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Mass XXX Chocolate

GNC Pro PerformanceUpdated April 2026

Product Information

Form
Powder
Servings Per Container
14
UPC
0 48107 07645 0
Product Type
Amino acid/Protein
DSLD Entry Date
2015-02-25

Target Groups

Adult (18 - 50 Years)

All Ingredients

IngredientAmount% DV
Calories990 {Calories}
Total Fat6 Gram(s)9%
Cholesterol110 mg49%
Sodium620 mg36%
Potassium1350 mg60%
Total Carbohydrates124 Gram(s)41%
Protein50 Gram(s)
Vitamin A0 NP20%
Vitamin C0 NP6%
Calcium0 NP100%
Iron0 NP30%

† Daily Value not established.

Label Statements

Brand IP Statement(s) re: (c), (TM), (SM)

GNC Pro Performance(R) Mass XXX(TM) is GNC's first clinically studied mass builder. Serious athletes know that while trying to achieve muscle mass and strength gains, proper sports nutrition is a must. GNC Pro Performance(R) Mass XXX(TM) has proven this concept and has shown to increase lean mass, muscular strength and endurance with 40% fewer repetitions.* It also improves efficiency for strength, endurance and mass gains.* GNC Pro Performance(R) Mass XXX(TM) is the right nutrition formula to help you meet your nutritional needs and keep you fueled while working towards gaining muscle mass and strength.

General Statements: All Other Content

3 SETS + MASS XXX(TM) = 5 SETS EQUAL GAIN IN MASS, MUSCLE STRENGTH AND ENDURANCE*

General Statements: All Other Content

TYPICAL AMINO ACID PROFILE PER SERVING: Alanine 2151mg Arginine 1673mg Aspartic Acid 5048mg Cystine 993mg Glutamine 8877mg Glycine 1068mg Histidine 1113mg Isoleucine^ 2892mg Leucine^ 4968mg Lysine 4106mg Methionine 1058mg Phenylalanine 1960mg Proline 3099mg Serine 2549mg Threonine 2877mg Tryptophan 937mg Tyrosine 1733mg Valine^ 2898 mg Total 50000mg ^Indicates Branched Chain Amino Acid (BCAA)

Brand IP Statement(s) re: (c), (TM), (SM)

In an eight week randomized, double-blind, placebo-controlled study of healthy male volunteers, 18 subjects completed 3 sets resistance training (RT) daily + GNC Pro Performance(R) Mass XXX(TM), and 16 subjects performed 5 sets RT daily with no supplement. After eight weeks, subjects on GNC Pro Performance(R) Mass XXX(TM) showed equal gains in body weight, fat free mass (FFM), maximal muscle strength (MMS) and muscle endurance (ME) with only 3 sets RT per day compared to the control group who completed 5 sets RT per day.

General Statements: All Other Content

While working to achieve mass gains, it is essential that you get enough calories, including a balance of quality carbohydrates, protein and fat. Falling short on any of these nutrients can obstruct your performance goals.

General Statements: All Other Content

Amino Acids are needed to build the various proteins used in the growth, repair and maintenance of body tissues such as skin, bones and muscle. BCAA help fuel your skeletal muscles, preserve muscle glycogen stores and help to reduce the amount of protein breakdown. Adding BCAA to your diet can be anti-catabolic and have a protein=sparing effect. Arginine is an essential precursor of nitric oxide and is involved in the body's natural formation of creatine.

Brand IP Statement(s) re: (c), (TM), (SM)

In addition, GNC Pro Performance(R) Mass XXX(TM) contains a special blend of carbohydrates, the body's primary source of energy.

General Statements: All Other Content

ULTIMATE LEAN MASS BUILDER

General: Product/Version Code

CODE 350858 EJG

Suggested/Recommended/Usage/Directions

DIRECTIONS: Mix 4 level scoops (198g) with 16 ounces of cold water or milk. Consume 1-2 servings daily.

General Statements: All Other Content

Carbohydrates are an important fuel during intense or high intensity exercise. Carbohydrates also replenish energy stores after high intensity exercise. Furthermore, the combination of dietary protein with carbohydrates following resistance exercise supports muscle protein synthesis.

General Statements: All Other Content

CLINICALLY PROVEN TO BUILD MUSCLE MASS WITH 40% FEWER REPS

General Statements: All Other Content

Natural and Artificial Flavor

Seals/Symbols

CLINICALLY RESEARCHED

General Statements: All Other Content

Two cups of reduced fat milk provides an additional 240 calories, 9g total fat (6g saturated fat), 36mg cholesterol, 250mg sodium, 750mg potassium, 23g total carbohydrate (23g sugars), and 16g protein.

General Statements: All Other Content

Calories: 2000 2500 Total Fat Less than 65 g 80 g Sat. Fat Less than 20 g 25 g Cholesterol Less than 300 mg 300 mg Sodium Less than 2400 mg 2400 mg Potassium 3500 mg 3500 mg Total Carbohydrate 300 g 375 g Dietary Fiber 25 g 30 g Calories per gram: Fat 9 ~ Carbohydrate 4 ~ Protein 4

Formula re: Contains

CONTAINS: Milk and Soybeans.

General Statements: All Other Content

NOTICE: Use this product as a food supplement only. Do not use for weight reduction.

General Statements: All Other Content

Significant product settling may occur.

Storage

Store in a cool, dry place.

Precautions re: Allergies

CONTAINS: Milk and Soybeans.

Brand IP Statement(s) re: (c), (TM), (SM)

GNC Pro Performance(R) Mass XXX(TM) supplies key amino acids such as arginine and the Branched Chain Amino Acids (BCAA); isoleucine, leucine and valine.

Formula re: Contains

PROVIDES 66 GRAMS OF QUALITY PROTEIN WITH 990 CALORIES

Formula re: Contains

INCLUDES A BLEND OF AMINO ACIDS AND MEDIUM CHAIN TRIGLYCERIDES FOR ENERGY

Formula re: Contains

This special blend of carbohydrates includes 83% complex carbohydrates (maltodextrin and fiber) and only 17% sugar. Each serving of this highly specialized sports formula boasts 66 grams of quality protein, 146 grams of carbohydrates and 990 calories when mixed with 2% milk. It also features a blend of essential fatty acids including some healthy unsaturated fats, medium chain triglycerides (MCTs) which are quickly absorbed for energy, and no trans fats. This combination of protein, carbs and fat help to provide the extra-calories that you need to put on the added pounds that you want.

Supplement Facts Panel

Supplement Facts
Serving Size 198 Gram(s)
Servings Per Container 14
Amount Per Serving% Daily Value*
Calories
990 {Calories}
Total Fat
6 Gram(s)9%
Cholesterol
110 mg49%
Sodium
620 mg36%
Potassium
1350 mg60%
Total Carbohydrates
124 Gram(s)41%
Protein
50 Gram(s)
Vitamin A
0 NP20%
Vitamin C
0 NP6%
Calcium
0 NP100%
Iron
0 NP30%

* Percent Daily Values are based on a 2,000 calorie diet.

† Daily Value not established.

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