Pre JYM
JYM Supplement Science

Pre JYM

Pre-Workout Powder Powerhouse Packed with 13-Hand Picked Ingredients to Support Improved Workouts*
A Cutting-Edge Pre-Workout Formula Built on Solid Science*
9.1  out of 10  (3,855 Reviews)
2 Sizes
20 Servings
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9 Flavors
Black Cherry
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Price: $37.99  ($1.90 / Serving)
Flavor Rating: 6.2
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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 Con-Cret® Patented 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 Con-Cret® Patented 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
9.1
3,855 Ratings
Verified Buyer Rating
9.1
3,398 Ratings
Average Flavor Rating
7.4
9 Flavors
Top Rated Flavor
10
Pineapple Strawberry
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.
10
Verified Buyer
  • 9 Black Cherry
  • 10 Orange Mango
  • 10 Pineapple Strawberry
  • 10 Rainbow Sherbet

Love this pwo. The flavors are excellent and it makes me feel great in the gym. Never mind that small little scoop, I want it all. The flavors have all been delicious. The new pineapple strawberry is maybe the favorite. The caffeine doesn't bother me, it might others. I drink it over 30-45 minutes though.

10
 
  • 10 Rainbow Sherbet

I met Dr. Jim at the Arnold and he gave me about 5 samples of the Rainbow Sherbert flavor. I don't believe in taking a preworkout that doesn't taste amazing regarldess of the ingredients. They cost too much to not have the flavor knock your socks off. The Rainbow Sherbert is quite possibly the best preworkout flavor I've ever had. I also had great energy, focus, and pumps at the gym. The price is a little high, but I would definitely try this stuff out if I were you when it's on sale. Good stuff!

6
Verified Buyer
  • 6 Orange Mango
  • 7 Rainbow Sherbet

This pains me to write here publicly but i'm feel obliged. I've been using JYM since the early days. I'd stock up on Orange Mango in bulk and when it was out of stock i'd be bummed. The new 2.0 formulations just taste, and smell, plain awful...however I do still buy them loyally; while they suck compared to the legacy JYM they are still tolerable just nowhere near as good tasting...my hope is the feedback on this forum is leading to a revised formulation.

9
Verified Buyer
  • 9 Orange Mango

Great Product!! But for startes I would recommend taking maybe 3/4 or half a scoop so you dont get jittery. After taking it a few more times I can say it is amazing really like it and definitely getting another one!

1
Verified Buyer
  • 1 Cherry Limeade

As with most everyone else, I loved and trusted this product. However,,, with the 2.0 version I just can't buy it anymore. The taste is now horrid... I realize it shouldn't be about the taste but the original version was awesome and now it is disgusting to the point it is hard to choke it down. Can't fathom how Jim does not recognize this and fix it but I have moved on to pre-kaged instead. What a shame..

1
Verified Buyer
  • 1 Cherry Limeade

This really hurts a lot writing this review of this product but it has to be done and I hope that this can change in the future. When the old Pre Jym came out I loved the cherry limeade flavor so much that I bought this all the time. Now that time has passed and that this new Jym 2.0 came out I saw that cherry limeade was in its new container and I bought it. I was hoping for that same flavor from before. After tasting it I was disgusted with the change of the flavor. It hurts saying this but after trying this cherry limeade 2.0 I will no longer be using this supplement again until something gets changed with it. I don't know what the other original flavors taste like now but like this one, I have a strong feeling that they been messed with as well. I'm very sorry Dr. Jim but I can't keep using this supplement anymore.

1
 
  • 8 Black Cherry

Cramping/intestinal pain- I was very excited when the JYM line of products came out backed by Jim Stoppani. Once I started getting low on my previous pre/post I switched over but didn't start taking them until after a couple week break. It took some time to figure out after I started up again that the JYM pre workout mix was causing my some serious intestinal cramping. It's not something I've seen in reviews here for it so I thought I'd post in case there's more people out there. I had to stop taking it as it was just too much. I've used various pre-workout mixes and can't really seem to narrow down what the cause could be as I've had these ingredients in one form or another with my other supplements. Short: tastes great, backed by a well respected person in the exercise space, causes cramping and abdominal pain consistently with single scoop.

7
Verified Buyer
  • 7 Orange Mango

I used to use the original Pre Jym Orange & Mango so was annoyed when it vanished from the store. Recently purchased this new "2.0" version and was left a tad disappointed. The flavour is similar but it doesn't taste as fruity, almost watered down but at the same time the sweetness is through the roof. Doesn't feel like 300mg of caffeine either, I used to get quite a buzz from the original but this version feels more like a cup of regular coffee. I guess if you haven't tried the original or it was too strong for you then you may like this, but for me I'm left wishing they would revert to the original recipe. Perhaps it's a cost saving exercise as the ingredients look similar, but maybe lower quality?

9
Verified Buyer
  • 10 Orange Mango

Probably the best preworkout supplement I've had in a while. Definitely a comprehensive list of ingredients. Great, clean energy and focus. Solid pump. And the Orange Mango flavour is excellent.

6
Verified Buyer

I joined the JYM family through the PRO JYM. which I believe is by far the best protein the the market. So, I decided to move and try PRO/PRE JYM products. I am really confident that the ingredients are the best in both quality and dosis. My problem, is the flavor. It is just too sweet. And the flavor is too artificial. Leaves me with a bad taste. I really have a problem with that cause I am not enjoying the product.

10
Verified Buyer
  • 10 Natural Island Punch
  • 9 Orange Mango
  • 10 Cherry Limeade
  • 7 Rainbow Sherbet
  • 5 Strawberry Kiwi
10
Verified Buyer
  • 8 Refreshing Melon
  • 7 Black Cherry
  • 3 Natural Island Punch
  • 9 Orange Mango
  • 6 Raspberry Lemonade
  • 10 Rainbow Sherbet
  • 8 Cherry Limeade
  • 7 Strawberry Kiwi

Jym is the go to for my pre. He basically turned the supplement industry on its head for transparency a few years ago, and everything you need for a nice pump is in prejym. The rainbow sherbet is the best tasting pre on the market.

6
Verified Buyer
  • 7 Rainbow Sherbet

Sorry to say I’m on the fence with this product. The scooper like other have mentioned is huge. If you read my review of Pre-Kage I said the same thing. Pre Jym come with a lot of hype and a big price tag. I’m more than half way through my jar and if need be I will update this review but for right now I will not re buy this product because of cost, big scooper, and lack of effectiveness on me. Stay fit!

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

What's in JYM Supplement Science Pre JYM

20 Servings Black Cherry
Serving Size: 1 Scoop (26g)
Servings Per Container: About 20
Amount Per Serving % Daily Value
Calories 80       
Sodium 10 mg <1%
Total Carbohydrate 3 g 1%**
Total Sugars 2 g       
Includes 2g Added Sugars 4%
Creatine HCl (as CON-CRET®) 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 [from Toothed Clubmoss (Huperzia serrata) Aerial Parts Extract] 50 mcg
Black Pepper (Piper nigrum) Fruit Extract (as BioPerine®) 5 mg
** The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
† 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.

Directions For Pre JYM: Mix 1 scoop of Pre JYM in 14oz. of water and drink 30-45 minutes before workouts.

Warnings: 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.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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