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  (4,063 Reviews)
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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
4,063 Ratings
Verified Buyer Rating
3,563 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.
Feb 25, 2020
  • 10 Rainbow Sherbet

This is by far my favorite flavor! Just the right amount of sweetness. Been using Jym products for a solid year and I’m very happy with the progress in the gym and on my physique.

Feb 21, 2020
Verified Buyer
  • 5 Pineapple Strawberry

It doesn't mix well and the flavor that I had tasted gross. It foams up a lot when shaking.

Feb 21, 2020
  • 7 Cherry Limeade
  • 7 Orange Mango

very good pump but test was not good

Feb 15, 2020
Verified Buyer
  • 10 Raspberry Lemonade

Dr Jim isn’t kidding when he says his pre-w/o has all you need for a stiff kick. You can tell from the portion size alone that it’s packed with all the goodies, with the biggest scoop I’ve seen and the most well rounded panel of ingredients. The flavor is equally strong but it’s pretty good, and mixes well in a 700 ml shaker if you want it during your workout.

Feb 09, 2020
Verified Buyer
  • 10 Cherry Limeade
  • 10 Raspberry Lemonade
  • 10 Black Cherry

Flavor is good, the best part is the level amounts of energy you get, I don’t spike then drop during the workout! I totally would recommend this pre workout!

Feb 04, 2020
  • 1 Rainbow Sherbet

Rainbow sh*t? The taste is HORRIBLE, and I’ve tried nasty supps before. Solid profile though. If you can bare the taste then go for it, but If I have to drink over 15oz of liquid with my pre workout, then I need to look forward to drinking it like Pre Kaged.

Feb 04, 2020
  • 9 Cherry Limeade

just a bit sweet but very hight quality ingredients doesn't harden up like some of the others pre workouts not mentioning any names C4 lol! Jym mixes pretty well gives you a great pump energy and focus.

Feb 01, 2020
Verified Buyer
  • 9 Cherry Limeade
  • 8 Orange Mango

This works great keeps you fuelled during a work out and gain those extra pumps.. first 30-40 minutes you can smash the workout after this it keeps you going for lighter work. Been taking for a while definitely prefer this to prekaged and optimum nutrition gold pre work out.. feels more of a premium product.. this pre work out will still keep you awake so avoid a few hours before bed! For UK deliveries BB need to stick with DPD and not use Hermes for delivery!

Jan 29, 2020
Verified Buyer
  • 10 Refreshing Melon

I've been using Jym products for over 3 years. Best brand out there. Real results. And hands down best flavors. I've tried other brands, nothing compared to the quality and taste of Jym Supplement science

Jan 29, 2020
Verified Buyer
  • 9 Raspberry Lemonade
  • 9 Orange Mango

Best preworkout I have had by far.

Jan 28, 2020
Verified Buyer
  • 9 Pineapple Strawberry
  • 10 Orange Mango
  • 8 Rainbow Sherbet
  • 8 Refreshing Melon
  • 10 Tangerine
  • 7 Black Cherry
  • 8 Raspberry Lemonade
  • 8 Cherry Limeade

Jym products are the real deal! Follow the directions for consumption and enjoy the energy and focus this pre workout brings! Best flavors on the market bar none!

Jan 26, 2020
Verified Buyer
  • 9 Tangerine
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.

2 Sizes
30 Servings
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Price: $39.19  ($1.31 / Serving)
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A Cutting-Edge Pre-Workout Formula Built on Solid Science*

What's in JYM Supplement Science Pre JYM Pre Workout

Serving Size: 1 Scoop (26g)
Servings Per Container: About 30
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%
Potassium 61 mg 1%
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 vulagris) 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).
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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