research icon


Hours of Research

reviews icon


Reviews Examined

experts icon


Experts Interviewed

Transparent Labs is one of the most popular and well-known pre-workout supplement manufacturers in the United States.

The company has a wide variety of products, but their BULK pre-workout is among the most popular.

In this Transparent Labs Pre-Workout Review, we'll look at what makes BULK so effective and whether or not it's worth purchasing.

We'll also discuss some of the potential side effects associated with this supplement.

Transparent Labs BULK Pre-Workout is a powder pre-workout supplementation that can be added to water or your favorite beverage.

It is designed to help support muscle growth by building muscular endurance, increasing focus and energy, and reducing muscle soreness and fatigue.

The formula contains beta-alanine, caffeine, citrulline malate, and other ingredients that have been clinically shown to improve exercise performance and muscle growth.

In addition, it contains all-natural flavors with no artificial sweeteners, so you can be sure that you are getting a natural product. 

Transparent Labs BULK Pre-Workout

Transparent Labs BULK







Overall Rating


Transparent Labs BULK Pre-Workout – Why It Is Our Fav!

We all know how important it is to have a good pre-workout supplement. After all, it is the difference between a great workout and a lackluster one.

There are so many different pre-workouts on the market, however, that it can be hard to choose the right one.

Transparent Labs Bulk pre-workout is the only pre-workout I continually use. Their BULK pre-workout supplement is our favorite for a number of reasons.

Here are just a few reasons we love BULK Pre-Workout:

1. Flavor

BULK offers 7 different flavor varieties: watermelon, tropical punch, sour grape, green apple, blue raspberry, orange, and strawberry lemonade flavor.

I've tried a few different flavors of BULK pre-workout, and, in my opinion, they are all pretty good. I've had the strawberry lemonade, green apple, and blue raspberry, and they were all easy to mix and tasted great.

I think Transparent Labs' best flavor is the green apple, but the blue raspberry is a close second.

I usually mix my pre-workout with water, but you can also use milk or juice if you prefer; just keep in mind that it will modify the taste.

The important thing is that it is easy to mix and doesn't have any weird aftertaste. As for the best flavor, I think that's a matter of personal preference.

2. Performance Increase

I was skeptical at first, but I was hooked after my first workout. I felt like I had so much energy, and I was able to lift more weight and do more reps than usual.

I even worked out for an extra 30 minutes because I felt so good. Since using BULK Pre-Workout, my workouts have been much more productive, and I've seen a noticeable increase in my muscle building, strength, and endurance.

Mixing Transparent Labs BULK Pre-Workout

3. Focus

I have a hard time staying focused at the gym. I usually get distracted by my music or other people working out around me.

However, after taking this product, I found myself feeling more focused and able to stay on task.

The extra energy also helped me to push through my workout when I otherwise might have taken a break.

4. Energy

Within minutes of taking it, I could feel my heart rate increase, and I had a bit more energy than usual. I didn't really feel any more motivated, though.

The real test came when I hit the gym. I usually have a pretty tough time getting through my workout, but after using this pre-workout supplement, I felt like I could go forever.

My energy levels were through the roof! It definitely made me more awake and gave me the extra boost I needed to power through my workout.

5. Side Effects

I'm not generally a big fan of pre-workout supplements. I find that they often give me too much energy, make it hard to focus, and make me jittery.

However, BULK Pre-Workout made me pleasantly surprised.

I felt more awake and alert without being jittery, and I had a lot of energy throughout my workout. I even felt motivated to push myself harder than usual.

However, it's important to keep in mind that this pre-workout can cause an upset stomach, beta-alanine itch, and caffeine jitters. So, it may not be best for everyone.

6. Post-Workout

I had a really great experience with these dietary supplements. I didn't have any crash after taking it, and I felt really energized during my workout.

7. Cost & Availability

This pre-workout formula is widely available and easy to find. I've seen it in stores like GNC, Vitamin Shoppe, Amazon, and even Walmart.

The best option for buying BULK Pre-Workout is probably Amazon or the Transparent Labs Website. They have a wide selection of products and usually have the best prices.

You can also find good deals on BULK Pre-Workout at GNC and Vitamin Shoppe, but Amazon is usually the cheapest place to buy it.

