Pre Jym Pre Workout
JYM Supplement Science

Pre Jym Pre Workout

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  (4,054 Reviews)

Product Overview

True-Performance Pre-Workout

Strength* Energy* Endurance* Mind*

Pre JYM Containers

5 Must-Have Ingredients

6g BCAAs
6g Citrulline Malate
2g Creatine HCl
2g Carnosyn Beta-Alanine
1.5g Betaine
Jim Stoppani

Pre JYM™ Changed

The Supplement Industry

Upon introduction in 2013, Pre JYM ushered in an era of transparency and became known as the world’s first high-performance Pre-Workout supplement. Pre JYM was designed by renowned exercise and nutrition scientist Dr. Jim Stoppani to allow dedicated athletes to unlock the critical elements to fitness success: motivation, performance, transformation, and growth.*

13 Hand-Picked Ingredients

Pre JYM includes 13 ingredients that complement one another to prime the body for intense workouts, making it a complete pre-workout supplement. When it comes to supplement formulation, it is important to understand how synergies work. Certain ingredients work well when combined with other ingredients. This is where many supplement companies fall down. with PRE JYM, I personally selected these 13 quality ingredients that have fueled my workouts and those whom have applied my advice for years. As a scientist and bodybuilder, I understand how to combine both science and real use to attain real results.

No Proprietary Blends

Look at the Supplement Facts panel of your current pre-workout product and you'll likely see "proprietary blend," "pump matrix," "performance blend," or other catchy name in lieu of listing all ingredients and precise doses of each. Some supplement companies want you to think this means they've created a special concoction that magically delivers unique results. Because this blend is so amazing, they have to keep the amounts of each ingredient secret so that no other company steals the formula.

Truth is, proprietary blends typically serve a different purpose: They allow companies to hide how little of each ingredient they've actually put in the product. These ingredients are often cheap, ineffective, under-dosed, or all of the above. Pre JYM doesn't use proprietary blends – never has, never will. All 13 ingredients with exact doses that are clearly listed on the label. You deserve to know exactly what ingredients, and how much of each, are in the product you buy. Proprietary blends serve the purpose of hiding what’s in the product, plain and simple.

Bolt Icon Energy*
Focus Icon Focus*
Runner Icon Stamina*


Get stronger in the gym and train harder and longer. Pre JYM will help you do it with ingredients that promote energy, focus, and stamina. Set PR’s in all areas with Pre JYM as your high-performance training fuel.*


Gaining muscle helps support all goals – strength, physique, weight loss, and overall health and wellness. Pre JYM will spearhead your growth efforts with nutrients, not stimulants, that ignite protein synthesis to help you build more lean muscle.*

Nutrients vs. Stimulants

Your pre-workout should contain real nutrients that deliver real results, not various stimulants that do nothing more than get you temporarily "amped up." The Pre JYM formula is based on amino acids (the building blocks of protein) that fuel your muscles and provide "clean energy." The only stimulant in Pre JYM is caffeine, selected for its performance-enhancing benefits, not simply to give you a jolt. Pre JYM changed an entire sports nutrition category when it launched in 2013. Before then, pre-workouts were loaded with stimulants you couldn’t pronounce that gave you the jitters and little else. Stimulants provide a temporary boost. Nutrients, on the other hand, are the foundation for real gains in strength, muscle-building, endurance, and overall performance. Pre JYM was the first ever true performance pre-workout, and years after changing the industry, it’s still the product smart consumers choose to fuel their muscles, and their goals, with actual nutrients.*

No BS, Just Science

I've been studying nutrition and supplement science both in the lab and in the gym for decades. I’ve done the research, and I’ve converted it into real results for millions of real people just like yourself. I began educating hard-training men and women worldwide through the pages of Muscle & Fitness, FLEX, and Muscle & Fitness Hers magazines before finding a home for my programs, articles, and videos here on, as well as my own website I developed Pre JYM back in 2013 to take the results to the next level and provide myself and anyone else training hard in the gym the ability to access, in one bottle, the best supplement ingredients to help build lean muscle, torch body fat, improve strength, and boost performance.*

Ratings & Reviews

Pre Jym Pre Workout
Overall Rating
4,054 Ratings
Verified Buyer Rating
3,557 Ratings
Average Flavor Rating
10 Flavors
Top Rated Flavor
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Jan 14, 2020
Verified Buyer
  • 10 Cherry Limeade
  • 9 Tangerine
  • 8 Black Cherry

Finally an honest Pre-Workout! No BS ingredients to make me itch, to fool me into think it’s working, it just powers me through a focused session. All the ingredients are on the label, no “proprietary ingredients” or concentrated ingredients that are “equivalent to” bla bla bla like so many other brands. The JYM Supplement Science brand has a loyal customer following because it produces honest unreal results. If you are looking for a brand the works as hard as you do in the gym, the choose JYM.

