Added to Cart
Cart Total:
Customers Also Bought:
24/7 Help

Cytosport, Inc, Monster Mass, Mass Gaining Formula with Mtor Activators, Chocolate, 5.95 lbs (2700 g) (Discontinued Item)

$61.76 $61.76 (Saved $22.73)

Thank you!

Your email is being processed.

Cytosport, Inc, Monster Mass, Mass Gaining Formula with Mtor Activators, Chocolate, 5.95 lbs (2700 g) (Discontinued Item)


Earn 5% Loyalty Credit ?

Cytosport, Inc, Monster Mass, Mass Gaining Formula with Mtor Activators, Chocolate, 5.95 lbs (2700 g) (Discontinued Item)

Out of Stock - Discontinued
  • Shipping Weight:
    7.98 lbs
    Switch to Metric units
  • Product Code: CYT-79520
  • UPC Code: 660726795200
  • Dimensions:
    7.7 x 7.7 x 11 in, 6.75 lbs
    Switch to Metric units
Product Overview


  • New Powerful Formula
  • Building Athletes from the Inside Out
  • Taste Satisfaction Guaranteed
  • Naturally & Artificially Flavored
  • Protein Supplement
  • 50 g Protein
  • 4 g Added L-Leucine
  • 250 mg Aminogen
  • *Manufactured Free of Banned Substances in a NSF GMP for Sport Registered Facility
  • Pre / During / Post

*Our products are manufactured in compliance with NSF International's GMP for Sport Registration, including semi-annual audits, verifying that no NSF 306-Certification Guideline Annex A List banned substances exist in our facility.

Nutrition Highlights
Protein Carbs Calories L-Leucine†
50 g 74 g 600 8.4 g
†Amino Acid totals include amino acids from complete proteins.

Mass Gaining Formula with mTOR Activators

Science confirms what athletes have always known: high quality calories and protein intake is linked to muscle size and strength. Monster Mass is a macronutrient dense gainer designed to maximize lean mass gains.

50% More Leucine††

Monster Mass is fortified with 4 grams of added L-Leucine to drive an industry leading 3:1:1 Ratio of BCAAs

3 Leucine : 1 Isoleucine : 1 Valine

Recent university research shows that Leucine enriched beverages consumed with exercise synergistically activates and prolongs activity of mTOR signaling pathway, which increases muscle anabolic potential (muscle growth).¹²³

††Monster Mass contains 50+% more leucine per gram protein than typical protein powders.

¹ Dreyer et al. Am J Physiol Endrocrinol Metab 294:E392-E400 (2008)
² Fujita et al. J Phuysiologuy 582 (2):813-23 (2007)
³ Koopman et al. Am J Physiol Endocrinol Metab 288:E645-53 (2005)

50 g Protein Matrix 0-2 Hours
Rapid Release Proteins
Whey protein concentrate, whey protein isolate, whey protein hydrolysate
2-6 Hours
Sustained Release Proteins
Whey protein concentrate, milk protein isolate, micellar casein, caseinates
600 Calories Macronutrient dense formula for maximizing lean mass gains.
4 g Added L-Leucine For mTOR pathway activation (muscle protein synthesis)
2 g Added L-Glutamine To enhance muscle tissue recovery/repair
250 mg Aminogen Digestive enzyme complex for efficient protein digestion and utilization
Carbohydrates Drive Protein Utilization Carbohydrates trigger insulin production which in turn helps drive amino acid uptake and utilization by muscle tissues

Since we founded CytoSport in 1998, we've been dedicated to working with sports scientists, coaches and trainers to redefine protein enhanced products for active lifestyles and serious athletes - supporting performance when it matters.

Over the years, we've expanded to create a comprehensive line that encompasses the athletic experience from preparation, to hydration, to recovery. Our products are among the very few that are manufactured in a NSF International GMP for Sport Registered facility. Our facilities are also inspected and regulated by the FDA. We carefully manufacture our powder products and ready-to-drink pre-blends onsite at our corporate campus in Benicia, California.

