Pre Jym Pre Workout
JYM Supplement Science

Pre Jym Pre Workout

Food Supplement
Pre Workout with High Quality Ingredients
9.1  out of 10  (4,054 Reviews)
Limited Time Offer

Save 25% off your order *Exclusions Apply

Product Overview

"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 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 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 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 support your fitness goals.


Pre JYM Active Ingredients Matrix Features
  • Full amounts of 13 science-backed ingredients.
  • 6 grams of citrulline malate
  • 6 grams of BCAAs in the 2:1:1 ratio
  • 2 grams of creatine HCl
  • 2 grams of CarnoSyn® beta-alanine
  • 1.5 grams of betaine
  • 600 milligrams of N-acetyl L-cysteine
  • 500 milligrams of Beet Root extract
  • 300 milligrams of caffeine
  • 150 milligrams of AlphaSize® alpha-GPC
  • 5 milligrams of BioPerine®

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.
  • 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.
2 grams of Creatine HCl
  • Creatine increases physical performance in successive bursts of short-term, high intensity exercise. The beneficial effect is obtained with a daily intake of 3g of creatine.
  • Creatine HCl is made by attaching a hydrochloride (HCl) group to creatine.
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.
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.*
1.5 grams of Betaine
  • Betaine, also known as trimethylglycine (TMG), is a modified version of the amino acid glycine.
300mg of AlphaSize® Delivering 150mg of Alpha-Glyceryl phosphoryl choline (Alpha-GPC)
  • Alpha-glyceryl phosphoryl choline (alpha-GPC) is a naturally occurring phospholipid compound.
600mg of N-Acetyl L-Cysteine (NAC)
  • NAC is the amino acid cysteine with an acetyl group attached to it.
300mg of Caffeine
  • Caffeine contributes to an increase in endurance capacity and may help to increase alertness and concentration. Do not exceed a daily intake of 300 mg of caffeine. The beneficial effect is obtained with caffeine consumption at doses of 3 mg/kg body weight at least one hour prior to exercise.
  • 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.
JYM Supplement Science

Ratings & Reviews

Pre Jym Pre Workout
Overall Rating
9.1
4,054 Ratings
Verified Buyer Rating
9.1
3,557 Ratings
Average Flavor Rating
8.3
10 Flavors
Top Rated Flavor
8.9
Tangerine
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.
Jan 26, 2020
9
Verified Buyer
  • 9 Tangerine
Jan 14, 2020
10
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
10
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
10
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
10
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
10
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
10
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
9
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
10
Verified Buyer
  • 10 Strawberry Kiwi

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

Dec 15, 2019
10
Verified Buyer
  • 10 Cherry Limeade
  • 10 Raspberry Lemonade
Dec 04, 2019
6
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
9
 

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
10
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
 
  • 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
10
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😉

1 Size
30 Servings
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Cherry Limeade
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Price: £29.99  (£1.00 / Serving)
Flavor Rating: 8.5
Pre Workout with High Quality Ingredients

What's in JYM Supplement Science Pre Jym Pre Workout

Serving Size: 1 Scoop (26g)
Servings Per Container30
Per 26g Portion % Reference Intake
Energy (KJ) 335 kJ 15%*
Energy (kcal) 80 kcal       
Carbohydrate 3 g 1%*
Of Which Sugars 2 g **
Salt (As Sodium Chloride) 240 mg 4%*
Citrulline Malate 6 g **
L-Leucine 3 g **
L-Isoleucine 1.5 g **
L-Valine 1.5 g **
Creatine HCI (as CON-CRET®) 2 g **
Beta-Alanine (CarnoSyn®) 2 g **
Betaine (Trimethylglycine) 1.5 g **
L-Tyrosine 1.5 g **
Taurine 1 g **
Beet (Beta vulgaris) Root Extract 500 mg **
Choline Bitartrate 350 mg **
Caffeine Anhydrous 300 mg **
Alpha-Glyceryl Phosphoryl Choline (as AlphaSize®) 150 mg **
N-Acetyl L-Cysteine 100 mg **
Black Pepper (Piper nigrum) Fruit Extract (as BioPerine®) 5 mg **
* Reference Intake of an average adult (8400kJ/2000 kcal).
** Reference Intakes not established.
Other Ingredients:
Citrulline Malate, L-Leucine, Creatine Hydrochloride (as CON-CRET®), Beta-Alanine (as CarnoSyn®), Dextrose, L-Isoleucine, L-Valine, L-Tyrosine, Betaine (Trimethylglycine), Taurine, Sodium (as Disodium Phosphate), Sweeteners (Sucralose, Acesulfame Potassium), Flavouring, Beet (Beta vulgaris) Root Extract, Choline Bitartrate, Caffeine Anhydrous, Alpha-Glyceryl Phosphoryl Choline (as AlphaSize®), N-Acetyl L-Cysteine, Stabilisers (Cellulose Gum, Xanthan Gum, Carrageenan), Colour (Allura Red AC), Black Pepper (Piper nigrum) Fruit Extract (as BioPerine®).
For allergens, see ingredients in bold. Produced on shared equipment that also produces products that may contain EGG, MILK, SOYA, TREE NUTS, WHEAT.

Directions For Pre Jym Pre Workout: As a Food Supplement, mix 1 scoop of Pre JYM™ in 400 to 1000 mL of water and drink 30-45 minutes before workouts. Consider allowing Pre JYM to mix for 10-15 minutes before drinking. Also consider drinking it over the course of 15-30 minutes. Initially use 1/2 serving or less to assess tolerance. Once tolerance is assessed, take no more than 1 serving. To avoid sleeplessness, do not consume within 6 hours of bedtime.

Warnings:

Flavoured Food Supplement Powder with Amino Acids, Caffeine and Sweeteners

DO NOT USE IF YOU ARE UNDER THE AGE OF 18, PREGNANT OR NURSING, HAVE ANY KNOWN OR SUSPECTED MEDICAL CONDITIONS, ARE TAKING ANY PRESCRIPTION OR OVER THE COUNTER MEDICATIONS, OR SENSITIVE TO CAFFEINE. Consult with a qualified healthcare professional before using this or any other food supplement. Contains 300mg of caffeine per serving, the equivalent of approximately 3 cups of coffee. DO NOT USE WITH ANY OTHER CAFFEINATED PRODUCT. Too much caffeine may cause nervousness, irritability, sleeplessness and/or rapid heartbeat. Immediately discontinue use and consult your doctor if any adverse reactions occur.

Allura Red AC and Tartrazine may have an adverse effect on activity and attention in children. Do not exceed the recommended daily amount. This product should not be used as a substitute for a varied diet or a healthy lifestyle. KEEP OUT OF REACH OF CHILDREN

Manufactured in the US for: Bodybuilding.com (UK) Ltd. Units 7-8 Foster Avenue Dunstable, Bedfordshire, LU5 5TA.

* 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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