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  (3,961 Reviews)
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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
3,961 Ratings
Verified Buyer Rating
9.1
3,482 Ratings
Average Flavor Rating
8.3
10 Flavors
Top Rated Flavor
8.5
Cherry Limeade
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.
May 20, 2019
10
Verified Buyer
  • 8 Tangerine

This flavor certainly taste like a tangerine. It is not as sweet as Orange Mango and not as tart or sour as Pink Lemonade. It has a refreshing taste to it and is well-suited for a morning workout pre-workout drink. No matter the flavor, this is still the best pre-workout I have used and I have not used any other pre-workout since Cherry Limeade was the first flavor released years ago.

May 20, 2019
10
Verified Buyer
  • 10 Orange Mango
  • 10 Pineapple Strawberry
  • 9 Rainbow Sherbet
  • 9 Refreshing Melon

The best pre workout on the market, with the perfect dosing of everything you need, when you pair it with the post workout. Orange Mango has to be the best flavor I have ever tried, and the wife and kids love it too!

May 18, 2019
10
Verified Buyer
  • 10 Orange Mango
  • 7 Cherry Limeade

Amazing pre-workout with the correct doses of critical ingredients needed to supplement your training. The Orange Mango flavor is by far one of the best supplement flavors I've ever had. The Cherry Limeade is also good, but the Orange Mango is certainly a cut above! I also use: PostJym, VitaJym, OmegaJym, ZMAJym, ShredJym, and ProJym.

May 17, 2019
10
Verified Buyer
  • 7 Tangerine

Tangerine is a pretty decent flavor. It tastes like a tangerine, it's tart, and not too sweet. Orange Mango is definitely better. Leaves a weird feeling in the back of my throat. As far as effectiveness, Pre Jym is solid.

May 16, 2019
10
Verified Buyer
  • 10 Orange Mango
  • 6 Tangerine
  • 10 Rainbow Sherbet
  • 9 Raspberry Lemonade

Best preworkout on the market. Never had a flavor I didn't like but my two favorites are Orange Mango and Rainbow Sherbet

May 10, 2019
10
Verified Buyer
  • 9 Raspberry Lemonade

Second best flavor....perfect for summer time

May 10, 2019
10
Verified Buyer
  • 6 Black Cherry
  • 9 Cherry Limeade
  • 9 Orange Mango
  • 8 Pineapple Strawberry
  • 7 Rainbow Sherbet
  • 9 Raspberry Lemonade
  • 5 Refreshing Melon
  • 5 Strawberry Kiwi
  • 9 Tangerine

Best pre work out on the market. Transparent label so you know exactly what you’re getting. Saves you money so you don’t have to purchase separate products such as creative and bcaas since they’re already in there. Can’t go wrong with any of the 3 legacy flavors (orange mango cherry limeade and raspberry lemonade). Just tried tangerine the other day and that flavor is super smooth and tastes great as well.

May 09, 2019
5
 
  • 1 Black Cherry

Although the preworkout does what it's supposed to, I didn't notice anything that stood out over most others. My two main gripes about this Pre is the scoop size and the taste. I usually take my pre as a shot with about 4-5 Oz of water because I hate the bloat feeling that comes with downing a full shaker before a workout and this scoop size is gigantic, the 4 Oz of water I normally use with this one single serving made it into a paste; adding the recommended water is just too much for me and it's my mistake for not reading the info beforehand. I also should've paid attention to the flavor ratings because this Black Cherry was quite possible the worst flavor I've ever tasted in a supplement. I know it sounds like an exaggeration but I just couldn't bear it, I had to brush my teeth after because of the lingering smell/after-taste and now I'm wondering what to do with this brand new tub of pre that I'll never use again

May 09, 2019
10
Verified Buyer
  • 9 Tangerine
  • 10 Orange Mango
  • 9 Cherry Limeade
  • 9 Raspberry Lemonade
  • 9 Pineapple Strawberry
  • 9 Rainbow Sherbet
  • 7 Black Cherry
  • 7 Refreshing Melon
  • 8 Strawberry Kiwi

I have been using all of the JYM products for at least 4 years. I absolutely love Pre JYM and the new Tangerine flavor is incredible, I put it up there with orange mango flavor. Even if they didn’t have amazing tasting pre workouts I would still take them. I know how I feel and perform when taking Pre JYM & JYM products. I get up very early for work and also use Pre JYM during the day as an energy drink.

May 06, 2019
6
Verified Buyer
  • 1 Pineapple Strawberry
  • 5 Rainbow Sherbet

Works great. Does give a tingle. Serving size is larger than most other PWO. Pineapple Strawberry was terrible, I couldn't get it down. Rainbow Sherbet is OK but probably wouldn't order that flavor again.

May 05, 2019
10
Verified Buyer
  • 10 Rainbow Sherbet

Best pre workout on the market! Incredible pump. Amazing taste. I found my product for years to come!

May 04, 2019
1
Verified Buyer
  • 1 Black Cherry

Firstly I will admit I was a long time user of Jack3d so I find it really hard to find a good pre workout. I was very hopeful about the Jym pre workout based on the reviews but was very disappointed. It had zero effect on my workout. No pump no increased energy etc. The scoop is huge and the amount of water recommended way to much to drink before a workout and the instructions of drinking it over 15mins and an hour before exercise!? Seriously! The Cherry flavor was sickly sweet and the product as a whole left me bloated and feeling sick. I would be burping it up throughout my workout making sit ups and cardio impossible. I gave it the benefit of the doubt and used it a few times to see if I got use to it but saw no improvement so I had to give up on it.

Apr 26, 2019
10
 
  • 10 Orange Mango
  • 9 Cherry Limeade
  • 10 Pineapple Strawberry

I’ve had 3 flavors so far all are amazing! I’d say the orange mango still holds the crown though. Love this product

Apr 25, 2019
10
Verified Buyer
  • 10 Orange Mango
Apr 23, 2019
8
 
  • 9 Orange Mango

I started taking pre jym for the first time about a month ago or so. And once I’m home my mouth always starts to salivate and I start feeling nauseous. Anyone else feel that way? I don’t that feel like that at the gym. It’s always once I’m done working out. Any feedback would be great, thanks!

2 Sizes
20 Servings
Choose a Size
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8 Flavors
Pineapple Strawberry
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Price: $37.99  ($1.90 / Serving)
Flavor Rating: 8.0

What's in JYM Supplement Science Pre JYM

20 Servings Pineapple Strawberry
Serving Size: 1 Scoop (26g)
Servings Per Container: About 20
Amount Per Serving % Daily Value
Calories 80       
Sodium 240 mg 10%
Total Carbohydrate 3 g 1%**
Total Sugars 2 g       
Includes 2g Added Sugars 4%
Creatine HCI (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) 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, Disodium Phosphate, Natural and Artificial Flavors, Sucralose, Acesulfame Potassium, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan).
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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