Pre JYM
JYM Supplement Science

Pre JYM

Impulso pré-treino extremo em pó!*
Fórmula completa avançada cientificamente para melhoria das sessões de treinamento*
9.0  out of 10  (3,844 Reviews)
2 Sizes
20 Servings
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8 Flavors
Black Cherry
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Price: $37.99  ($1.90 / Serving)
Flavor Rating: 6.6

Product Overview

JYM Pre Jym.

"Welcome to my latest creation, JYM Supplement Science. JYM combines real science with real ingredients to deliver unreal results. Pre JYM, my cutting-edge pre-workout product, has revolutionized the pre-workout category."

Supplement companies love to claim they've created a real “game-changer.” Pre JYM doesn't play that game. It doesn't need hype or flashy marketing. With 13 hand-picked ingredients included at full amounts, Pre JYM is in a league of its own.

Put simply, Pre JYM is the most effective pre-workout supplement I've ever developed. It's built on solid science and decades of professional experience. Nothing is hidden, and there is no filler. Pre JYM is research made real. It's pure pre-workout fuel."

Hit the JYM!

Jim Stoppani, PhD
Owner, JYM Supplement Science


The Power of Pre JYM
No Proprietary Blends

Look at the supplement facts panel on your favorite pre-workout product and you'll most likely see the term “proprietary blend.” Supplement companies want you to think this means they've created a special blend of ingredients that magically work together to deliver unique results. Because this blend is so amazing, they have to keep the amounts of each ingredient secret so no other company steals the formula.

The truth, however, is that propriety blends can serve a different purpose. They allow some supplement companies to hide how little of each ingredient they've actually put in a product. This can result in cheap, under-dosed, ineffective supplements.

Pre JYM doesn't use proprietary blends. Take a look at the supplement facts panel and you'll see the actual amounts of all 13 ingredients. I have nothing to hide. I'm proud of the amount of each and every ingredient I've included.

Proper Amounts

For the reasons detailed above, many supplement companies are moving toward transparency and axing proprietary blends. That's a good thing. However, some of these companies are still guilty of grossly under-dosing ingredients.

Take citrulline malate, for example. The research on this potent amino acid shows that you need 6 grams per serving. Most pre-workout products leave out citrulline entirely, and only a few of them provide anywhere close to 6 grams.

No "Abbreviated" Formulas

A handful of companies are as fed up as I am with proprietary blends and under-dosed formulas, but they fall short by using “abbreviated” formulas. An abbreviated formula is one that uses proper dosing of all ingredients, but only includes a few ingredients.

Take, for example, a pre-workout formula that includes beta-alanine, creatine, caffeine, and tyrosine. There's nothing wrong with it, but it could be made a lot more effective through the addition of ingredients like citrulline malate, betaine, and BCAAs, to name just a few. Why would companies not create the most robust formula possible? Because adding more ingredients costs too much money.

Pre JYM includes 13 ingredients that complement one another to prime the body for intense workouts, making it a complete pre-workout supplement. If you're looking for the most complete exercise supplement program available on the market today, take my Post JYM Active Matrix after your workout to get even greater amounts of potent ingredients like Creatine HCl, Betaine, and Beta-Alanine.

No Concentrates

Some companies also try to trick buyers by calling their pre-workout product “concentrated.” A serving of one of these “concentrated” products can contain as few as 3 to 6 grams of powder. What kind of magic did they use to cram enough creatine, beta-alanine, citrulline, arginine, caffeine, and other ingredients into that tiny serving? They didn't use any magic, which is why some of those “concentrated” formulas also include proprietary blends. That's also why the serving size of Pre JYM is more than 26 grams. It contains 13 ingredients at proper, powerful amounts.

JS, Not BS

I've been studying supplement science in the lab and gym for decades. I've been delivering supplement advice to millions of people in the pages of Muscle & Fitness, FLEX, and Muscle & Fitness Hers, as well as here on Bodybuilding.com and my own website, JimStoppani.com, for over a decade.

Most importantly, I've been training since I was 11 years old. Before each of my workouts, I would draw on all of my experience and all of my education to concoct my own pre-workout supplement, combining ingredients from 13 different bottles and tubs.

