Transparent Labs Pre-series Bulk Review


Last modified: November 1, 2022

  • Value for money
  • Ingredients
  • Effectiveness
  • Testimonials

Transparent Labs Pre-series Bulk Overview


Transparent Labs Pre-series Bulk review


Transparent Labs Pre-series Bulk is the latest addition to the Transparent Lab family, the new pre workout has been flying off the shelves due to its incredible results, with 180 mg of caffeine and other complex ingredients it will put some hairs on your chest.

But do you want a more detailed scientific pre series bulk review? does it really lives up to the hype? Is it really worth the dollar? Look no further, we’ve detailed everything you need to know and more just bellow. 


What does Transparent Labs Pre-series Bulk do?

  • Sharpens the mind, increasing focus.
  • Increases blood flow.
  • Lose body fat.
  • Increase muscle mass.

Manufacturer Description

Transparent Labs Pre-series 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), Transparent Labs Pre-series Bulk is most effective for serious athletes and bodybuilders looking to gain size and increase muscle mass.

There’s a reason why Pre-Series BULK comes in jumbo-sized bags! 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.


  • 180mg of caffeine might be too low for some.

Consumer Testimonials

Have reviewed BULK before about four years ago, loved it then and still do, I’m from Australia so it costs a little more with our weak dollar, but it’s well worth it. You get what you pay for and BULK is worth every dollar.

I had been using another brand exclusively for about 4 years but was starting to notice it had little impact on my progress, and my motivation was tanking. I decided to give PreSeries a shot and in only a month have finally started to reach goals I’ve wanted for the past few years.

Nothing but good results from products that I have ordered. I mostly use the Bulk pre-work-out and it gives me the energy I need and the stamina for my 2-hour workouts.

People ask me in the gym what’s your secret? I tell them long hours, hard work and good quality products without all the inert materials in a lot of products on the market. That’s why I use Transparent Labs just like the name says with no hidden ingredients.

Video Testimonials


How should I take PreSeries BULK?

Obviously it should be taken before your workout so it can give you the energy you need in order to complete your workout. More specifically, it should be taken around 20 to 30 minutes before.

In relation to the mixture of the shake, you should mix 8-12 fluid ounces of water with half a scoop of PreSeries BULK. This is best suited to those who need to asses their tolerance.If you feel you may need a stronger portion, you can mix 16-24 fluid ounces with 1 complete scoop. Ultimately, you are best starting at half a scoop and then assessing the effects.

Why does PreSeries Bulk not contain creatine?

Since this supplement contains a large dose of caffeine, the ergogenic effects of creatine would be negated. Therefore there is no need for creatine to be added as you will not gain any of the benefits of creatine.

Will PreSeries Bulk make me fail a drugs test?

No. Most drug testing procedures will never fail someone for taking the ingredients in PreSeries BULK. However, in order to be completely sure, you should run it by the program coordinator as this my depend on the strictness of the testing procedure.

What's in Transparent Labs Pre-series Bulk

  • Vitamin D3.
  • Zinc – 30mg
  • Boron – 5mg.
  • Citrulline Malate 2:1 – 6000mg.
  • Beta Alanine – 4000mg.
  • BCAAs.
  • Betaine Anhydrous (BetaPure) – 2500mg.
  • Taurine – 1300mg.
  • N-Acetyl L-Tyrosine – 600mg.
  • Choline Bitartrate – 500mg.
  • L-Theanine – 360mg.
  • Caffeine Anhydrous – 180mg.
  • Mucuna Pruriens – 70mg.
  • L-Norvaline – 60mg.
  • Synephrine HCl – 50mg.
  • Hordenine – 25mg.
  • BioPerine – 5mg.

Ingredient Explanations

Vitamin D3, Zinc, Boron (“Testosterone Support” blend)

Vitamin D3 supports strong bone structure, a combat against fatigue, and supports testosterone levels.

Low zinc levels have been shown to be linked with depression in humans.

Boron is another valuable trace element important in the diet. In vitro, animal, and human experiments have shown that it beneficially affects bone growth and central nervous system function, as well as alleviating arthritic symptoms and facilitating hormone action. Thus, increasing boron intake by consuming a diet rich in fruits, vegetables, nuts and pulses should be recognized as a reasonable dietary recommendation to enhance health and well-being.

Citrulline Malate

A non-essential amino acid, citrulline malate has been shown to positively affect subjective feelings. The Journal of the International Society of Sports Nutrition concluded that “oral L-citrulline supplementation enhances cycling time trial performance.

Moreover, L-citrulline improves subjective feelings (e.g. of muscle soreness) after performance. This data, taken together, suggest that L-citrulline is a promising amino acid for enhancing sport performance.” Additionally (and only for the gents), citrulline improves erection hardness in men suffering from mild erectile dysfunction.

