Transparent Labs BULK Pre-Workout Review – Muscle Growth & Advanced Training

Transparent Labs BULK Pre-Workout

Everything you need to know about BULK’s pre-workout for advanced muscle growth and powered training.

Product Overview

We tested Transparent Labs, a Utah-based supplement company that features two pre-workouts, “LEAN” and “BULK.” BULK Pre-Workout focuses on advanced muscle growth. BULK is specifically formulated to help bodybuilders gain muscle mass using a patented blend of amino acids and testosterone support. We broke down the entire ingredient list below so that you can see what’s really going on with your pre-workout powder to help you with your training.

Transparent Labs stand firm on their commitment to full-label transparency. Every single ingredient in their supplements, even the flavoring and sweetener, is listed in exact doses so you know you’re getting precisely what’s on the label (and just as importantly, nothing that isn’t on the label). All Transparent Labs products are manufactured in a state-of-the-art facility that is certified current good manufacturing processes (CGMP) and registered with the Food and Drug Administration (FDA).

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Transparent Labs PreSeries BULK is backed by science with clinically effective dosages to increase muscle size and mass. This pre-workout is perfect for reducing fatigue, aiding in muscle growth, and boosting energy levels for better overall performance.

Transparent Labs is on a mission to help consumers make smarter choices about what they put in their bodies so they can reap the benefits of quality supplements that are backed by scientific research and clinical studies. Most importantly, they can be confident that each bottle of PreSeries BULK is free from impurities and tested before being put on the shelf.

Main Takeaways

  • Great for muscle growth and bulking for advanced and powered training.
  • 19 active ingredients that are clean and effective.
  • No artificial additives, coloring, or preservatives.

Transparent Labs BULK Pre-Workout

PreSeries BULK Highlights

PreSeries BULK features 20+ grams of 19 active ingredients per serving (30 servings per tub) and absolutely no artificial food coloring, no artificial sweeteners, no preservatives, no fillers, and no body-taxing chemicals that do nothing but detract from workout performance. Instead, PreSeries BULK is naturally flavored and sweetened with stevia, making it a sugar-free, vegan-friendly pre-workout formula that differs from other pre-workout supplements. This pre-workout is designed specifically for athletes, bodybuilders, and gym-goers who want to pack on lean muscle mass, maximize muscle cell volumization, enhance blood flow and muscle pumps, and increase strength.

WATCH: Check out our official GI review highlights of Transparent Labs BULK pre-workout above!


Citrulline Malate: Can improve strength, aerobic performance, and muscle endurance. May also raise nitric oxide levels in your blood (1).

Beta-Alanine: May improve exercise and aerobic performance and training volume while also increasing strength (2).

Branched Chain Amino Acids (BCAAs): Can increase muscle growth and muscle protein synthesis and decrease soreness while working for your benefit with less muscle breakdown and improved muscle endurance (3).

Betaine Anhydrous: Works to reduce fatigue and encourage muscle growth while aiding in intense workout for less next day muscle soreness from intense exercise (4).

L-Theanine: Can take away some side effects of caffeine and may reduce anxiety and stress (5).

Caffeine Anhydrous: Caffeine can increase energy and focus for better workouts while raising your level of alertness (6).

L-Norvaline: May work for increased cardiovascular support while promoting growth, muscle mass, and recovery.

Bioperine: Can increase absorption of these ingredients so they work more effectively for your gains.

Other Ingredients

Taurine, N-Acetyl L-Tyrosine, Choline Bitartrate, Mucuna Pruriens, Synephrine HCL, Hordenine, Natural Flavor, Stevia, Calcium Silicate, Silicon Dioxide

Transparent Labs BULK Pre-Workout Label

Stim Or No Stim Stim
Calories 0
Carbs 0g
Sugar 0g
Number Of Servings 30
Flavors Orange, Green Apple, Sour Grape, Blue Raspberry, Tropical Punch
Best Way To Take Mix 1 scoop with 16-24 fl. oz. of water 20-30 minutes before your workout.

