Pre-Workout are excellent choices if you're looking to amp up your workout performance without stimulants.

Your pick between the two would depend on your unique needs and preferences. 


What flavors does Transparent Labs Pump come in?

Transparent Labs Pump is available in two flavors: Blue Raspberry and Strawberry Lemonade.

Can I use Transparent Labs Pump if I'm sensitive to caffeine?

Yes, Transparent Labs Pump is a stimulant-free pre-workout supplement, making it a great choice for those sensitive to caffeine or looking to avoid stimulants.

How should I use Transparent Labs Pump?

For best results, it's recommended to mix one scoop of Transparent Labs Pump with 10-12 ounces of water and consume 20-30 minutes before your workout.

Can I stack Transparent Labs Pump with other supplements?

Yes, Transparent Labs Pump can be stacked with other supplements. However, it's always a good idea to consult with a healthcare provider before starting any new supplement regimen.

What makes Transparent Labs Pump different from other pre-workouts?

Transparent Labs Pump stands out due to its stimulant-free formula. It's designed to enhance workout performance and muscle pumps without the use of caffeine or other stimulants. This makes it a great choice for those looking to avoid stimulants or take a break from them.

Is Transparent Labs Pump suitable for both men and women?

Absolutely. Transparent Labs Pump is suitable for both men and women who are looking to enhance their workout performance.

Can I use Transparent Labs Pump on non-training days?

While it's primarily designed to be used before workouts, some people choose to use Transparent Labs Pump on non-training days to maintain high nitric oxide levels. However, it's always best to follow the manufacturer's instructions or consult with a healthcare provider.

Does Transparent Labs Pump contain any allergens?

Transparent Labs Pump is gluten-free. However, it's manufactured in a facility that may also process ingredients containing milk, egg, wheat, soy, tree nuts, shellfish, fish, and peanuts. If you have any specific allergies, it's always a good idea to check the label carefully or consult with a healthcare provider.

How long does a tub of Transparent Labs Pump last?

A tub of Transparent Labs Pump contains 30 servings. If you're using it once a day for workouts, it should last approximately a month.

Prolong The Pump For Days

With nearly 20 grams of ingredients, Pump does one thing and one thing well...

And that's incredible pumps and performance. 

It uses a full 8 gram dose of pure citrulline, along with 2.5g arginine nitrate, 2.5g betaine and more. 

Adding in minerals that are much needed for the foundation of a great pump and endurance is a must, and Transparent Labs have done well here as well. 

Use discount code FITFREK.

by Nader Qudimat

Forged by iron and cold steel, I'm Nader, a mid-30s natural bodybuilder. Once a 100lb skinny guy, I've transformed into a 200lb muscular athlete with over 15 years of lifting experience. Today, I leverage my transformation and extensive experience to guide countless individuals on their fitness journeys.

Click here to check out my 12 year transformation: Natural 12 Year Transformation

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