PreSeries LEAN was developed for a single purpose - to be the most exceptional "cutting" pre-workout supplement available for men and women alike. The key ingredients, citrulline malate, beta-alanine, betaine, hordenine, synephrine, and branched-chain amino acids (to name a few), are all included at clinically effective dosages and contain zero colored dyes, unnecessary fillers, or harmful additives.
With 100% formula transparency and a potent Fat Burning and Thyroid Support complex, which includes Chromium Picolinate, Zinc, and Guggulsterones, PreSeries LEAN is most effective for those looking to target stubborn fat, while simultaneously focusing on preventing lean muscle loss.
There's a reason PreSeries LEAN comes in jumbo-sized jugs! Each serving exceeds 15 grams and includes 21 active ingredients synergistically designed to provide a high-intensity pre-workout experience, while focusing systematically on fat loss and additional energy expenditure.
Serving Size: 1 Scoop (15.18g)
Servings Per Container: 30
From a performance standpoint, citrulline malate has long been a staple of pre-workout science and supplementation.
We chose citrulline malate over L-arginine due to its better absorption tendencies, higher plasma arginine levels, and because its 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 
- 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 LEAN contains 6,000 mg (6 grams) of citrulline malate per serving.BetaPure Betaine Anhydrous 2,500 mg
Recently, clinical studies have shown that supplementing with betaine can trigger 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 *.
- Increases total repetitions and volume on the bench press exercise versus placebo .
- In a recent study, betaine was found to significantly increase HGH and IGF-1, while decreasing cortisol in bodybuilding men .
PreSeries LEAN contains 2,500 mg of betaine anhydrous per serving.
*(PreSeries LEAN does not contain any form of creatine, as caffeine negates its absorption when taken in synchrony)BCAA 2:1:12,000 mg
The "2:1:1" refers to the ratio of leucine, isoleucine, and valine (in that order). So, for every 1,000 mg of leucine, there are 500 mg of isoleucine and 500 mg 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 .
- Metabolites of leucine have been found to prevent muscle degradation and preserve lean mass .
PreSeries BULK contains 1,000 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 500 mg (1/2 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 500 mg (1/2 gram) of valine per serving.Beta-Alanine1,500 mg
Supplementing with beta-alanine has been proven to increase cellular carnosine levels, which are quickly depleted during intense workouts and physical exertion. [28, 29]
A growing majority of pre-workout supplements contain beta-alanine, but at significantly underdosed levels.
Supplementing with proper dosing, as found in PreSeries LEAN, is shown to:
- Delay the onset of neuromuscular fatigue in men and women during intense exercise 
- 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 
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 LEAN.
- 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 LEAN contains 600 mg of N-acetyl L-tyrosine per serving.Choline Bitartrate 500 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 .
PreSeries BULK contains 500 mg of Choline Bitartrate per serving.L-Theanine 360 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 .
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 LEAN 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 .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 LEAN 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 .
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 LEAN contains 60 mg of L-norvaline per serving.Synephrine HCl 50 mg
Supplementation with synephrine has been found to raise resting metabolic rate by 65 kcal . This is the result of increased lipolysis (fat burning) and produces stimulatory effects that increase energy, athletic activity, motivation, and cognitive function  .
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 .
PreSeries LEAN 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 LEAN contains 5 mg of BioPerine per serving.Chromium (as Chromium Picolinate) 200 mcg
Chromium supplementation has been attributed to weight loss through blood sugar regulation and food craving suppression .
PreSeries LEAN contains 200 mcg of Chromium (as Chromium Picolinate) per serving.Thyroid Support 156.5 mg
Iodine (as Iodine Chelate)
Iodine is the primary mineral required in the thyroid's production of metabolism fueling thyroid hormones.
PreSeries LEAN contains 225 mcg of Iodine (as Iodine Chelate) 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 . Overwhelming evidence has suggested a relationship between zinc supplementation and maximal testosterone levels in men [45, 46, 47].
PreSeries LEAN contains 30 mg of Zinc (as Zinc AAC) per serving.
Selenium (as L-Selenomethionine)
Selenium supplementation aids metabolism by promoting muscular uptake of carbohydrates which aids individuals with underactive thyroid symptoms .
PreSeries LEAN contains 50 mcg of Selenium (as L-Selenomethionine) per serving.
Copper (as Copper AAC)
Copper supplementation is advantageous as a coenzyme for the conversion of iodine to biologically bound iodine.
PreSeries LEAN contains 1 mg of Copper (as Copper AAC)
Promotes the uptake of iodine by the thyroid .
PreSeries LEAN contains 75 mg of Guggulsterones per serving.
PreSeries LEAN FAQ's
Q: When will my order be shipped out?
A: All orders ship out the following business day.
Q: How should PreSeries LEAN be taken to maximize its effectiveness?
A: In terms of timing, we recommend taking PreSeries LEAN 20-30 minutes prior to your workout. In terms of how much water to drink with PreSeries LEAN, we recommend mixing 6-8 fl. oz of water with 1/2 scoop (to assess tolerance) and mixing 12-16 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 LEAN contain creatine?
A: Large doses of caffeine negate 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 LEAN, PreSeries BULK, and PreSeries STIM-FREE?
A: PreSeries LEAN is designed to support fat loss and includes a thyroid support complex, while PreSeries BULK is designed to support lean muscle growth and includes a testosterone 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 LEAN?
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.