Mass JYM
JYM Supplement Science

Mass JYM

30G Protein, 30G Carbs And Nearly 5G Fat In Every Serving
The Only Mass Gainer Formulated And Used By Dr. Jim Stoppani
8.6 out of 10 (12 Reviews)
1 Size
5 Lbs.
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Apple Fritter
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Price: $54.37 ($1.75 / Serving)
Flavor Rating: 9.8
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Product Overview

Mass JYM - High-Quality Protein and Carb Blend For Max Muscle Growth

Mass JYM™ is a revolutionary mass-gain formula that has taken years to perfect. It’s the first of its kind, a true non-proprietary mass-gainer that fully discloses the specific types of protein, carbohydrates, and fat contained so that you know exactly how much of each macronutrient you’re consuming.

It’s not enough to know just the total amount of protein, carbs and fat that a mass-gainer provides – you need to know the precise amounts of each type of protein, each type of carb, and each type of fat. Otherwise, you won’t know if it’s a lean-mass-builder or just another “fat-gainer” made of cheap protein concentrate and sugar. I essentially designed Mass JYM to be Pro JYM™ plus an equal amount of carbs – primarily low-glycemic and the perfect (and patent-pending) fat blend. 

Each serving of Mass JYM provides:

  • 30g Protein (15 grams casein, 12 grams whey, 3 grams egg protein)
  • 30g Carbs (15 grams low-glycemic index (GI), 5 grams high-GI)
  • Nearly 5 grams of fat (1.3 grams saturated fat, 1.3 grams monounsaturated fat, 1.3 grams polyunsaturated fat, including 1 gram of CLA)

Mass JYM Protein Blend

Designed to the exact specifications as my award winning Pro JYM protein – each serving of Mass JYM delivers 30 grams of the highest-quality protein powder blend available. Mass JYM delivers 50% casein from micellar casein and milk protein isolate; 40% whey protein from cold-filtered whey protein isolate and milk protein isolate; and 10% egg white protein. 

This protein blend provides just enough fast-digesting whey to quickly spike muscle protein synthesis, plus adequate amounts of slow-digesting casein to keep protein synthesis elevated for several hours after ingestion. Egg white protein provides a medium-digesting protein source that also provides higher levels of sulfur-containing amino acids as compared to dairy protein.*

Research studies show that a protein blend providing more slow-digesting casein than fast-acting whey and a medium-digesting protein elevates muscle protein synthesis longer and leads to greater net protein balance than whey protein alone [1, 2].* Simply put, a protein blend is more anabolic than whey on its own.* 


Mass JYM Carb Blend

Each serving of Mass JYM contains 30 grams of carbohydrates to deliver a 1:1 ratio of protein to carbs. This is critical. Consume too many carbs, and you’ll gain body fat in addition to muscle.* Take in too few carbs, and you won’t optimize muscle growth.*The 1:1 ratio of protein to carbs helps keep the gains lean and steady.*

Mass JYM’s ratio of low-glycemic (low-GI) to high-glycemic (high-GI) carbs is another key aspect that makes this formula a true lean-mass-gainer. I designed the carb blend in Mass JYM mainly from pea starch, isomaltulose, and oat fiber to deliver a 3:1 ratio of low-GI to high-GI carbs. 

At this ratio, you won’t spike insulin (outside of a normal range) or add fat as easily as you would with a mass-gainer that uses primarily high-GI carbs like sugar, dextrose, or maltodextrin [3, 4]. It also means Mass JYM works well as a pre-workout carb source, as it provides a small amount of quick fuel followed by a larger amount of long-lasting fuel [5, 6] to help provide energy from the start of your workout all the way to the end. Research further shows that when consuming carbs before and/or during workouts, the body’s testosterone-to-cortisol ratio is higher, suggesting the body is in a more anabolic state. 

Another way carbs are essential to maximizing muscle growth has to do with muscle cell volume. Glycogen, the storage form of carbohydrates in muscle, pulls water into muscle cells. The higher the muscle glycogen content, the fuller (bigger) the muscle will be. Yet maximal muscle cell volume has more to do than just looking bigger – it also places a stretch on the muscle cell membrane that can help signal biochemical pathways leading to an increase in muscle protein synthesis, which can lead to long-term increases in muscle growth. 


Mass JYM Patent-Pending Fat Blend

Fat is the most misunderstood macronutrient. It was deemed the devil for decades before real science stepped in and showed how essential most fats are. After protein, I consider fat the second most critical macronutrient, especially if gaining muscle mass and strength is important to you.

Dietary fat is quite anabolic when you consume the right amounts and types of it in the proper balance. * This holds especially true for healthy men*. Research confirms that healthy males eating diets higher in fat, particularly saturated and monounsaturated fat, have higher testosterone levels than those eating less fat [7, 8].* Conversely, research also shows that healthy males consuming diets higher in polyunsaturated fats, compared to saturated and monounsaturated fats, have lower testosterone levels [8, 9].*

Most commercial mass-gainers use vegetable fat sources comprised mainly of polyunsaturated fats. This is the last type of fat that a healthy male trying to maximize muscle growth should be pounding down. Ideally, you want to consume a diet that provides a 1:1:1 ratio of saturated to monounsaturated to polyunsaturated fats. But good luck trying to calculate your fat percentages in addition to eating the proper total amount of fat each day.* 

With Mass JYM, I took the guesswork out of it and designed a patent-pending fat blend/creamer that provides the aforementioned 1:1:1 ratio (saturated to monounsaturated to polyunsaturated fat), including 1 gram of conjugated linoleic acid (CLA) – a special type of omega-6 polyunsaturated fat that studies have indicated simultaneously helps build muscle and strength while aiding fat loss [10, 11].* CLA provides numerous other health benefits as well, yet most people don’t get adequate amounts of it in their diets.* 


