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PreSeries BULK Pre-Workout

PreSeries BULK Pre-Workout

$98.00 $49.00

Product Overview

PreSeries BULK was developed for a specific purpose - to be the most exceptional "bulking" pre-workout supplement available. The key ingredients, all backed by published scientific research, are included at clinically effective dosages and contain zero colored dyes, unnecessary fillers, or harmful additives.

With 100% formula transparency and a potent Testosterone Support complex (vitamin D3, boron, and zinc), PreSeries BULK is most effective for serious athletes and bodybuilders looking to gain size and increase muscle mass.

There's a reason why PreSeries BULK comes in jumbo-sized jugs! Each serving exceeds 21 grams and includes 19 active ingredients that are designed to increase nitric oxide ("pump") and focus while working out, reduce fatigue and muscle soreness, all while enhancing overall physical performance. 

Ingredient Profile

Serving Size: 1 Scoop (21.63g)
Servings Per Container:

Citrulline Malate 2:1 6,000 mg

From a performance standpoint, citrulline malate is the “star child” of pre-workout science.

We chose citrulline malate over L-arginine because it provides better absorption, higher plasma arginine levels, and has been found to:

  • Improve strength, aerobic performance, and muscle endurance [1,2]
  • Be at least twice as effective as L-arginine supplementation at raising nitric oxide [3]
  • Participate in the Krebs Cycle and enhance creatine re-activation between sets (malate in citrulline malate [4]
  • Enhance the use of branch chain amino acids like leucine during exercise [5]

PreSeries BULK contains 6,000 mg (6 grams) of citrulline malate per serving.

Beta-Alanine 4,000 mg

Supplementing with beta-alanine has been proven to increase cellular carnosine levels, which are quickly depleted during intense exercise [28, 29].

A majority of pre-workout supplements contain beta-alanine, but at significantly underdosed levels. Supplementing with proper dosing, as found in PreSeries BULK, is shown to:

  • Delay the onset of neuromuscular fatigue in men and women during intense exercise [30]
  • Provide a tingling sensation, which can be more aggressive (depending on tolerance), which is is normal and safe [33]
  • Reduce and combat the formation of altered proteins and promote the formation of healthy proteins [31]
  • Significantly increase lean mass and decrease fat in wrestlers [32]
PreSeries BULK contains 4,000 mg (4 grams) of beta-alanine per serving.
BCAA 2:1:1 (Instantized)(Fermented) 4,000 mg

The "2:1:1" refers to the ratio of leucine, isoleucine, and valine (in that order). So, for every 2,000 mg of leucine, there are 1,000 mg of isoleucine and valine. 


Leucine is the first branched-chain amino acid and is considered to be the most anabolic amino acid and is known for its strong activation of mTOR, the gene responsible for protein synthesis.

  • Leucine has been found to significantly increase strength during workouts [26].
  • Metabolites of leucine have been found to prevent muscle degradation and preserve lean mass [27].

PreSeries BULK contains 2,000 mg (2 grams) of leucine per serving.


Isoleucine is one of the three branched-chain amino acids, which aids metabolism during workout, promotes muscle growth, and executes anti-catabolism effects [48, 49, 50].

PreSeries BULK contains 1,000 mg (1 gram) of isoleucine per serving.


Valine, the third branched-chain amino acid, is essential in pre-workout supplementation due to its involvement in metabolism and muscle growth. It also helps to reduce tryptophan build up in the brain during workouts. This allows for greater energy and endurance while working out.

PreSeries BULK contains 1,000 mg (1 gram) of valine per serving.

BetaPure™ Betaine Anhydrous 2,500 mg

Recent clinical studies suggest that betaine supplementation triggers a significant muscle growth response. This response is independent of testosterone and is significantly advantageous alongside typical supplementation protocols.

Betaine supplementation has also been shown to:

  • Reduce fatigue when taken before and during weight training [34, 35].
  • Enhance phosphocreatine replenishment between sets when creatine is taken daily [36]*. 
  • Increases total repetitions and volume on the bench press exercise versus placebo [37].
  • In a recent study, betaine was found to significantly increase HGH and IGF-1, while decreasing cortisol in bodybuilding men [38].

