Pre JYM Review – How Does This Pre-Workout Measure Up?

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By Thomas Youngerman

Reviewed by Juliana Tamayo, MS, RDN - Last Updated

Pre JYM Review

The global sports nutrition market is estimated at more than $10 billion annually and poised for continued explosive growth with an estimated CAGR (compounded annual growth rate) of nearly 11%. These dramatic increases are fueled by consumers’ focus on self-care, preventative measures, and a renewed commitment to overall fitness. The home fitness industry is skyrocketing with fitness apps, digital platforms such as Tonal and the Mirror, and equipment brands such as Peloton, Nautilus, and NordicTrack in demand. Historically people turned to their gyms or personal trainers for information and advice about sports nutrition products.

Today, that information can be found online, and several industry experts have stepped up to meet that demand. One such expert is Dr. Jim Stoppani, a Ph.D. in exercise physiology, former senior science editor for several major fitness magazines, and founder of JYM Supplement Science. In this article, we’ll take a look at JYM Supplement Science’s best-selling product, Pre JYM. This pre-workout powder is designed to provide you with all the energy and fuel you need for your best workout.

Does it live up to the hype? Let’s find out in this complete review of Pre JYM!

About JYM Supplement Science

When researching our product reviews, it always amazes and sometimes concerns us when we cannot learn about the ownership of a brand or the key individuals behind the company. Such is not the case with JYM Supplement Science. Jim Stoppani is the owner and the driving force behind the company. He is the product formulator, the writer, the YouTuber, and the general of the JYM Army. He has become one of today’s most well-known and trusted experts in the fitness, nutrition, and exercise science industry. 

JYM Supplement Science

About Dr. Jim Stoppani

The honorific, Dr. Stoppani is real. He received his Ph.D. in exercise physiology with a minor in biochemistry from the University of Connecticut. After completing his doctorate, Stoppani served as a postdoctoral research fellow at Yale University School of Medicine. He conducted groundbreaking (award-winning) research on the effects of exercise and diet on gene regulation in muscle tissue. 

In 2002 Dr. Stoppani joined the editorial staff at Weider Publications, where he served as Senior Science Editor for Muscle & Fitness, FLEX, and Muscle & Fitness Hers magazines. During this period, Weider Publications was the “voice” in the fitness and nutrition space. After his stint with Weider, Dr. Stoppani created his sports nutrition company, JYM Supplement Science. He has authored or co-authored several New York Times Bestsellers to include the Encyclopedia of Muscle & Strength, LL Cool J’s Platinum 360 Diet and Lifestyle, and Stronger Arms & Upper Body.

Dr. Jim Stoppani

View any of the plethora of Stoppani YouTube videos, and you will immediately notice Jim Stoppani is the real deal; he lives the lifestyle, walks the talk, and looks the part. His motto is “Do the Right Thing.” 

JYM Supplement Science Philosophies 

Doing the “right thing” includes adhering to strict, go-to-market strategies that exemplify a best-in-class approach to sports supplementation. The points below represent the Stoppai philosophies and are hallmarks of what we consider a reputable sports nutrition company in our product reviews and “Best Of” articles:

  • All JYM products are produced in a cGMP facility.
  • There are no “proprietary blends” – every ingredient and its dosage are fully transparent on the product’s Supplement Facts panel. 
  • Dr. Stoppani believes in clinically tested, patented ingredients, such as Con-Cret Creatine HCL, CarnoSyn Beta-Alanine, AlphaSize, and BioPerine, at the clinically validated dosages. For example, due to its superior absorption and bioavailability, Creatine HCL is tested at 2 grams versus Creatine Monohydrate at 3 grams or more. 
  • Pre JYM is third-party tested and certified as Safe for Sport by Informed Choice and Informed Sport. Guaranteed no false-positive tests for banned substances. 

The Pre-Workout Energy Myth 

Within sports nutrition, one of the largest and fastest-growing segments is the pre-workout market, comprised of energy drinks, powders, and pills. For many, the function of a pre-workout is primarily energy, a product to get them amped up before going to the gym. The market has plenty of potent energy drinks guaranteed to get you jacked. These products are available in your health food store, nutrition specialty shop, even convenience stores. Manufacturers continue to churn out stronger formulas with more potent energy components, delivering more jitters, abnormal heart rhythms, and a mid-workout crash! 