That's why I developed Pre JYM. I wanted to give my friends, colleagues, all of you, and myself the ability to access, in one bottle, the best ingredients in amounts suggested to help build lean muscle, torch body fat, improve strength, and boost speed.*


Pre JYM Active Ingredients Matrix Features
  • Full amounts of 13 science-backed ingredients.
  • 6 grams of citrulline malate to help promote better muscle endurance and bigger muscle pumps.*
  • 6 grams of BCAAs in the 2:1:1 ratio for blunting muscle fatigue, boosting muscle performance, and increasing muscle growth.*
  • 2 grams of creatine HCl for greater strength, endurance, and muscle growth.*
  • 2 grams of CarnoSyn® beta-alanine to boost muscle power, strength, endurance, and muscle growth.*
  • 1.5 grams of betaine for greater power and strength during workouts.*
  • 600 milligrams of N-acetyl L-cysteine to support your body's amino acid profile during exercise.*
  • 500 milligrams of Beet Root extract to enhance nitric oxide for bigger pumps and better energy.*
  • 300 milligrams of caffeine to help boost alertness and drive, increase muscle strength and endurance during workouts for greater training intensity.*
  • 150 milligrams of AlphaSize® alpha-GPC for better drive, focus, and strength in the gym.*
  • 50 micrograms of huperzine A to increase mental focus and establish a stronger mind-muscle connection.*
  • 5 milligrams of BioPerine® to enhance absorption of nutrients for even better results.*

Under the Microscope

Let's take a closer look some of the ingredients and amounts used to make Pre JYM such a pre-workout powerhouse.*

6 grams of Branched-Chain Amino Acids (BCAAs)
  • The BCAAs are three amino acids—leucine, isoleucine, and valine—that share a common structure.
  • Research suggests that leucine is the most critical because it stimulates muscle protein synthesis (i.e., muscle growth).*
  • Studies suggest the optimal ratio of leucine to isoleucine to valine in a pre-workout product is 2:1:1, exactly the ratio in Pre JYM.
6 grams of Citrulline Malate
  • In the body, citrulline is readily converted to arginine, and then to nitric oxide (NO). Research suggests that citrulline increases arginine and NO levels in the body better than arginine itself.* Arginine undergoes excessive breakdown by the intestines and liver. Studies have shown that citrulline does not, so whatever you consume is readily absorbed and put to use.*
  • Citrulline malate has also been shown to be an effective energy booster. One study reported that subjects consuming 6 grams of citrulline malate experienced an increase in ATP (energy) production during exercise and an increase in phosphocreatine recovery between bouts of exercise.*
  • Research also suggests that subjects supplementing with citrulline malate before a chest workout could complete more reps on most sets compared to subjects taking a placebo.
2 grams of Creatine HCl
  • There are many studies suggesting that creatine supplementation leads to significant gains in muscle strength and power, as well as muscle growth.*
  • Creatine HCl is made by attaching a hydrochloride (HCl) group to creatine.
  • Adding the hydrochloride group lowers the pH of creatine, making it more acidic. This drastically increases creatine's solubility in fluids, which may help increase its absorption and help to reduce stomach issues.*
2 grams of CarnoSyn® Beta-Alanine
  • Beta-alanine is an amino acid that gets taken up by muscle fibers and combines with the amino acid histidine to form carnosine.*
  • Research suggests that carnosine increases strength and power, improves endurance and recovery, and muscle growth.* This is increased further when taken together with creatine, as in Post JYM Active Ingredients Matrix™.
  • One study suggested that beta-alanine supplementation in boxers increased their average punching power in the last 10 seconds of a round more than those taking a placebo. Being able to maintain punching power late in the round is similar to maintaining more strength and power later in your workouts, meaning you can lift more weight for more reps.*
500 mg of Beta Vulgaris L. (Beet) Extract
  • Beet root extract is a rich source of nitrates. When you consume nitrates, they are broken down first to nitrites and then to nitric oxide (NO).
  • Beet root extract is a direct supplier of NO and uses a different pathway to produce NO than citrulline and arginine!*
  • Research suggests that nitrates can improve blood flow to working muscles and the brain.* The result is greater training intensity and endurance, and increased focus during workouts.*
  • Research has also found that nitrates can directly improve the muscle's ability to generate ATP (energy) to further improve endurance during intense exercise, such as lifting weights.*
1.5 grams of Betaine
  • Betaine, also known as trimethylglycine (TMG), is a modified version of the amino acid glycine.
  • Betaine supplementation has been suggested in studies to improve muscle strength and power production, increase the number of reps done with a given weight, and improve endurance.*
  • University of Connecticut researchers reported that supplementing with 1.25 grams of betaine twice per day for two weeks increased power and muscle force on the bench press.*
  • Betaine has also been shown to significantly increase protein synthesis following workouts as compared to a placebo. This can help lead to greater long term muscle growth.*
300mg of AlphaSize® Delivering 150mg of Alpha-Glyceryl phosphoryl choline (Alpha-GPC)
  • Alpha-glyceryl phosphoryl choline (alpha-GPC) is a naturally occurring phospholipid compound that plays a critical role in the way the brain, nervous system, and muscles function.
  • Alpha-GPC helps boost brain function and mood, improves reaction time, and helps increase focus and the mind-muscle connection during workouts.*
  • When combined with caffeine, L-tyrosine, and huperzine A (all found in Pre JYM), alpha-GPC delivers clean mental stimulation and focus that lasts throughout workouts.*
600mg of N-Acetyl L-Cysteine (NAC)
  • NAC is the amino acid cysteine with an acetyl group attached to it. Studies have suggested that the acetyl group makes it more stable and allows the body to absorb and use it better than plain cysteine.*
50mcg of Huperzine A
  • This extract from club moss is a potent brain booster that can promote better focus, enhanced memory, and elevated mood.*
  • Huperzine A helps maintain higher levels of acetylcholine, which is important for brain and muscle function.*
  • Combining it with alpha-GPC, which increases acetylcholine levels, has an additive effect, resulting in enhanced drive and focus in the gym, as well as increased muscle strength and endurance.*
300mg of Caffeine
  • Research shows that caffeine can increase muscle strength, improve muscle endurance, and decrease muscle fatigue during workouts, which allows you to take your training intensity to a higher level.*
  • Caffeine is also suggested to be a nitric oxide (NO) booster. One study in the American Journal of Cardiology reported that healthy young men taking 300 mg of caffeine experienced an increase in NO levels and an increase in blood flow to muscles.*
5 mg of BioPerine®
  • BioPerine® is a patented extract of the fruit of black pepper, or long pepper, that contains standardized amounts of the active ingredient piperine.
1.5g of Tyrosine
  • This amino acid promotes increased alertness, mental focus, mood, and energy during intense exercise, especially when combined with caffeine.*
1,000 mg of Taurine
  • Taurine is a specialized amino acid that is important for endurance and muscle strength.*
  • Exercise depletes taurine levels, thereby impairing strength and endurance, so it's critical to get a proper amount of taurine after every workout to replenish what was lost.*
JYM Supplement Science

