JYM Supplement Science


24g of Pure, Quality Protein in Every Scoop with No Added Amino Acids or Filler Nutrients
A Pure Blend of High-Quality Proteins in Exact Amounts to Maximize Growth, Recovery, and Repair*
9.2  out of 10  (2,508 Reviews)

Product Overview

Pro JYM. The anabolic protein powder created and used by Dr. Jim Stoppani. High Quality Protein Blend for Maximal Muscle Growth.

"JYM Supplement Science combines real science with best-in-class ingredients and precise doses to deliver unreal results. Pro JYM is my exclusive protein blend designed to help you build muscle, recover faster, and train stronger. Whether you want to boost strength, add size, or get shredded, Pro JYM is for you. It's a powerful blend of proteins that add up to pure muscle fuel."

Grow Like a Pro

Each scoop of Pro JYM delivers 24 grams of pure, quality protein. It’s not "spiked" with single amino acids to artificially increase the protein content or made with cheap and inferior whey protein concentrate or caseinates. To make Pro JYM, I selected only the highest quality whey protein isolate, micellar casein, milk protein isolate, and egg white protein (egg albumin).

The 24 grams of protein in each scoop of Pro JYM contain the following:• Whey protein isolate: 7.5g

  • Whey protein isolate: 7.5g
  • Micellar casein: 7g
  • Egg albumin: 2.5g
  • Milk protein isolate: 7g (5.5g casein, 1.5g whey)

Since milk protein isolate is 20 percent whey protein and 80 percent micellar casein, the 24 grams of protein in Pro JYM are really broken down into three main categories:

Protein chart
A Blend is Best

While a high-quality protein powder should be at the top of everyone's supplement shopping list, don't make the common mistake of buying a pure whey protein powder right off the bat. Yes, whey protein is a critical staple for muscle growth, but to truly maximize growth, you need more than just whey. You need a precise blend of performance proteins.

Whey is a very fast-digesting protein. The rapid rate of digestion is one of whey's benefits, but on its own, this quality can actually be a downfall. Because whey digests so fast, it quickly boosts muscle protein synthesis (MPS). However, it only boosts MPS for a short amount of time.

Research now shows that when you add medium-digesting and slow-digesting proteins to whey, muscle protein synthesis remains elevated for longer than when using whey alone. Since muscle protein synthesis leads to muscle growth, elevating muscle protein synthesis for longer can have a significant impact on your overall gains.

In fact, research suggests that people who add slow-digesting casein protein to a whey protein shake around their workouts enjoy greater muscle growth over time than people taking whey alone. This research is the very reason I recommend taking a blend of fast-digesting whey protein, medium-digesting egg protein, and slow-digesting micellar casein.

Say No to Protein Spiking!

Many supplement manufacturers cut corners on their protein powders because high-quality protein is very expensive to make. They often use a dirty trick called “nitrogen spiking.” Nitrogen spiking, also called “amino spiking” or “protein spiking,” is a way to manipulate the test used to measure the protein content of protein powders.

The current method used to assess the amount of protein in a protein powder involves measuring the nitrogen content, which is then converted into protein amount. Nitrogen is used because protein is made of amino acids strung together in a chain, much like a pearl necklace, and every amino acid contains nitrogen. If manufacturers add loose amino acids to a powder, they can fool the test and deliver less pure protein than their labels claim.

Many people think that extra amino acids in their protein powder are beneficial. The major problem, however, is that certain amino acids are not added to make the protein powder more effective. Instead, they're simply added for their nitrogen. Most single amino acids, such as taurine and glycine, are much cheaper than whey protein, casein protein, milk protein, or egg protein. Even highly beneficial amino acids like BCAAs and glutamine are cheaper than protein powder. So, by adding a bunch of cheaper amino acids to their protein powders, supplement companies can boost their nitrogen content, which technically means they boost the amount of protein per serving, at least according to the nitrogen test.

Because the added amino acids are not complete proteins, the protein content of a spiked protein powder is not truly what a nitrogen test claims it is. For example, a whey protein powder may claim to contain 20 grams of protein per scoop. However, if the manufacturer added 5 grams of glycine per serving, then you are only getting 15 grams of actual whey protein and 5 grams of glycine, which would read as 20 grams of protein per serving.

An even bigger problem arises when proteins are spiked with amino acids that aren't used as building blocks to form proteins in the body. Taurine is once such amino acid. Taurine helps with energy production, so you might first be excited to see a high quantity of it in your protein. However, if 5 grams of taurine has been added to your protein powder that claims to contain 20 grams of protein per serving, you are only getting 15 grams of real protein and 5 grams of taurine. So the extra taurine comes at the expense of total protein.