Beta Alanine

A form of the amino acid alanine, beta alanine improves muscular endurance. It has been reported many times that users can perform one or two additional repetitions in the gym when training in sets of 8–15 repetitions. Beta-alanine supplementation can also improve moderate- to high-intensity cardiovascular exercise performance, like shuttle runs, or rowing.


Branched chain amino acids (leucine, valine and isoleucine) are critical in pre-workout supplements. They have two main benefits: improving performance, and helping with recovery. Men’s Fitness published an article stating that in 1998 subjects took either BCAAs or a placebo before taking an endurance cycle ride in the heat. The BCAA group cycled 153.1 minutes on average, while the placebo group averaged only 137 minutes.

Another study, in Japan, looked at the effects of a BCAA-mixture on athletes during a one-month training stint and found that indices of blood oxygen-carrying capacity were increased.

The article went on to state that data shows BCAAs play an important part in decreasing muscle soreness. A Japanese study examined a group of men and women (some given BCAAs and others taking a placebo) as they did multiple testing days involving squats, which were used to promote delayed muscle soreness.

Both parties said they experienced less soreness when they were given BCAA supplementation. Studies like this and many others lead experts to believe it’s possible to consider BCAA as a useful supplement for muscle recovery.


A natural chemical, research has suggested that betaine might improve certain aspects of exercise performance, including body composition and strength, in experienced men who participate in strength training.


Taurine is an organic acid, in part made well-known for its use in energy drinks. It plays a part in lowering blood pressure and it can reduce stress by affecting the sympathetic nervous system. When consumed with caffeine and B vitamins, taurine can increase attention levels, so your pre-workout routine will be more effective when it comes to the all-important workout. [8].

N-Acetyl L-Tyrosine

A version of the amino acid tyrosine, this amino acid has been shown to prevent some of the cognitive decline in response to physical stressors. [9]. Tests have suggested tyrosine may prove useful in counteracting dwindling performance during episodes of sustained work coupled with sleep loss. [10].

Choline Bitartrate

Choline is a substance similar to B vitamins. It is used for its cognitive-boosting properties, which display more benefits in a pre-workout supplement than those to specific athletic performance. Therefore it seems to gear the brain and body to focus on the workout itself, rather than boost body performance during the actual workout. [11].


An important amino acid, L-Theanine regulates the neurotransmitter dopamine.  Data indicates that, at realistic dietary levels, L-theanine has a significant effect on the general state of mental alertness or arousal. [12].

Caffeine Anhydrous

The most commonly used stimulant, so much so that its absence in pre-workout supplements would be suspicious. Caffeine can improve exercise performance when it is ingested at moderate doses (3-6 mg/kg body mass). [13].

Caffeine also has an effect on the central nervous system (CNS), and it is now recognized that most of the performance-enhancing effect of caffeine is accomplished through the antagonism of the adenosine receptors, influencing the dopaminergic and other neurotransmitter systems. [13]. In short, caffeine is a “must” ingredient in pre-workout supplements.

Mucuna pruriens

This is a tropical bean also known as the Velvet Bean. It can help in the management of levels of stress [14], and influences healthy levels of testosterone in men [15].


Nitric oxide is a natural gas which facilitates the delivery of important nutrients around the body. L-Norvaline inhibits the enzyme arginase, which increase the rate of nitric oxide. In this way, L-Norvaline provides the muscles with oxygen and essential nutrients, thus maximising the efficiency of workouts.

In mouse macrophages, it was reported that, “L-Norvaline, which specifically inhibits arginase activity (i.e., reducing urea production by 50%), enhanced nitric oxide production (by 55%). [16].


An alkaloid stimulant found in bitter orange with similar qualities to ephedrine (though with less effect). The Federation of American Societies for Experimental Biology reported that synephrine, as a pre-workout supplement, “can improve cognitive function.” [17].


A chemical found naturally in several crops and fruits (particularly barley). On its own, the benefits of hordenine are still relatively inconclusive. However, when combined with caffeine and synephrine, there has been noted a “significant increase in energy expenditure in young, healthy individuals.” [18].


BioPerine® is a patented product. It is sourced from piperine – the active ingredient in black pepper. According to the manufacturers, BioPerine® is the only product sourced out of piperine to obtain a patented status for its ability to increase the bioavailability of nutritional compounds. [19].



































Our Verdict

A good valued product if bought in bulk, Transparent Labs’ Pre-Series Bulk is one of the best pre-workout supplements you can get your hands on. The ingredients listed work together as a powerful combination, and with some delicious flavors like strawberry lemonade and blue raspberry, a full scoop of this with a few oz of water and you’ll be pumping out those reps and stacking on the muscle in no time.

Previous Review Old School Labs Vintage Burn Review September 11, 2022 Next Review Proactol XS Review September 12, 2022