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  (2,453 Reviews)
2 Sizes
4 Lbs.
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10 Flavors
Chocolate Cookie Crunch
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Price: $56.98  ($1.10 / Serving)
Flavor Rating: 9.0

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
2,453 Ratings
Verified Buyer Rating
2,231 Ratings
Average Flavor Rating
13 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.
Dec 15, 2018
No written review.
Dec 11, 2018
  • 10 Root Beer Float

I bought the root beer float 4 lb. I like root beer and just wanted a good protein. Anyways I REALLY like it. I don't understand how it's rated so low. I mix like a scoop and a half with 24 oz of unsweetened almond milk and it literally tastes like a root beer float with melted ice cream. It's sorta frothy and is just really good. Maybe with water its nasty IDK! I'm excited to try the Smore one next.

Dec 07, 2018
Verified Buyer
  • 10 Chocolate Cookie Crunch

Love this protein. It's been my go to protein for quite awhile now. The chocolate cookie crunch is AMAZING!

Dec 05, 2018
Verified Buyer
  • 10 Cookies & Cream
Dec 04, 2018
Verified Buyer
  • 9 Cookies & Cream
  • 10 Chocolate Mousse
  • 7 Banana Cream Pie
  • 8 Chocolate Cookie Crunch
  • 3 Root Beer Float
  • 8 Tahitian Vanilla Bean
Dec 02, 2018
Verified Buyer
  • 7 Root Beer Float
  • 8 Chocolate Cookie Crunch
  • 8 S'mores
  • 9 Banana Cream Pie

Tried most of the flavours, I found that they don't mix very well if you don't have a blender ball or a shaker with something in it to mix it. The Red Velvet cake is probably the worst taste, the ingredient profile is about the best thing going for them. I found the newer batches don't mix like they used to

Nov 27, 2018
  • 2 Chocolate Mousse

This flavour sucks, mix it with a scoop of peanut butter to hide the taste works like a charm , find it gassy on the stomach though. Have to blend it to get a nice consistency

Nov 26, 2018
  • 4 Banana Cream Pie

Honestly I just don't like it. Does not mix well and is way too chalky and way too sugary. Isoure and Dymatize Iso 100 are so much better. Would not recommend this protein. No offense Jim.

Nov 20, 2018
Verified Buyer
  • 10 Caramel Macchiato
  • 10 S'mores
  • 8 Chocolate Cookie Crunch

JYM Protein is the best I've had! Effective and a perfect blend of various proteins (whey, casein and egg white). Very filling and delicious. The flavors are strong, sweet and go above and beyond. The caramel macchiato - You can definitely taste the caramel and see the coffee grind, S'mores - Has little marshmallows in the mix, it's a great surprise (the marshmallows taste like those in lucky charms) and the Chocolate cookie crunch - has bits of chocolate chip cookies in the mix. Yes, you read that right. The protein blend is already excellent, but adding these textures definitely adds to the game. Pro JYM is worth the investment. I purchased more flavors that I haven't' tried yet, but I will definitely come back to review them.

Nov 16, 2018
Verified Buyer
  • 7 Root Beer Float

I love root beer soda and also the real root beer float. So I bought it when I saw it on promo Buy 1 Get 1. I rated it (Root Beer Float) 7 because of the following reasons below: Taste: > Water: 1/10 - Awful! I almost puke WHILE drinking it even though I put a lot of ice. If I puke, maybe I'll rate it 0. > Milk: 8.5/10 - Taste good but not the best. Syntha-6 Chocolate Milkshake is my favorite tasting protein. Which is around 9.5 for me. So this root beer float mixed with Milk still taste great! Imagine the difference with milk and water. Haven't tried it with Almond milk yet. Will I buy it again? Yes-only if there is a promo for Buy 1 Get 1. I think it is not worth it for its original price since the 2lbs tub has 25 servings. Each scoop is around 36g but you only get 24g of Protein (67% protein per serving). Most of it are garbage flavorings.

Nov 14, 2018
Verified Buyer
  • 2 Banana Cream Pie
  • 2 Red Velvet Cake
  • 10 Tahitian Vanilla Bean
  • 9 S'mores
  • 9 Chocolate Mousse
  • 8 Caramel Macchiato
  • 8 Chocolate Cookie Crunch

Overall the Jym system is the best, all quality ingredients and dosed properly. Loe all his stuff. If were going on taste though Vanilla, chocolate mousse, smores, cookie crunch all great(vanilla is my favorite). on the other hand....... Banana- taste like *** Red velvet cake- taste like hot dog water

Nov 12, 2018
Verified Buyer
  • 9 Red Velvet Cake
  • 9 Banana Cream Pie
  • 10 Tahitian Vanilla Bean
  • 10 Caramel Macchiato
  • 9 Root Beer Float
Nov 12, 2018
Verified Buyer
  • 10 Root Beer Float

Flavor tastes exactly like what it sounds like, solid taste Mixes okay with a blender bottle

Nov 08, 2018
Verified Buyer
  • 9 Root Beer Float

When I saw the B1G1, I was pumped. Then I read all of the reviews and saw the flavor rating for the root beer float. I ordered the B1G1 despite the poor reviews. I just tried my first serving and you guys have it all wrong. The root beer float is a solid 9. I mixed it with milk (very easily) and it's pretty delicious. It tastes exactly like a root beer float. So, if you like root beer floats, get this flavor. If not, don't.

Nov 03, 2018
Verified Buyer
  • 10 Root Beer Float

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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