If your favorite protein powder lists BCAAs, glutamine, beta-alanine, betaine (trimethylglycine), or creatine, you might think it’s a great product because of the additional nutrients. Yes, your protein contains these performance nutrients, but you may be getting them at the expense of the protein, not in addition to the protein. All those ingredients are nitrogen-containing compounds that count towards the total protein amount listed on the label. You might be getting up to 10 grams less protein per serving than listed on the label.

The rampant use of nitrogen spiking is the main reason why I list the precise amount of each protein in every 24 gram serving of Pro JYM. Whey protein isolate makes up 7.5 grams, micellar casein makes up 7 grams, and milk protein isolate makes up 7 grams, and the remaining 2.5 grams comes from egg white protein (egg albumen). That totals 24 grams from complete proteins with no added amino acids or filler nutrients.

The Power of Pro

As with every other supplement in the JYM line, I want you to know the exact ingredients and doses in Pro JYM. I want you to see that it contains nothing but a pure blend of high-quality proteins in the exact amounts needed to maximize growth, recovery, and repair. In short, I want you to grow like a pro.

Prepare to experience the power of real science, real ingredients, and unreal results.

Hit the JYM!

Jim Stoppani, PhD
Owner, JYM Supplement Science

JYM Supplement Science

Ratings & Reviews

Overall Rating
2,508 Ratings
Verified Buyer Rating
2,276 Ratings
Average Flavor Rating
14 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.
Apr 22, 2019
Verified Buyer
  • 8 S'mores

The flavor is great but you have to use a blender to actually blend the protein. It doesn't dissolve well in water or milk. you could shake this protein up for like 10 minutes and it will still just have like 75% of the scoop in clumps at the top

Apr 22, 2019
Verified Buyer
  • 10 Tahitian Vanilla Bean

what happend to Tahitian Vanilla Bean? is it discontinued ?

Apr 20, 2019
  • 10 Root Beer Float
  • 10 Banana Cream Pie
  • 10 Chocolate Mousse

These flavors are awesome! The Jym brand as a whole is never disappointing! Love it!

Apr 15, 2019
Verified Buyer
  • 8 Tahitian Vanilla Bean

Been on Jym for a few years and the new CPB is my favorite. Great in water, milk or power blender shake.

Apr 14, 2019
Verified Buyer
  • 10 Caramel Macchiato
Apr 08, 2019
Verified Buyer
  • 10 Gingerbread Cookie - Limited Edition!

I love this gingerbread I just mixed it with water I got a free sample of the vanilla at my body building show that I placed 2nd and 4th by the way and I love the stuff

Apr 05, 2019
Verified Buyer
  • 1 S'mores

So very bland. I tried Pro Jym when it first launched years ago. It was bland then, and it's still bland. I regret trying it again.

Mar 31, 2019
Verified Buyer
  • 8 Chocolate Cookie Crunch

Just finished 1st 4lb'er of Jym Pro, I use it POST-Workout - Works great. I train late at night and go to bed 1-2 hr after training. Jym Pro is great as it's very palatable, gives me the nutrients I need to recover, and also allows me to go to sleep without having a stuff 4 chicken breasts down before I go to sleep.

Mar 30, 2019
  • 7 Tahitian Vanilla Bean

Does not mix well at all. A good ratio would be 16 oz to 1 scoop, but then you don't even taste the vanilla. 1 scoop per 8 oz and you're gonna get unmixable bits that get stuck in your shaker no matter how hard you shake it AND IT'S VERY POWDERY TEXTURED. It's so thick and powdery it's like drinking quick sand. Flavor is good tho.

Mar 30, 2019
Verified Buyer

I've been using the full JYM System and support stack for almost 4 years, I highly recommend it based on results. Follow his training programs and diet (website and app) for maximum results.

Mar 20, 2019
Verified Buyer
  • 7 S'mores

Doesn't mix with water that well. Has actual marshmallows in it and if you have the free bodybuilding shaker they don't fit through the mesh unless you soak them for a long time.

