PreSeries BULK was developed to be the best “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, zero artificial sweeteners or flavors, and zero 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.

 

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.

 

NOTE: PreSeries BULK contains fermented vegan BCAAs and is a vegan friendly product.

 

Of all the workout supplements you can buy, pre-workouts may have the widest variety of ingredients, dosages, and effects — which is why it’s hard to find the best pre-workout for your needs. Also, isn’t proper sleep, nutrition, and hydration all you need for an excellent workout?

 

It’s certainly true that these three lifestyle choices can radically improve your performance (as well as mood, muscle growth, and immunity). But for those who want a little something extra, the right pre-workout supplement can improve performance.

 

Choosing the right pre-workout, however, is challenging. Besides caffeine, there are scores of other ingredients that appear in these products — including amino acids, plant extracts, and other powders meant to improve endurance, power output, focus, fat loss, and blood flow.

 

That’s why we’ve tried dozens of pre-workouts, from the biggest brands to the newest up-and-comers, to find out the absolute best pre-workout supplements for any goal.

 

Transparent Labs Bulk might just be the best pre-workout supplement around. There aren’t any blends. It’s gluten-free and contains no artificial flavors, colors, or sweeteners.

 

And at 180 milligrams per scoop, BULK’s caffeine dosage is more manageable than some others on the market (which can get up to nearly 300mg per serving).

 

BULK also features big hits of Vitamin D and zinc. There’s also boron, which has some pretty positive links to testosterone production in the body.

 

Carbohydrates, caffeine, beetroot juice, and creatine monohydrate (a popular muscle-building supplement) are all common pre-workout supplement ingredients that have been shown to improve exercise performance.

 

The reason carbs help is pretty obvious—they’re your body’s go-to source of energy and what experts recommend eating before a workout to properly fuel.

 

“Evidence supports a range of carbohydrate uses for various athletic applications, from taking in 30 to 60 grams per hour during endurance events to simply rinsing the mouth with a carbohydrate solution before sprint events,” Georgie Fear, R.D., CSSD, a board-certified sports dietitian with One by One Nutrition, tells SELF.

 

After all, when exercising—especially at high intensities with boot camps, indoor cycling classes, and lifting sessions—your body uses blood glucose and glycogen (stored carbs) as its main energy source. So topping off your levels before you start your workout can help increase energy availability and performance, she says.

 

Meanwhile, caffeine obviously is a stimulant known for boosting energy and alertness, and research shows it can help improve sports performance too. Many of the studies have been done on small sample sizes, but there’s actually a lot of research backing caffeine’s ability to improve workout performance.

 

In fact, a 2020 review of 21 previously published meta-analyses on caffeine concluded that supplementation of it may enhance aerobic endurance, muscle strength, muscle endurance, jumping performance, and speed. Still, the authors caution that more research must be done on women and older individuals to make sure the results can be generalizable.

 

Beetroot juice is a little less researched, but a 2017 review on relevant studies found that it has consistently been shown to increase the body’s levels of nitric oxide—a natural vasodilator that expands blood vessels and increases blood flow—and improve cardiovascular performance.

 

Plus, a 2020 study published in the International Journal of Sports Physiology and Performance found that people who took a beetroot supplement before a 30-second, all-out cycling sprint test produced more power and felt lower rates of perceived exertion than those who didn’t take the supplement.

 

While it’s important to note that research on beets is still pretty young, and most studies are small, so far all of them show promising results

Lastly, creatine monohydrate is often included in pre-workout formulas. Creatine is a derivative of three amino acids that’s naturally produced in the body and stored in the muscles as a source of quick energy.

 

While studies show supplementing with high doses does help build muscle mass and increase strength over time, “you can take creatine monohydrate pre-workout, post-workout, or at 8:49 P.M.,” Fear says.

 

Some research even suggests that creatine monohydrate is actually more effective at boosting exercise performance if you take it after each workout as opposed to before—your body might be more apt to absorb and store it after workouts when your natural stores are at their lowest.

Even though you may have never heard of it, creatine is actually one of the most well-researched sports supplements over the past 20 years. These studies consistently show that in normal doses—three to five grams per day over the long term—it’s very safe for healthy adults.

 

(It has also been linked to improved cognition, a decreased risk of depression, and a lower risk of heart disease.) The most common side effect is weight gained from water retention; when your muscles store creatine, they also store water. This can make your muscles look slightly bigger and weigh a bit more.