Overall, BULK Pre-Workout is a great product that is easy to find and reasonably priced.

Transparent Labs BULK Pre-Workout

Transparent Labs BULK







Overall Rating



  • You will have more energy
  • Pre-workout offers more focus
  • Performance increase
  • There's no crash after this pre-workout
  • It’s effective and affordable


  • Some people experience side effects like jitters or headaches
  • Slightly more expensive than other brands
  • Powder doesn't dissolve well in super cold water

Transparent Labs BULK Ingredients (Nutrition Per Serving)

Transparent Labs BULK Supplement Facts

One thing I really appreciate about these Pre-Workouts is their transparent product label and supplement facts panel.

Although their name is a given (Transparent Labs), every ingredient is listed with its exact dosage.

Here's the full breakdown of Bulk pre-workout ingredients and dosages:

Vitamin D3 (75 Mcg)

Vitamin D3 is a nutrient that helps the body absorb calcium and phosphorus. It also helps to regulate the immune system and keep bones healthy.

However, many people don't get enough sun exposure, especially during the winter months. This can lead to a vitamin D3 deficiency, which is why vitamin d supplementation is important. 

Vitamin B6 (5 Mg)

Vitamin B6 is a water-soluble vitamin that plays an important role in metabolism and energy production.

It is also involved in the muscle protein synthesis of amino acids, which are the building blocks of protein.

Vitamin B6 has been shown to boost exercise performances, stimulate muscle growth, and increase muscle mass when taken in combination with other vitamins and minerals.

Vitamin B12 (100 Mcg)

Vitamin B12 is an essential nutrient that plays a role in several key functions in the body.

It helps to convert food into energy and promotes the formation of new blood cells. It's also necessary for proper nerve function.

This formula includes 100 mcg of vitamin B12 to help support energy production, red blood cell formation, and nervous system function.

Zinc (30 Mg)

Zinc is an essential mineral that is necessary for the proper function of both the immune and reproductive systems.

Zinc is especially important for maintaining peak testosterone production levels and maximizing muscle growth.

Pre-workout formulas like BULK Pre-Workout contain 30 mg of zinc, making them an ideal way to ensure that you're getting enough of this essential nutrient.

Sodium (150 Mg)

Sodium is an electrolyte that is essential for proper muscle function. When you exercise, your muscles need more sodium to help regulate fluid levels and prevent cramping.

These Pre-Workout supplements include 150 mg of sodium - just enough to replenish your electrolytes without overloading you with salt.

In addition to preventing cramping, sodium also helps to improve hydration and increase blood flow. As a result, it's an important ingredient in any pre-workout supplement.

Potassium (100 Mg)

Potassium is an essential mineral that plays a vital role in many of the body's functions. It helps to maintain fluid levels, regulate blood pressure, and support nerve and muscle function.

Potassium is also involved in energy production and helps to protect against heart disease and stroke.

Studies have shown that potassium can help improve performance and reduce neuromuscular fatigue.[1]

Potassium is also involved in electrolyte balance, which is important for maintaining hydration during exercise.

Boron (3 Mg)

Boron is sometimes promoted as a "natural" way to enhance athletic performance, muscle building, and increase strength. However, there's no scientific evidence to support these claims.

In fact, the only known benefit of boron supplementation is its ability to improve calcium absorption.

This might make it useful for preventing or treating osteoporosis in postmenopausal women.

Citrulline Malate 2:1 (6,000 Mg)

Citrulline malate is a compound that is made up of the amino acid L-citrulline and malic acid.

It is thought to be beneficial for exercise performance since it can help increase blood flow and reduce fatigue giving you optimal aerobic performance.

Additionally, citrulline malate has been shown to improve muscle recovery after exercise. For these reasons, citrulline malate is a popular choice for many athletes and bodybuilders.

Beta-Alanine (4,000 Mg)

Beta-alanine can help to delay the onset of fatigue, allowing you to work out for longer. It does this by increasing levels of carnosine in the muscles, which acts as a buffer against lactic acid build-up.

In addition, beta-alanine has also been shown to improve power output and reduce recovery time following exercise. Just beware of that infamous tingle it can cause.

BCAA 2:1:1 (4,000 Mg)

BCAA 2:1:1 (4,000 mg) are essential amino acids.  BCAA stands for Branched Chain Amino Acids, and these particular acids - leucine, isoleucine, and valine - are essential for muscle gain, growth, and repair.