Mar 20, 2019
Verified Buyer
  • 4 Chocolate Cookie Crunch
  • 10 S'mores
  • 4 Caramel Macchiato

The best thing about Pro Jym is the blend of 4 different proteins without buying 4 different products. It is a bit pricey but definitely but saves money if you only want to buy 1 protein product instead of multiple and also eliminates the question of how a self blended protein might taste. The biggest downside is no aminos which is not an issue if you invest in the entire pricey line (tons of aminos in the pre & post) or buy a separate amino supplement from a different line. A lot of people have to adjust to the texture difference vs just whey protein, it's a bit thicker like cow milk or a milkshake. After getting used to it, I no longer like the taste of straight whey products. They generally taste good and all taste even better cold and/or using milk instead of water. Not only do they help with your muscle building goals, but help curb cravings by keeping your appetite satisfied without the bloated feeling and tasting like a treat (some better than others but kind of like a milkshake). The old Chocolate Cookie Crunch was 10/10, but the new flavor does not taste like chocolate; it tastes more like the Caramel Macchiato with bits of the cookie pieces in it. The taste isn't awful unless you're expecting it to taste like chocolate, the old recipe tasted straight up like a delicious milkshake. The Caramel Macchiato flavor doesn't really taste like caramel or coffee to me. It's kind of hard to say what it tastes like. Again the flavor itself it palatable if you're not expecting it to taste what the label says. The S'mores flavor used to be my 2nd favorite (out of the ones I've tried) but now is my favorite since Jim changed the Chocolate Cookie Crunch. It tastes mostly chocolatey with a small hint of graham cracker flavor without the graham cracker grittiness. There are also little tiny marshmallows like the ones in hot chocolate packets which I love but may not be for everyone. The marshmallows are crunchy unless you let it sit and absorb more liquid. I've also tried the Cookies & Cream but decided not to rate it because it's been so long. Unless its been changed, it basically tasted like a vanilla milkshake with tiny bits of cookie (like the Chocolate Cookie Crunch). It was very good, and I wouldn't mind getting it again but prefer having chocolate everyday.

Mar 20, 2019
Verified Buyer
  • 10 S'mores
  • 7 Chocolate Mousse

My favorite protein on the market and the smores is the best flavor I've ever tried. Taste good in water, but it taste excellent in milk. The chocolate mousse is the same way, but I like using it to make a smoothie rather than as a pre-workout.

Mar 20, 2019

How many calories per scoop?

Mar 09, 2019
Verified Buyer

I've wrote a review on Pro Jym before but wanted to submit my views on the new Choc Peanut Butter. The peanut butter taste is very subtle. It sort of tastes like a Reese's peanut butter cup. Doesn't taste artificial and chemically like some other brands. Another quality flavor from Jim.

2 Sizes
4 Lbs.
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9 Flavors
Chocolate Cookie Crunch
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Price: $56.98  ($1.10 / Serving)
Flavor Rating: 9.0

What's in JYM Supplement Science Pro JYM

4 Lbs - New Chocolate Cookie Crunch
Serving Size: 1 Scoop (40g)
Servings Per Container: About 45
Amount Per Serving % Daily Value
Calories 150       
Calories From Fat 30       
Total Fat 3 g 5%**
Saturated Fat 2.5 g 13%**
Cholesterol 15 mg 5%
Total Carbohydrates 7 g 2%**
Sugars 1 g
Protein 24 g 48%**
Calcium 419 mg 40%
Sodium 210 mg 9%
Potassium 270 mg 8%
** Percent Daily Values are based on a 2000-calorie diet.
† Daily Value not established.
Protein Blend (Whey Protein Isolate, Micellar Casein, Milk Protein Isolate, Egg Protein), Coconut-Based Creamer (Coconut Oil, Maltodextrin, Food Starch, Mono- and Diglycerides, Tricalcium Phosphate), Cocoa Processed With Alkali, Cookie Pieces (Sugar, Tapioca Starch, Rice Flour, Cocoa Processed With Alkali, Palm Oil, Corn Starch, Natural Flavors, Salt, Sodium Bicarbonate, Soy Lecithin), Natural & Artificial Flavor, Salt, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Sunflower Lecithin, Sucralose, Acesulfame Potassium, Silicon Dioxide.
ALLERGEN WARNING: Contains EGG and MILK. Produced on shared equipment that also processes products that contain SOY, TREE NUTS, and WHEAT ingredients.

Directions For Pro JYM: Mix each scoop of Pro JYM in 6-12 oz. of water or milk depending on your preference for thickness and texture. Consume 1-2 scoops within 30 minutes before workouts, and 1-2 scoops within 30 minutes after workouts. Also consider taking 1-2 scoops when you first wake up each day and before going to bed for maximizing lean muscle mass gains. You can also consume 1-2 scoops between regular meals.

Warnings: Do not use as a sole source of nutrition. Do not exceed the recommended daily dose. Keep out of reach of children. Check with a qualified healthcare professional before taking this product if you are pregnant, nursing a baby, under 18 years of age, or if you have any known or suspected medical condition(s) and/or are taking any prescription or OTC medication(s). Concerning California Residents: This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm.

* 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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