We believe, however, an effective pre-workout should deliver far greater benefits than energy alone. 

What to Look for in a Pre-Workout Product

In addition to the energy component, a true pre-workout should provide the right nutrients in adequate doses to stimulate gains in strength, endurance, and lean muscle. Below we list several of these key muscle-enhancing ingredients, each clinically proven effective, at the dosages listed:

  • Creatine (3 gm)
  • Beta-Alanine (2 gm)
  • BCAAs (6 gm)

Vasodilation is another essential benefit that should be a part of your pre-workout formula:

  • L-Arginine (250 mg)
  • Citrulline (6 gm)

Finally, mental focus can enhance your workout intensity.

About Pre JYM Pre-Workout

To quote the Jym Supplement Science website, “Put simply, Pre JYM is the most effective pre-workout supplement ever developed. It’s built on solid science, years of study, 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.” 

Nothing new here. We expect every manufacturer to hype their products with such statements. However, as previously stated, there are no proprietary blends in Pre JYM, the product is third-party tested and certified, the label is totally transparent, all thirteen active ingredients are identified, and the dosage of each is listed, there are four patented and trademarked ingredients, each at the clinically tested amount. There are no abbreviated formulas or concentrates. 

Pre JYM comes in several flavors on the company website, including Grape Candy, Pineapple Strawberry, Strawberry Kiwi, Black Cherry, and Tangerine. We have tried several flavors to date, all tolerable; in fact, they taste great for a pre-workout product. 

Pre JYM Pre-Workout

The only complaint with Pre JYM is that the standard size is a twenty-serving jar versus the normal thirty servings we have come to expect. The twenty serving size at $37.99 is among the more expensive pre-workouts on the market. A thirty-serving tub is available at $48.99.

Pre JYM Ingredients

How Well Does Pre JYM Perform? The short answer is, Pre JYM performs remarkably well. See below for a comprehensive list of the thirteen active ingredients. 

Pre JYM Ingredients

Energy Component

Caffeine (300 mg) is the only true stimulant in Pre JYM. However, caffeine is also proven to provide performance benefits – it increases muscle strength, muscle endurance and blunts muscle pain during workouts allowing one to go longer and more intensely. The product also includes the amino acid L-Tyrosine (1,500 mg).

When caffeine and L-Tyrosine are formulated with the mental focus components, Huperzine and Alpha GPC, the result is a clean, steady, prolonged energy with no jitters and no crash.

Muscle Building Components

Pre JYM contains each of our primary strength ingredients at almost precisely the dosages we cite above. Coincidence? Absolutely not. Ingredients are dosed at the amount proven effective in clinical trials. The one exception is creatine. Pre JYM uses Creatine HCL (Hydrochloride – as made famous by Con-Cret brand). Due to its superior absorption, HCL uses 2 grams per serving versus 3 grams for creatine monohydrate. 

  • Creatine HCL – 2 grams
  • Beta-Alanine – 2 grams
  • Citrulline Malate – 6 grams
  • BCAAs – 6 grams (in the correct 2:1:1 ratio)
  • Betaine – 1.5 grams

Mental Focus Components

  • Huperzine (15 mcg)
  • Alpha-GPC (150 milligrams)

Additional ingredients in Pre JYM, Dosage, and Function

  • N-Acetyl L-Cysteine – 600 mg – antioxidant properties
  • Beet Root Extract – 500 milligrams – vasodilation
  • Taurine – 1 gram – an antioxidant that also supports strength and endurance
  • BioPerine® Black Pepper Extract – 5 mg – for improved absorption

Pre JYM Dosage

The prescribed dosage is one level scoop, about 26 grams of product, delivering 70 calories, and 2 grams of carbs, one from added sugars. When first starting with Pre JYM, the company suggests you take one-half scoop to observe your response and titrate up until one scoop is well tolerated.  The company recommends you take the product 30 – 45 minutes before your workout. No more than one serving per day is recommended, and to avoid sleeplessness, the product should not be taken within six hours of bedtime.

Those practicing intermittent fasting should know that taking Pre JYM will break your fast; however, the product should be well within range to maintain a state of ketosis. 

