Pro JYM Protein Powder
JYM Supplement Science

Pro JYM Protein Powder

Protein powder blend of premium sources and ingredients for longer lasting growth helping athletes get bigger, stronger, and leaner.*
Pro Jym Protein packs Dr. Jim Stoppani's premeir protein formula of 4 must have proteins: whey protein isolate, micellar casein, milk protein isolate, and egg white protein for a full stack of amino acids and muscle building greatness.*
9.2  out of 10  (2,826 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

Pro JYM Protein Powder
Overall Rating
2,826 Ratings
Verified Buyer Rating
2,541 Ratings
Average Flavor Rating
16 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.
May 04, 2021
Verified Buyer

The flavor and mixability are impressive. The combination of egg, whey; casein protein is interesting; and likely beneficial for muscle development. The overall ingredients, including mini-marshmallows, lowers my rating a bit.

Apr 27, 2021
Verified Buyer
  • 9 Chocolate Cookie Crunch

One of the best tasting proteins! I love cookies, so the Chocolate Cookie Crunch flavor hits the spot. This protein also blends well without adding volume to my smoothies. --BBcom Employee

Apr 15, 2021
Verified Buyer
  • 10 Rocky Road

Best testing quality protein I’ve ever had and I’ve tried a lot. 8-9 years of training in the gym consistently and I can tell you these products are quality and effective at building muscle and strength. Take advantage and buy them while they’re on sale, they are rarely marked down.

Mar 20, 2021
Verified Buyer
  • 3 S'mores

I am rating this as 7 because of what it is, this will be the last time I trust American reviews on flavours, absolutely disgusting, gritty, like drinking weetabix with sugar cubes, now I'm stuck with 1.8kg worth of powder. It's fine, I can suck it up, but you guys have too low standards if you think this flavour deserves to have the most stars, I dont even want to know how awful are the rest of them.

Mar 18, 2021
Verified Buyer
  • 10 Chocolate Cookie Crunch
  • 8 Vanilla Peanut Butter Swirl
  • 9 S'mores

What a quality, ive been using this product a while and it has all i need , chocolate cookies crunch , whith the pieces of crunch amazing either as a shake or adding it with the oats in my breakfast 🍳🙏🤍

Mar 06, 2021
  • 9 Tahitian Vanilla Bean

You can actually recreate this formula without all the additive garbage and with better proteins at True Nutrition. Cost a bit more, it's pure...

Mar 06, 2021

Great taste great product. If you need up to 50 % Off on whey protein use this c ode ASAD-ROO on my protein com while signup

Mar 03, 2021
  • 10 Chocolate Mousse

I've been using this for a little over a week now and I'm loving it! I'm starting to feel great while using it to get some extra protein everyday and the flavor is excellent. Chocolate Mousse tastes like an actual milkshake when used with milk and with water you get a chocolate milk-like flavor.

Mar 01, 2021
Verified Buyer
  • 2 Tahitian Vanilla Bean

I have just received this product and used it right away along with the other product from JYM stack. first thing I noticed is, where is the Vanilla ?? I'm really disappointed with the test but cannot judge yet for the overall product.

Feb 27, 2021
Verified Buyer
  • 10 S'mores

One of the best protein powders on the market. S’mores taste is crazy good, it’ll definitely having you want more. Awesome to kill that sweet tooth urge plus it digests well. I’ve bought this product numerous times

Feb 26, 2021
Verified Buyer
  • 3 Tahitian Vanilla Bean

I’m not sure what I am doing wrong with this stuff, but it does not mix worth a dang, at least compared to my Gold Standard. It doesn’t matter if I mix it with water, milk, use a blender bottles, or a blender, it doesn’t mix. My workout alone could be just mixing this stuff. Even in my blender, after I run it, there is protein mix stuck to the side of the blender. It turns into a paste. It has good flavor, but the little chunks don’t really help. I don’t get it. I was excited to try this but I was disappointed. I guess I’m glad it works for others.

Feb 24, 2021
Verified Buyer
  • 10 Rocky Road
  • 9 Chocolate Cookie Crunch
  • 9 Tahitian Vanilla Bean

Great product. Buy far the best tasting protein I have ever had. The vanilla is the first vanilla protein that I have had a actually tastes like vanilla. The Rocky road is my favorite so far. I just wish you could buy it in larger amounts like a 10 pound bag.

Feb 22, 2021
Verified Buyer
  • 10 Vanilla Peanut Butter Swirl

When will the vanilla peanut butter swirl be available again? It's the best one in my opinion. Can't wait to buy it again

Feb 15, 2021
Verified Buyer
  • 10 Vanilla Peanut Butter Swirl


Feb 09, 2021
  • 9 S'mores

Tasteful and no much sugar. Fast digesting without problem. Egg protein% is very low. For muscle gains, there are better brands.

2 Sizes
907 Grams
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7 Flavors
Chocolate Cookie Crunch
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Price: £26.33  (£1.14 / Serving)
Flavor Rating: 9.0


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Pro Jym Protein packs Dr. Jim Stoppani's premeir protein formula of 4 must have proteins: whey protein isolate, micellar casein, milk protein isolate, and egg white protein for a full stack of amino acids and muscle building greatness.*

What's in JYM Supplement Science Pro JYM Protein Powder

2 Lbs. Chocolate Cookie Crunch
Serving Size: 1 Scoop (40g)
Servings Per Container: About 23
Amount Per Serving % Daily Value
Calories 150       
Total Fat 3 g 4%**
Saturated Fat 2.5 g 13%**
Cholesterol 15 mg 5%
Sodium 210 mg 9%
Total Carbohydrate 7 g 3%**
Dietary Fiber 1 g 4%
Total Sugars 1 g
Includes 0g Added Sugars 0%
Protein 24 g 48%**
Calcium 419 mg 32%
Iron 1 mg 6%
Potassium 270 mg 6%
** 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.
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.
Contains: SOY, EGG and MILK. Produced on shared equipment that also processes products that contain TREE NUTS, and WHEAT ingredients.

Directions For Pro JYM Protein Powder: 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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