PreSeries BULK contains 2,500 mg of betaine anhydrous per serving.

*(PreSeries BULK does not contain any form of creatine, as caffeine negates its absorption when taken in synchrony)

Taurine 1,300 mg

Taurine is an amino acid that is essential to pre-workout supplementation. Taurine competitively interacts with beta-alanine; thus, supplementation with beta-alanine and without taurine can lead to states of taurine deficiency [40].

Additionally, taurine used alongside BCAAs, has been found to reduce next-day muscle soreness more than either taken independently [39].

PreSeries BULK contains 1,300 mg (1.3 grams) of Taurine per serving.

N-Acetyl L-Tyrosine 600 mg

N-acetyl L-tyrosine is the acetylated version of the amino acid L-tyrosine. The acetylation improves the absorption and effective period of L-tyrosine, as well as optimizes the effectiveness of the energy and focus ingredients in PreSeries BULK.

  • L-tyrosine reduces the effects of stress and allows for greater mental focus and endurance [22].
  • L-tyrosine improves memory and performance in bodily stressing climates, such as the cold [23].
  • Believed to counteract the hypothyroid promoting conditions associated with extensive exercise.

PreSeries BULK contains 600 mg of N-acetyl L-tyrosine per serving.

Choline Bitartrate500 mg

Choline supplementation aids in regular intense training by maintaining acetylcholine levels for neural signaling, as well as participating in the BMHT pathway to covert homocysteine to methionine during prolonged sessions [41].

PreSeries BULK contains 500 mg of Choline Bitartrate per serving.

L-Theanine360 mg

L-theanine is an amino acid used by the body for the regulation of the neurotransmitter dopamine. When combined with caffeine, L-theanine demonstrates many benefits for athletes, like:

  • Increases reaction time, attention, and memory [14, 15, 16, 17]
  • Reduces jitters in caffeine sensitive individuals
  • Reduces stress and causes relaxation without affecting attention and energy [18].

PreSeries BULK contains 360 mg of L-Theanine per serving.

Caffeine Anhydrous180 mg

Caffeine, along with many of the complimenting stimulants and focus-enhancing ingredients in PreSeries BULK are clinically proven to reduce the sensation of effort. Approximately 180 mg of caffeine has been found and confirmed to significantly increase repetitions to failure and readiness to invest effort in athletes [7, 8].

Moderate doses of caffeine have also been found to not negatively interfere with natural thermoregulation like higher (300 mg+) caffeine-infused pre workouts do [9].

PreSeries BULK contains 180 mg of Caffeine Anhydrous per serving.

Mucuna Pruriens (98% L-Dopa)70 mg

Mucuna Pruriens has been found to bring both psychological and physical benefits to athletes. Psychologically, Mucuna Pruriens counteracts stress and provides a clean “peace-of-mind” feeling. Physically, Mucuna Pruriens decreases cortisol, promotes healthy testosterone levels in deficient men, and increase growth hormone levels [24, 25].

PreSeries BULK contains 70 mg of Mucuna Pruriens (98% L-Dopa) per serving.

L-Norvaline 60 mg

L-Norvaline directly reduces arginase activity in the body, which “up regulates” nitric oxide synthase’s (NOS) ability to produce Nitric Oxide from arginine [6].

Once in the body, citrulline malate is converted to arginine, which is then protected from in vivo arginase by L-norvaline, providing a stronger and longer NOS response.

PreSeries BULK contains 60 mg of L-norvaline per serving.

Synephrine50 mg

Supplementation with synephrine has been found to raise resting metabolic rate by 65 kcal [11]. This is the result of increased lipolysis (fat burning) and produces stimulatory effects that increase energy, athletic activity, motivation, and cognitive function [12] [13].

PreSeries BULK contains 50 mg of Synephrine HCl per serving.