When taken before a workout, BCAA supplements help to increase energy levels and reduce fatigue. They can also help to minimize muscle soreness after exercise.

In addition, BCAA supplements can improve the body's ability to burn fat for fuel.

Betaine Anhydrous (2,500 Mg)

Betaine Anhydrous is a compound that is derived from the amino acid glycine.

Betaine anhydrous has been shown to increase levels of creatine in the body, which can lead to improved muscle strength and power output.

Additionally, betaine anhydrous has been shown to improve blood flow and increase nitric oxide production, both of which can enhance exercise performance and muscle endurance.

Taurine (1,300 Mg)

Taurine is a non-essential amino acid. However, it is found in high concentrations in the brain and muscles.

It is a powerful antioxidant that helps protect cells from damage and has been shown to enhance physical performance.

Taurine has also been shown to improve mental focus and reduce anxiety. In addition, taurine helps to regulate blood sugar levels and has anti-inflammatory properties.

L-Tyrosine (1,000 Mg)

L-Tyrosine is a non-essential amino acid that plays an important role in the production of protein, neurotransmitters, and plasma steroid hormones.

Proponents claim that L-Tyrosine supplements can improve mood, cognitive function, and physical performance.

L-Theanine (360 Mg)

L-Theanine is an amino acid that has been shown to promote relaxation without causing drowsiness. It does this by increasing levels of GABA, serotonin, and dopamine in the brain.

L-Theanine also reduces the release of Cortisol, the stress hormone. This helps to ensure that users feel calm and focused during their workout while also reducing the risk of Cortisol overload.

Alpha GPC (300 Mg)

Alpha GPC (300 mg) is a nootropic supplement that has been shown to improve memory and mental performance. It is an effective energy booster, helping you to stay alert and focused during your workout.

Alpha GPC has also been shown to increase growth hormone levels, which can help to build muscle mass. In addition, it can also help to reduce fatigue and improve recovery time after exercise.

Caffeine Anhydrous (180 Mg)

Caffeine anhydrous is a dehydrated form of caffeine absorbed more quickly by the body. Caffeine is a central nervous system stimulant.

Moderate doses of caffeine anhydrous ensure that users will experience increased alertness, improved exercise performance, reduced muscle fatigue, and increased stamina.

Theobromine (50 Mg)

Theobromine is a plant-derived alkaloid that naturally occurs in cocoa beans. It's related to caffeine intake but has a milder effect on the central nervous system.

Dicaffeine Malate (30 Mg)

The malate form of caffeine is easier on the stomach than other forms, making it ideal for those who are sensitive to stomach discomfort.

AstraGin (25 Mg)

AstraGin is a natural extract that has been shown to increase the absorption of amino acids and minerals.

In addition to its superior absorption properties, AstraGin has also been shown to promote healthy immune function and reduce inflammation.

The combination of caffeine, creatine, beta-alanine, and BCAAs in pre-workouts help to increase testosterone production and provide muscle gain.[2]

Who Should Take Transparent Labs BULK Pre-Workout?

Transparent Labs BULK Pre-Workout is a great choice for those who are looking to increase their strength and size. The formula is designed to support increased energy levels, focus, and endurance.

It also contains ingredients that help to reduce fatigue and promote recovery.

As a result, Transparent Labs BULK Pre-Workout is an excellent choice for athletes or gym goers who are looking to improve their performance.

Additionally, the formula is vegan and gluten-free, making it a great choice for athletes with dietary restrictions.

Who Should Avoid Transparent Labs BULK Pre-Workout?

There are a few different groups of people who should avoid taking Transparent Labs BULK Pre-Workout.

First, those with high blood pressure or heart conditions should not take this supplement, as it can increase blood pressure and heart rate.

Second, pregnant or nursing women should not take this supplement, as it is not known if the ingredients are safe for them.

Finally, children under the age of 18 should also avoid taking this supplement, as they may be more sensitive to the ingredients.

If you are unsure whether you fall into one of these categories, it is best to speak with a doctor before taking Transparent Labs BULK Pre-Workout.

Taking this supplement when you shouldn't can lead to serious health problems.