Price, Flavors, and Effectiveness

When it comes to BULK Pre-Workout, this is a great pre-workout formula and supplement to increase lean mass, improve cognitive function, work for those muscle building goals, reduce muscle fatigue, and change body composition, all in efforts to improve overall exercise performance. With six delicious flavors to choose from, you won’t grow bored of the taste.

Flavors include: Lemon Lime, Watermelon, Sour Grape, Green Apple, Orange, Blue Raspberry, Strawberry Lemonade, Tropical Punch


  • Great benefits for increasing muscle growth and physical performance
  • Clean, honest, and transparent label and pre-workout formula
  • From a reputable company in Transparent Labs


  • Premium priced option
  • Only available directly from their website

Price: $49.99

Who Should Buy & Who Shouldn’t Buy

Who Should Buy: Those looking to bulk and see an increase in muscle mass. Also, those looking for a stim driven formula with plenty of great ingredients.

Who Shouldn’t Buy: Those who want to cut or slim down. Also, those sensitive to caffeine who may suffer unwanted side effects.

What To Consider Before Buying

Before buying your pre-workout, there are some important factors to consider.

  • Amount Of Stimulants

Pre-workouts tend to be driven by stimulants, like caffeine, which provide for great energy and focus. However, for some people, stimulants may not be exactly what you are looking for because you can suffer from those unwanted side effects.

  • Added Ingredients

Aside from stimulants, you want to look for those added ingredients that may help with caffeine jitters, enhance performance, reduce soreness, and a host of other benefits that can assist with your gains.

  • Flavors

Your pre-workout should taste good too and looking to great flavors can be a game changer for those goals. With great flavors, that are preferably from natural sources, you won’t grow bored with your product.

  • Price

Supplements can get expensive, but with the right product it is possible to get quality while it still being affordable. Be sure to look at price and price per serving to compare to get the best option.

Check out our list of the Best Pre-Workouts and see where Transparent Labs BULK landed!

Overall Value

Transparent Labs BULK is an excellent choice based off of the formula alone to improve strength and physical performance. The fact that it tastes good, is available in many flavors, and is not the most expensive formulation is just icing on the cake and this Bulk pre-workout review hopefully has changed your mind on this supplement. What you’re really getting is a high-quality and transparent pre-workout designed to improve strength, performance, and aid in your desired physique. Try Transparent Labs BULK today and see what this can do for all your gains.

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*Images courtesy of Transparent Labs and Envato


  1. Perez-Guisado, J.; et al. (2010). “Citrulline malate enhances athletic anaerobic performance and relives muscle soreness”. (source)
  2. Hobson, R.; et al. (2012). “Effects of B-alanine supplementation on exercise performance: a meta-analysis”. (source)
  3. Negro M.; et al. (2008). “Branched-chain amino acid supplementation does not enhance athletic performance but affects muscle recovery and the immune system”. (source)
  4. Hoffman, J.; et al. (2009). “Effect of betaine supplementation on power performance and fatigue”. (source)
  5. Owen, G.; et al. (2008). “The combined effects of L-theanine and caffeine on cognitive performance and mood”. (source)
  6. McLellan, T.; et al. (2016). “A review of caffeine’s effects on cognitive, physical and occupational performance”. (source)
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Austin Letorney is a writer, actor, and fitness enthusiast. As a former rower, he has shifted his focus to sharing his knowledge of the fitness world and strength sports with others.
Transparent Labs BULK is an excellent choice of pre-workout supplement based off of the formula alone to improve strength and physical performance. The fact that it tastes good, is available in many flavors, and is not the most expensive formulation is just icing on the cake and this Bulk pre-workout review hopefully has changed your mind on this great supplement. What you’re really getting is a high-quality and transparent pre-workout designed to improve strength, performance, and aid in your desired physique.transparent-labs-bulk-pre-workout-review