Ratings & Reviews

Overall Rating
9.0
3,844 Ratings
Verified Buyer Rating
9.1
3,389 Ratings
Average Flavor Rating
9.0
8 Flavors
Top Rated Flavor
8.5
Raspberry Lemonade
By clicking the button above, you agree to entering the Bodybuilding.com Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
2
 
  • 5 Black Cherry

1. it's a big scoop and way too sweet 2.both my wife and I found it utterly useless. no energy, no pump, no drive, after hearing all the reviews I am totally disappointed even the latest version on NO xplode which I find week is far superior

10
Verified Buyer
  • 10 Orange Mango
10
Verified Buyer
  • 10 Orange Mango
  • 9 Cherry Limeade

Taste excellent! Provides a great pre workout energy boost that lasts for hours with no crash. I'm am thoroughly satisfied with the product

7
 
  • 7 Black Cherry

As an Exercise and Science major I'm a fan of JYM preworkout. I happy that they JYM uses hydrochloride creatine, rather than monohydrate. There is debate, whether there is a big enough difference between the two creatines, for the price, but I found that the hydrochoride doesn't get stored in the abdominal region as much. I found that creatine monohydrate tends to be stored more in by my visceral fat, which in my case, is primarily the stomach region. However, my one complaint is the caffeine. Jym's label states it contains 300mg of caffeine, but I didn't get the amount of energy 300mg of caffeine normally gives me (this is taking account for tolerance as well). I feel that JYM should increase the caffeine content by at least 50mg, especially considering other preworkouts (like Mr. Hyde) have as much caffeine as 420mg.

6
 
  • 5 Black Cherry
10
Verified Buyer

I was sceptical about the price. But, you get what you pay for. Everything you need in one scoop. This one does the job.

8
Verified Buyer
  • 2 Natural Island Punch
9
Verified Buyer
  • 9 Cherry Limeade

only downfall to this product is the caffeine content(and the price but you get what you pay for and it's worth it) knock it down to around 200 mg and it would be perfect. will continue to use though as it works very well.

10
Verified Buyer
  • 9 Raspberry Lemonade
10
Verified Buyer
  • 10 Raspberry Lemonade
  • 7 Strawberry Kiwi
4
Verified Buyer
  • 3 Orange Mango

I usually workout in the evening and after taking this product I am not able to sleep since it contains 300 mg of caffeine. I tried it with L-Theanine but that also didn’t help. Because of the high caffeine content, I have to discontinue using this product. Recently, I got to know about another product which has almost same composition with less caffeine, so I am going to try that now. Also, the price is too high for this product. I would also like to know why there is * mark at the end of almost each sentence. If the price can be reduced and if can come without stimulant than I can think about buying it in future.