How Does Transparent Labs BULK Stack Up Against Competitors?

Transparent Labs BULK is a very popular supplement, and for good reason.

It contains a high-quality blend of ingredients that have been proven to be effective in boosting muscle growth and physical performance when compared to other pre-workout supplements. 

Additionally, the price is very reasonable, especially when compared to other similar supplements.

Transparent Labs BULK Vs Pre-Kaged

Both products are designed to help you maximize your workout performance, but there are some key differences to keep in mind.

Transparent Labs BULK is a pre-workout powder that contains 22 grams of active ingredients, including Creatine Monohydrate and Beta-Alanine.

In contrast, Pre-Kaged is a pre-workout drink mix that contains 25 grams of active ingredients, including L-Citrulline and Beet Extract.

Both pre-workouts offer nearly identical price points per serving, but if you're looking for more caffeine, then Pre-Kaged will be your choice, as it offers 100mg more caffeine per serving than Transparent Labs. Personally, I'll stick with Transparent Labs and avoid the jitters.

Transparent Labs BULK Vs Alani Nu

Both Transparent Labs BULK and Alani Nu offer a variety of benefits that can help you take your workout to the next level.

Transparent Labs BULK is a great choice for gym goers looking for a boost in energy and endurance.

The formula contains caffeine and other ingredients that help to increase alertness and focus during intense exercise.

Additionally, Transparent Labs BULK is free of artificial sweeteners and colors, making it an excellent option for those looking for a natural pre-workout supplement.

Alani Nu, on the other hand, is a great choice for those who are looking for a pre-workout that is high in protein.

The formula contains Whey Protein Isolate and Pea Protein, providing 25 grams of protein per serving.

Additionally, Alani Nu is low in calories and fat, making it a great choice for those trying to work on weight loss. Although marketed for women, all healthy adults can take Alani Nu.

Common Transparent Labs BULK Questions

Where are Transparent Labs manufactured?

All of Transparent Labs' supplements are manufactured in the United States in a cGMP (current Good Manufacturing Practices) facility.

How does their Bulk pre-workout compare to their lean option?

Transparent Labs' PreSeries BULK Pre-Workout and their lean option serve two different purposes.

The BULK Pre-Workout is designed for people who want to build muscle mass, while the lean option is designed for people who want to focus on fat loss.

How do you take Transparent Labs Preseries BULK?

To use Transparent Labs BULK, simply add one scoop of powder to a glass of water or milk and mix well. You could also use half a scoop if you prefer.

Can women take Transparent Labs BULK?

While the product is primarily marketed to men, there is no reason why women cannot take Transparent Labs BULK.

In fact, many of the ingredients in the supplement can be beneficial for both men and women.

Is there a Transparent Labs stim-free pre-workout?

If you're looking for a pre-workout that doesn't contain any stimulants, their PreSeries Stim-Free contains a blend of ingredients like Beta-Alanine, L-Citrulline, and Nitrosigine that can help to improve your strength, endurance, and pump without the use of any stimulants.

This is available in familiar flavors like tropical punch and sour grape.

Is Transparent Labs third party tested?

Yes, Transparent Labs PreSeries Bulk is third party tested. They use an independent, ISO-accredited laboratory to test their sports nutrition products and pre-workouts for potency and contamination.

Final Verdict - Our Top Pick!

Overall, Bulk Pre-workout is an effective supplement for those looking to improve their workout performance. I rate it number one when compared to other pre-workouts.

It contains a good blend of ingredients that have been shown to be effective in clinical studies. BULK pre-workout ingredients are clearly listed on the label, so you know exactly what you're getting.

Bulk Pre-workout cost is also fairly reasonable,  and it comes with a money-back guarantee.

If you're looking for a pre-workout supplement that can help you take your workouts to the next level, Bulk Pre-workout is definitely worth considering.

We hope you enjoyed our Transparent Labs Bulk review and you’re ready to give this brand a try.



Last Updated on January 5, 2024

Photo of author

Andrew White

Andrew White is the co-founder of Garage Gym Pro. As an expert fitness professional (gym building nerd) with over 10 years of industry experience, he enjoys writing about everything there is to do with modern fitness & the newest market innovations for garage gyms. When he isn’t testing out products for his readers, he’s usually out surfing or playing basketball.