Pre JYM Benefits

The science-backed Pre JYM formula provides significant benefits in addition to building lean muscle and strength:

  • Energy
  • Endurance
  • Mental focus
  • Muscle pumps and vascularity

For optimal results, Pre JYM needs to be taken consistently to achieve the muscle and strength-building benefits. Creatine and Beta-Alanine are the active ingredients that must reach a minimum threshold in the muscle to provide their benefits. Although the website states, the product must be taken daily, even on non-training days, taking the product five days per week before exercise has delivered excellent results. 

Pre JYM Pre-Workout-Muscle pumps and vascularity

How Does Pre JYM Perform?

Our opinion is that this formulation meets or exceeds expectations. You will feel the energy, mental focus will be enhanced, your strength and endurance will increase with continued usage, and you will see muscle pumps and vascularity. Customer reviews on the website and other eCommerce platforms echo this opinion.

Is Pre JYM Safe?

Some people may have side effects with any pre-workout product containing caffeine, creatine, and vasodilators. 

Creatine brings more water into the muscle; however, creatine monohydrate may also result in water retention under the skin resulting in a “puffy” look. Further, some people using monohydrates complain of stomach issues. The Creatine HCL in Pre JYM minimizes or eliminates these issues.

Caffeine may cause jitters. The amount in Pre JYM is roughly equivalent to two-three cups of coffee. Experts agree that 200–300 mg of caffeine a day is a relatively moderate amount for adults. To avoid sleep issues, do not take within six hours of going to bed. 

Beta-Alanine is known to cause an unpleasant tingling sensation for some people. 

Given the potential for these issues, the company recommends starting with one-half serving to determine your tolerance to these ingredients. 

As with any new supplement, particularly one as potent as Pre JYM, we recommend you discuss its usage with your healthcare provider before adding the supplement to your regimen.

Stacking Pre JYM with Other Stoppani Products

Pre JYM is designed to be stacked with other Stoppani products for synergistic benefits. Post JYM, the BCAA Recovery Matrix is obvious. For those who tolerate test boosters, the Alpha JYM is a superior formula. There is a Fast-Digesting Carb product to be combined with Post JYM for those interested in shuttling nutrients into the muscle post-workout. Other Stoppani products:

  • VITA – Multi-Vitamin
  • ZMA – Zinc, Magnesium and Vitamin B6
  • SHRED – Fat Burner
  • SS8 – an Advanced Formula Fat Burner
  • Pro JYM – Blended Protein (Whey Isolate, Milk Isolate, Micellar Casein, and Egg White protein)
  • Mass Gainer
  • Iso JYM – Clear Whey Isolate
  • Omega Fish Oil

Stacking Pre JYM with Other Stoppani Products

The Stoppani website has recommended stacks depending on your specific needs and objectives, such as the Fat Loss Stack or Muscle Building Stack. The site also offers apparel, shakers, trinkets, and eBooks.

Where to Buy Pre JYM

Fortunately, the days of the exclusive are over. JYM supplements are now available extensively in both brick-and-mortar and online.

Brick and Mortar

Pre JYM can be purchased at pecialty shops GNC and Vitamin Shoppe. 


Pre JYM can be purchased online at,,,,

JYM Supplement Science Website

Membership on confers certain benefits, such as free shipping, access to workout plans, and a personal representative to answer questions, provide guidance and motivation.

Final Thoughts on Pre JYM

We love Dr. Stoppani’s pedigree and the fact he lives the fitness lifestyle. The company’s go-to-market strategy is what we expect from a best-in-class nutritional supplement company. Yes, search the web, and you will find detractors, but typically there is a secondary agenda. 

Pre JYM delivers on its promises.

Overall Rating:
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Thomas Youngerman

Thomas Youngerman is an entrepreneur and author in the health and wellness space with extensive experience in the supplement industry. He has owned multiple sports nutrition stores and served as the Category Manager and Director of Business Development for a regional chain of nutrition stores. Thomas created a successful line of men’s healthy aging supplements that was distributed in GNC, The Vitamin Shoppe, and Kroger, and later sold to a West Coast corporation. Thomas was previously a certified nutrition coach. He has a strong understanding of nutrition, supplement formulations, DSHEA, cGMP, and FDA regulations.

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