Mass JYM – The Perfect Muscle-Building Supplement

Each scoop of Mass JYM provides not only the perfect amounts of all three macronutrients, but also the ideal ratio of macro types for each one. You’ll be hard-pressed to find a more perfect supplement for building lean muscle mass and strength than Mass JYM.*

Jim Stoppani, PhD
Owner, JYM Supplement Science

JYM Supplement Science

Ratings & Reviews

Overall Rating
8.6
12 Ratings
Verified Buyer Rating
9.9
8 Ratings
Average Flavor Rating
8.6
3 Flavors
Top Rated Flavor
9.8
Apple Fritter
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.
10
Verified Buyer
  • 10 Tahitian Vanilla Bean
  • 10 Apple Fritter
9
Verified Buyer
  • 9 Apple Fritter
10
Verified Buyer
  • 10 Apple Fritter

I have used just about every gainer you can imagine this is by far the best i have ever used and i will not use anyting else!!

10
Verified Buyer
  • 10 Apple Fritter

I don't really do reviews. However I heard about this mass gainer and the label explains everything out. It was on sale and i heard about apple fritter so i gave it a shot....OMG IT IS AMAZING!! believe the hype try it out. I will buy this product again but here and there.

10
Verified Buyer
  • 9 Apple Fritter

Really impressed with Mass JYM, the wait was worth it! Apple Fritter is delicious!

10
Verified Buyer
  • 10 Apple Fritter

Best mass gainer I’ve tried!

10
Verified Buyer
  • 10 Tahitian Vanilla Bean
  • 10 Apple Fritter

Another great tasting product

10
Verified Buyer
  • 10 Apple Fritter

I don't usually write reviews but this was by far the best tasting and smoothest mass gainer I've ever tried. Keep up the good work!

2
 

Way too thick when you mix a full serving almost like drinking slug even with 16 ounces of water... highly disappointed and the taste wasn’t as good as the protein...

2
 
  • 3 Tahitian Vanilla Bean

I tried the vanilla bean flavor and really didn't like how it mixed up in my shaker cup, and the taste wasn't as good as the pro jym. I was also wondering why there is ash in the product listed as other ingredients.

10
 
  • 10 Apple Fritter

Fits perfectly in with my diet. Losing unwanted fat while maintaining muscle/strength. Apple Fritter is an amazing flavor too. It's like having a dessert every time I drink it!

10
 
  • 6 Tahitian Vanilla Bean
  • 7 Chocolate Mousse
  • 10 Apple Fritter

Awesome gainer! Not to mention then Apple Fritter is simply delicious! Vanilla and chocolate are okay. I love that it's a lean gainer with an even ratio of carbs to protein. Mostly low GI too. The CLA is a nice bonus. I find this is perfect for between meals when I want a bit more than protein alone, or as a meal replacement when I'm on the go.

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5 Lbs.
5 Lbs.
31 Servings | $1.75 Per Serving
$54.37
$63.97

What's in JYM Supplement Science Mass JYM

5 Lbs. Apple Fritter
Serving Size: 1 scoop (73g)
Servings Per Container: About 31
Amount Per Serving % Daily Value*
Calories 270       
Calories from fat 40       
Total Fat 4 g 6%**
Saturated Fat 1 g 5%**
Polyunsaturated Fat 1 g
Monounsaturated Fat 1 g
Cholesterol 20 mg 7%
Total Carbohydrate 30 g 10%**
Dietary Fiber 4 g 16%**
Sugars 10 g
Protein 30 g 60%**
Calcium 481 mg 50%
Sodium 390 mg 16%
Potassium 130 mg 4%
* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value not established.
Ingredients:
Protein Blend (Whey Protein Isolate, Micellar Casein, Milk Protein Isolate, Egg Protein), Pea Starch, Dextrose, Polydextrose, Sunflower-Based Creamer (Sunflower Oil, Maltodextrin, Micellar Casein, Soy Lecithin, Sodium Citrate, Tri-Calcium Phosphate), Isomaltulose, Conjugated Linoleic Acid (Conjugated Linoleic Acid Triglycerides, Corn Syrup Solids, Sodium Caseinate, Silicon Dioxide, Dipotassium Phosphate, Antioxidants), Coconut-Based Creamer (Coconut Oil, Maltodextrin, Food Starch, Mono-And Diglycerides, Tricalcium Phosphate), Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Salt, Natural and Artificial Flavor, Oat Bran, Ground Cinnamon, Caramel Color, Sunflower Lecithin, Sucralose, Acesulfame Potassium, Silicon Dioxide.
ALLERGEN WARNING: Contains EGG, MILK, and SOY. Produced on shared equipment that also processes products that contain TREE NUTS and WHEAT ingredients.

Directions For Mass JYM: As a Dietary Supplement, mix one to two scoops of MASS JYM™ with 10-24 oz. of cold water or milk depending on your preference for thickness and texture. Use MASS JYM at any time of day - morning, between meals, before bed, before or after workouts - as a meal supplement, to increase your total protein and caloric intake, and help maximize muscle and size gains.* 

Warnings: Do not use as a sole source of nutrition. Check with a qualified healthcare professional before taking this product if you are pregnant, nursing, under the age of 18, or if you have any known or suspected medical condition(s) and/or are taking any prescription or OTC medication(s). KEEP OUT OF REACH OF CHILDREN.

* 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.