9
Verified Buyer
  • 9 Rainbow Sherbet

Tastes like skittles with a hint of sour. Delicious. Awesome pump, unreal focus. The only downside is price. Is it worth $2.00 +/- per serving? Absolutely. Do I want to spend that much? No. I will buy this anytime it is on sale.

10
Verified Buyer
  • 10 Strawberry Kiwi

I been using this pre workout for 4 months now and I have tried several pre workout like 1MR, N.O. explode, c4 ripped and some other ones that obviously weren't good enough to mention but jym pre workout is hands down by far the best I have ever tried. I'm not guaranteeing it will work for because everyone's body reacts different to everything they take. But I think this is worth a shot. If you are thinking a about trying it see if you can snag 3 scoops from someone so you can try it a few times cuz I think just testing anything for one day doesn't do any product justice. The flavors are good but even if it tasted nasty I would still take it because it's all about results not taste just saying. I'm looking forward to trying the jym post workout.

10
Verified Buyer
  • 10 Orange Mango
10
Verified Buyer
  • 10 Cherry Limeade
  • 8 Orange Mango

What's in JYM Supplement Science Pre JYM

Serving Size: 1 Scoop (26g)
Servings Per Container: About 20
Amount Per Serving % Daily Value
Calories 80       
Total Carbohydrate 3 g 1%**
Sugars 2 g
Calcium 45 mg 5%
Sodium 10 mg 1%
Creatine Hydrochloride 2 g
Beta-Alanine (as CarnoSyn®) 2 g
Betaine (Trimethylglycine) 1.5 g
Taurine 1 g
N-Acetyl-L-Cysteine 600 mg
Alpha-Glyceryl Phosphoryl Choline (as AlphaSize®) 150 mg
Citrulline Malate 6 g
Beet (Beta vulgaris L.) Root Extract 500 mg
L-Leucine 3 g
L-Isoleucine 1.5 g
L-Valine 1.5 g
L-Tyrosine 1.5 g
Caffeine Anhydrous 300 mg
Huperzine A (Huperzia serrata) Extract 50 mcg
Black Pepper (Piper nigrum) Fruit Extract (as Bioperine®) 5 mg
** Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value not established
OTHER INGREDIENTS:
Dextrose, Natural and Artificial Flavors, Sucralose, Acesulfame Potassium, Caramel Color, FD&C Red #40, FD&C Blue #1, Calcium Silicate.
ALLERGEN WARNING: Produced on shared equipment that also produces products that may contain EGG, MILK, SOY, TREE NUTS, and WHEAT.

Instruções de Pre JYM: INSTRUÇÕES: misture 1 medida de Pre JYM em 420 ml de água 30-45 minutos antes do treino. ADVERTÊNCIA: consulte um profissional de saúde antes de usar esse produto. Não utilize este produto se você tiver sensibilidade à cafeína, se você estiver grávida, amamentando, tiver menos de 18 anos de idade ou se você tiver qualquer condição médica conhecida ou suspeita e/ou usar qualquer medicamento sujeito a receita médica ou de venda livre. Pre JYM é uma matriz de pré-treino incrivelmente forte que contém 300 mg de cafeína por porção, o equivalente a cerca de 3 xícaras de café. Evite usar com quaisquer outros produtos com cafeína. O excesso de cafeína pode causar nervosismo, irritabilidade, insônia e, ocasionalmente, batimento cardíaco acelerado. Sempre comece o uso com 1/2 medida ou menos e avalie a sua tolerância. Após determinar a tolerância, tome uma dose máxima de 1 medida. Para evitar a insônia, não use o produto no período de 6 horas antes de dormir. MANTENHA FORA DO ALCANCE DE CRIANÇAS.

Advertências: Check with a qualified healthcare professional before taking this product. Do not use if you are sensitive to caffeine, pregnant or nursing a baby, under 18 years of age, have any known or suspected medical conditions, and/or if you are taking any prescription or OTC medications. Pre JYM is an incredibly strong pre-workout matrix that contains 300mg caffeine per serving, the equivalent of approximately 3 cups of coffee. Avoid using with any other caffeinated products. Too much caffeine may cause nervousness, irritability, sleeplessness, and, occasionally, rapid heartbeat. Always begin use with 1/2 scoop or less and assess your tolerance. Once tolerance is assessed, take a maximum dose of 1 scoop. To avoid sleeplessness, do not consume within 6 hours of bedtime. Concerning California Residents: This product contains chemicals known to the State of California to cause cancer and birth defects or reproductive harm. KEEP OUT OF REACH OF CHILDREN.

* Essas afirmações não foram avaliadas pelo Food and Drug Administration. Este produto não é voltado ao diagnóstico, tratamento, cura ou prevenção de nenhuma doença.