Hordenine 25 mg

Hordenine is found naturally in select plants and fruits. Supplementing with hordenine, alongside synephrine, has been found to increase energy and metabolism.

Hordenine is similar in structure to ephedra, but unlike other adrenergic aminos, hordenine is metabolized primarily by monoamine oxidase B (MAOB, as opposed to MAOA); which avoids hypertensive events [10].

PreSeries BULK contains 25 mg of Hordenine per serving.

BioPerine 5 mg

Bioperine is an extract obtained from the black pepper fruit. In its patented form, BioPerine has been clinically tested (in the United States) to significantly enhance the bioavailability of various supplement nutrients through increased absorption. 

PreSeries BULK contains 5 mg of BioPerine per serving.

Testosterone Support 

PreSeries BULK, which is designed specifically for athletes and bodybuilders undergoing a "bulk phase" includes a unique Testosterone Support blend of Vitamin D3, Boron, and Zinc.

Vitamin D3 (as Cholecalciferol)

Adequate levels of vitamin D3 support cognition, mood, bone structure, and testosterone levels. Deficiencies in vitamin D3 are common, and result in lower testosterone levels.

PreSeries BULK contains 3,000 IU of Vitamin D3 (as Cholecalciferol) per serving.

Boron (as Boron Citrate)

Over time, Boron supplementation has been attributed to increased levels of free testosterone and a reduction in free testosterone binding globulin [42, 43].

PreSeries BULK contains 5 mg of Boron (as Boron Citrate) per serving.

Zinc (as Zinc AAC)

Zinc supplementation is essential to any aggressive athlete and contributes to a strong immune system, maximal testosterone production, and extensive enzymatic processes.

Sufficient zinc intake supports healthy food cravings, while zinc deficiencies have been associated with lack of hunger [44]. Overwhelming evidence has suggested a relationship between zinc supplementation and maximal testosterone levels in men [45, 46, 47].

PreSeries BULK contains 30 mg of Zinc (as Zinc AAC) per serving.

PreSeries BULK FAQ's

*Note: We cannot ship to Mexico or Norway

Q: When will my order be shipped out?

A: All orders ship out the following business day. 

Q: How should PreSeries BULK be taken to maximize its effectiveness?

A: In terms of timing, we recommend taking PreSeries BULK 20-30 minutes prior to your workout. In terms of how much water to drink with PreSeries BULK, we recommend mixing 8-12 fl. oz of water with 1/2 scoop (to assess tolerance) and mixing 16-24 fl. oz of water with 1 full scoop.

Q: I am subjected to drug testing for my sport, can I take PreSeries Pre-Workout?

A: Yes, absolutely. Transparent Labs contains zero illegal drugs of any kind. Depending on how rigorous your drug-testing procedures, we recommend showing your coach or administration our supplement facts panel.

Q: Why doesn't PreSeries BULK contain creatine?

A: Large doses of caffeine negates the ergogenic effects of creatine. PreSeries BULK contains 180 mg of caffeine anhydrous. If you're looking, specifically, for a pre-workout solution that includes creatine, we highly recommend taking a look at our PreSeries STIM-FREE.

Q: What is the difference between PreSeries BULK, PreSeries LEAN, and PreSeries STIM-FREE?

A: PreSeries BULK is designed to support lean muscle growth and includes a testosterone support complex, while PreSeries LEAN is designed to support fat loss and includes a thyroid support complex. PreSeries STIM-FREE, as the name suggests, contains zero stimulants and has added Creatine HCl.

Q: I don't live in the United States, can I still buy PreSeries BULK?

A: Yes - our fulfillment center allows us to ship worldwide. Standard shipping for international orders typically takes 10-14 business days to arrive. 

Q: Does Transparent Labs ship to my Country?

A: Transparent Labs ships Worldwide, except to the following countries, unfortunately, due to increasingly high fraudulent activity; Albania, Algeria, India, Lithuania, Macedonia, Romania, Russia, Tunisia, & Ukraine.