INGREDIENT PROFILE
Serving Size: 1 Scoop (22.08g)
Servings Per Container: 30

Citrulline Malate           16,000 mg
Beta-Alanine                 4,000 mg
BCAA                            4,000 mg
BetaPure Betaine            2,500 mg
Taurine                          1,300 mg
L-Tyrosine                      1,000 mg
AlphaSize Alpha GPC          300 mg
L-Theanine                         360 mg
Caffeine Anhydrous            180 mg
Theobromine                           50 mg
Infinergy
Astragin                                 25 mg

 

Citrulline Malate             2:16,000 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
Be at least twice as effective as L-arginine supplementation at raising nitric oxide
Participate in the Krebs Cycle and enhance creatine re-activation between sets (malate in citrulline malate

Enhance the use of branch chain amino acids like leucine during exercise
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.

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
Increase overall muscle strength [ba1]
Improved muscle endurance and total work done [ba2]
Provide a tingling sensation, which can be more aggressive (depending on tolerance), which is is normal and safe

Reduce and combat the formation of altered proteins and promote the formation of healthy proteins
Significantly increase lean mass and decrease fat in wrestlers
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
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.
PreSeries BULK contains 2,000 mg (2 grams) of leucine per serving.

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

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

VALINE
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.
Enhance phosphocreatine replenishment between sets when creatine is taken daily *.
Increases total repetitions and volume on the bench press exercise versus placebo [37].
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.

 

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

 

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

 

L-Tyrosine               1000 mg
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.

 

L-tyrosine improves memory and performance in bodily stressing climates, such as the cold.

 

Believed to counteract the hypothyroid promoting conditions associated with extensive exercise.

 

PreSeries BULK contains 1000 mg of L-tyrosine per serving.

 

AlphaSize® Alpha-GPC            300 mg
AlphaSize® is a patented form of alpha-glycerylphosphorylcholine (GPC), a highly bioavailable source of choline. Choline is an essential B vitamin that the body uses to create acetylcholine and phosphatidylcholine, both of which play important roles in cognitive function and neurotransmission.

 

Several human studies show that alpha-GPC increases mental performance and physical performance, especially when taken in conjunction with caffeine. Hence, alpha-GPC has both nootropic and ergogenic properties, making it ideal as a pre-workout ingredient.

PreSeries BULK contains 500 mg of Choline Bitartrate per serving.

 

L-Theanine 360 mg
L-theanine is an amino acid used by the body. When combined with caffeine, L-theanine demonstrates many benefits for athletes, like:

Increases reaction time, attention, and memory
Reduces jitters in caffeine sensitive individuals
Reduces stress and causes relaxation without affecting attention and energy.
PreSeries BULK contains 360 mg of L-Theanine per serving.

 

Caffeine Anhydrous 180 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.

 

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

PreSeries BULK contains 180 mg of Caffeine Anhydrous per serving.

 

Theobromine 50 mg
Theobromine is the primary alkaloid found in cocoa beans, and is essentially the “little brother” of caffeine. Its functions in the body are suggested to be complementary to those of caffeine, acting as a phosphodiesterase inhibitor and central nervous system stimulant.

 

Research has also found that theobromine has differential contributions to mood and cognitive function when compared to caffeine, providing further insight into the distinct, yet synergistic nature of these naturally occurring stimulants.

 

PreSeries BULK contains 50 mg of Theobromine per serving.

 

Infinergy™ (Dicaffeine Malate) 30 mg
Infinergy™ is a trademarked caffeine salt of malic acid (dicaffeine malate) that was created to prolong the ergogenic effects of caffeine. Rather than the abbreviated “high” and subsequent crash people often experience after drinking a large cup of coffee, Infinergy™ provides a smoother and longer-lasting increase in mental performance and thermogenesis, all without the jitters and crashing from ordinary caffeine.

PreSeries BULK contains 25 mg of Infinergy™ (Dicaffeine Malate) per serving.

Astragin™ 25 mg
AstraGin™ is a novel extract of Astragalus membranaceus and Panax notoginseng — two adaptogenic herbs will longstanding history in traditional Chinese medicine . The constituents in these plants are suggested to selectively enhance the absorption of biomolecules by increasing intestinal permeability .