Jan 08, 2020
Verified Buyer
  • 9 Cherry Limeade

Definitely the best pre-workout supplement I've ever had! I use it for the gym but also for pepping me up before a night shift etc as I honestly believes it seems to improve physical and cognitive performance - possibly via the caffeine but I used to use Fury Extreme which had even more caffeine though I didn't feel this good on that. The taste is very good too! Slight negative is I occasionally notice my lips + tongue going a bit red afterwards which can take a bit of explaining to colleagues etc. I'm a little unclear why it's this good but I'll certainly be a repeat customer!

Dec 31, 2019
Verified Buyer
  • 10 Raspberry Lemonade

This product helped me to gain muscle and boost my energy levels I would recommend to friends who is looking for a professional pre workout.

Dec 30, 2019
Verified Buyer
  • 10 Orange Mango
  • 10 Pineapple Strawberry
  • 10 Tangerine

Been using PreJym since the days of only having Cherry Limeade(which is also a very good flavor)! In all those years, I've never found anything that helps me get through my workouts as well. On top of that, all the products(which were created to compete with PreJym) that I have tried honestly make me feel sick...almost to the point of straight nausea.

Dec 21, 2019
Verified Buyer
  • 10 Raspberry Lemonade

This stuff works and I like the taste. I switched from Transparent Labs to JYM and won't be going back.

Dec 21, 2019
Verified Buyer
  • 10 Orange Mango

This is the best pre workout I’ve ever had, this stuff is so powerful and no crash at all, half of a scoop which is half serving gives me energy for about three hours of intense workout not kidding at all, I definitely recommended

Dec 18, 2019
Verified Buyer
  • 9 Raspberry Lemonade

I've been on pre jym for 2 weeks now and so far I like it. It has enough get up and go to it to keep you going through the workout but not enough to give you the jitters or shakes. Will be using again

Dec 17, 2019
Verified Buyer
  • 10 Strawberry Kiwi

Great pre work out , great flavours, no crash during the day , keeps me alert all day

Dec 15, 2019
Verified Buyer
  • 10 Cherry Limeade
  • 10 Raspberry Lemonade
Dec 04, 2019
Verified Buyer
  • 4 Tangerine
  • 10 Raspberry Lemonade

I don't like how much water you have to mix with it - even at 20oz the flavor is sooo sugary and strong. However, its a super clean preworkout that always feels great. tangerine flavor tasted like a rotten clementine honestly, but raz lemon was super.

Dec 03, 2019

Does what it says on the tin really, only once or twice did i end up staying awake till the early hours, very rarely got the B-A tingles etc, Seem to have put on 10lbs in weight and looks like its in the arms and chest area but not sure if thats just down to the Pre and more a combination of bulking and pre though its all gone up top and not stomach this time round lol Personally i prefer the Evlution Shred pre as seem to get a sweat on more with that which i didnt get with this. Will be interesting to see if i 'deflate' and if/how my strength suffers as a result of not taking anything

Nov 24, 2019
Verified Buyer
  • 10 Raspberry Lemonade

This is, BY FAR, the greatest pre-workout I've ever tried. I've tried a lot of different types and different brands. I've never felt so full of energy, so motivated, my muscles so pumped, with any other product.

Nov 23, 2019
  • 9 Cherry Limeade

I have tried a lot of pre-workout in my day and by far this is one of my favorites. The caffeine stimulant is not too strong and it is very smooth. The citruline in this makes the pump so much better. I highly recommend this product

Nov 23, 2019
Verified Buyer

Just switched back to Pre Gym from EVL, and I also take Pro Jym, and I have noticed a big difference in size and strength, Jim products are great, don't know why I didn't switch sooner😉

Nov 14, 2019
Verified Buyer

I’ve tried about 3-4 other popular pre-workouts and a few from my local gym. This is the ONLY preworkout that doesn’t give me jitters, red skin, or the *****. No side effects for me whatsoever and I feel great while I’m lifting. 100% the best I’ve tried.

2 Sizes
20 Servings
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7 Flavors
Cherry Limeade
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Price: $37.99  ($1.90 / Serving)
Flavor Rating: 8.5
A Cutting-Edge Pre-Workout Formula Built on Solid Science*

What's in JYM Supplement Science Pre Jym Pre Workout

20 Servings Cherry Limeade
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 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
Dextrose, Disodium Phosphate, Natural and Artificial Flavors, Sucralose, Acesulfame Potassium, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), FD&C Red #40.
ALLERGEN WARNING: Produced on shared equipment that also produces products that may contain EGG, MILK, SOY, TREE NUTS, and WHEAT.

Directions For Pre Jym Pre Workout: 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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