Making efficacious products for athletes and active lifestyle individuals requires responsibility on all fronts. As our business has grown, so has our footprint. We have made environmental sustainability a focus and driver in everyday decision making.

Through it all, CytoSport has been committed to one thing, building athletes from the inside out.

Greg and Mike Pickett, Father/Son

Suggested Use

Mix 4 scoops (150 g) into 18-20 fl-oz water

The optimal time for a serving of Monster Mass is 30-45 minutes immediately after your workout. This timing is critical because your muscles absorb approximately 80% of the aminos and carbs necessary to help them grow during the two hour period immediately following exercise. Depending on your weight gain and caloric needs take Monster Mass as a snack or as a meal addition.

CytoSport products complement a healthful eating and hydration plan that, when combined with a balanced exercise program may contribute to healthy weight management and recovery from exercise.

Use as part of a well-balanced diet that includes whole foods and other protein sources.

Other Ingredients

Maltodextrin, rapid release protein blend (whey protein concentrate, whey protein hydrolysate, whey protein isolate, L-leucine, L-glutamine), sustained release protein blend (milk protein concentrate and/or isolate, micellar casein, calcium and sodium caseinate), waxy maize starch, lean lipids (sunflower oil, canola oil, medium chain triglycerides), alkalized cocoa powder, natural and artificial flavor, soluble corn fiber, fructo-oli-gosaccharides, potassium chloride, tricalcium phosphate, acesulfame potassium, sucralose, lactase, bromelain, papain, soy lecithin.

Contains ingredients derived from milk and soy.

This product is manufactured in a facility that processes milk, soy, wheat and eggs.


Do not use this product as your sole source of nutrition.

Supplement Facts
Serving Size: 150 g (approx 4 scoops)
Servings Per Container: approx 18
  Amount Per Serving % Daily Value*
Calories 600  
Calories from Fat 110  
Total Fat 12 g 18%
Saturated Fat 4.5 g 23%
Trans Fat 0 g  
Cholesterol 85 mg 28%
Sodium 170 mg 7%
Potassium 780 mg 22%
Total Carbohydrate 74 g 25%
Dietary Fiber 7 g 28%
Sugars 7 g  
Protein 50 g 100%
Vitamin A (as vitamin A acetate)   35%
Vitamin C (as ascorbic acid)   35%
Calcium   70%
Iron (as ferrous fumarate)   40%
Vitamin D (as cholecalciferol)   35%
Vitamin E (as dl-alpha tocopheryl acetate)   40%
Thiamin (as thiamin mononitrate)   30%
Riboflavin   35%
Niacin (as niacinamide)   35%
Vitamin B6 (as pyridoxine hydrochloride)   35%
Folate (as folic acid)   35%
Vitamin B12 (as cyanocobalamin)   35%
Biotin   35%
Pantothenic Acid (as d-calcium pantothenate)   40%
Phosphorus   60%
Iodine (as potassium iodide)   50%
Magnesium (as magnesium oxide)   45%
Zinc (as zinc oxide)   35%
Copper (as copper gluconate)   35%
Chromium (as chromium nicotinate)   80%
L-Leucine 4 g **
L-Glutamine 2 g **
Aminogen (digestive enzymes) 250 mg **
*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
**Percent Daily Value not established.

Typical Amino Acid Profile per 4 scoops 150 g (50 g Protein)
Essential BCAA
L-Isoleucine 2,495 mg
L-Leucine 8,465 mg
L-Valine 2,560 mg
L-Tryptophan 710 mg
L-Lysine 3,810 mg L-Threonine 2,370 mg L-Phenylalanine 1,625 mg L-Methionine 955 mg
Amino Acids
Non-Essential L-Alanine 1,830 mg L-Arginine 1,110 mg L-Glycine 775 mg L-Aspartic Acid 4,135 mg
L-Glutamine & Precursors 10,215 mg L-Cysteine 945 mg L-Histidine 945 mg
L-Tyrosine 1,570 mg L-Proline 3,310 mg L-Serine 2,175 mg
Oxygen, Nitrogen, Hydrogen, Carbon, Sulfur