Net Contents
6 lb
Serving Size
167 Gram(s)
Servings Per Container
16
Supplement Form
Powder
Bar Code (UPC/SKU)
7 86560 15828 2
Product Version
15828 10H B15828
Label Analysis
Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.
34 distinct active ingredients are disclosed in Supplement Facts.
Every active ingredient discloses a specific amount per serving.
33 ingredients report a %DV; 6 meet or exceed 100% DV.
This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.
Allergen Guide
Contains
- Milk
- Egg
- Soy
Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.
Supplement Facts
Serving Size: 167 Gram(s) · 1 per day
| Ingredient | Amount Per Serving | % Daily Value |
|---|---|---|
| Calories | 580 Calorie(s) | — |
| Calories from Fat | 70 Calorie(s) | — |
| Total Fat | 7 Gram(s) | 11% |
| Saturated Fat | 4.5 Gram(s) | 23% |
| Cholesterol | 60 mg | 20% |
| Dietary Fiber | 8 Gram(s) | 32% |
| Sugar | 7 Gram(s) | — |
| Total Carbohydrates | 79 Gram(s) | 26% |
| Protein | 60 Gram(s) | 120% |
| Vitamin A(Beta-Carotene) | 4500 IU | 90% |
| Vitamin C | 60 mg | 100% |
| Vitamin D | 240 IU | 60% |
| Vitamin E | 45 IU | 150% |
| Vitamin K | 40 mcg | 50% |
| Thiamine | 0.9 mg | 59% |
| Riboflavin | 1 mg | 59% |
| Niacin | 21 mg | 105% |
| Vitamin B6 | 1.2 mg | 62% |
| Folic Acid | 400 mcg | 100% |
| Vitamin B12 | 3 mcg | 50% |
| Biotin | 180 mcg | 60% |
| Pantothenic Acid | 4 mg | 41% |
| Calcium | 1094 mg | 109% |
| Iron | 13 mg | 72% |
| Phosphorus | 867 mg | 87% |
| Iodine | 60 mcg | 40% |
| Magnesium | 96 mg | 24% |
| Zinc | 8 mg | 51% |
| Selenium(L-Selenomethionine) | 28 mcg | 40% |
| Copper | 1 mg | 52% |
| Manganese | 1.5 mg | 75% |
| Chromium | 60 mcg | 51% |
| Molybdenum | 60 mcg | 81% |
| Chloride | 239 mg | 7% |
| Sodium | 420 mg | 18% |
| Potassium | 1630 mg | 47% |
| Creatine Monohydrate | 3000 mg | — |
| L-Glutamine | 3000 mg | — |
Percent Daily Values are based on a 2,000 calorie diet.
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
Use in conjunction with an intense daily exercise program and a balanced diet including an adequate caloric intake.
Suggested/Recommended/Usage/Directions
Directions: For adults, add four (4) scoops (600 calories) (167g) to 16 ounces of cold water and mix thoroughly in a blender or shaker. For increased calories, use 16 ounces of skim milk (746 total calories) or 2% milk (824 total calories) instead of water. Increase or decrease the amount of liquid to achieve desired consistency. Drink immediately for best results.
Suggested/Recommended/Usage/Directions
FOR MAXIMUM RESULTS, TAKE FOUR (4) SCOOPS WITH 16 OZ. WATER IMMEDIATELY FOLLOWING YOUR WORKOUT.
Warnings & Precautions
Precautions re: Pregnant or Nursing or Prescription Medications
WARNING: Not intended for use by pregnant or nursing women. If you are taking any medications, planning any medical or surgical procedure or have any medical condition, consult your doctor before use.
Precautions re: All Other
Avoid this product if you have kidney disease. Discontinue use and consult your doctor if any adverse reactions occur.
Precautions re: Children
Not intended for use by persons under the age of 18. KEEP OUT OF REACH OF CHILDREN.
Precautions re: All Other
TAMPER RESISTANT: DO NOT USE IF SEAL UNDER CAP IS BROKEN OR MISSING.
Precautions re: Pregnant or Nursing or Prescription Medications
As a reminder, discuss the supplements and medications you take with your health care providers.
Precautions re: Allergies
Contains milk, egg and soy ingredients.
Storage
Storage
STORE AT ROOM TEMPERATURE AND AVOID EXCESSIVE HEAT.
Formulation
Formula re: Contains
Energizing Carb Optimizer Blend contains high fiber and glycogen-building carbs that work hand-in-hand with the Muscle Mass Optimizer Blend.* This specialized blend contains over 70g of carbs per serving to keep your muscles fully loaded with this important macronutrient.*
Formulation re: Does NOT Contain
MET-Rx Xtreme Size Up is formulated with no fructose, so you won't experience the dreaded crash and burn that comes from consuming sugar-laden formulas.
Formula re: Contains
Lean Lipid Optimizer Blend contains just the right amount of dietary fats per serving.
Formula re: Contains
ONE OF THE HIGHEST PROTEIN CONTENTS PER SERVING ON THE MARKET
Formula re: Contains
- 60G PROTEIN - 580 CALORIES - 3G CREATINE - 3G GLUTAMINE - 79G ENERGIZING CARBS! per 4 scoop serving
Formula re: Contains
Contains milk, egg and soy ingredients.
Formula re: Contains
MET-Rx XTREME SIZE UP HAS ONE OF THE HIGHEST PROTEIN CONTENTS PER SERVING ON THE MARKET.
Formula re: Contains
PROVIDING 60G OF PROTEIN AND 580 CALORIES PER 4 SCOOP SERVING, XTREME SIZE UP SHOULD BE YOUR ONLY CHOICE FOR SERIOUS MASS GAINING!*
Formula re: Contains
METAMYOSYN Muscle Mass Optimizer Blend combines the trusted METAMYOSYN protein blend, with extra Whey Protein and Creatine, to provide sustained, highly bioavailable fuel for your body’s protein needs.*
FDA Statements
FDA Disclaimer Statement
*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.
FDA Statement of Identity
DIETARY SUPPLEMENT
Other Label Statements
General Statements: All Other Content
Typical Amino Acid Profile (milligrams per 167 g serving*****) Essential Amino Acids Histidine 1,269 mg Isoleucine 2,680 mg Leucine 4,950 mg Lysine 4,194 mg Methionine 1,269 mg Phenylalanine 2,202 mg Threonine 2,531 mg Tryptophan**** 661 mg Valine 3,088 mg Nonessential Amino Acids Alanine 1,887 mg Arginine 1,577 mg Aspartic Acid 4,203 mg Cysteine 625 mg Glutamic Acid 9,065 mg Glycine 924 mg Proline 4,221 mg Serine 2,591 mg Tyrosine 2,238 mg ****L-Tryptophan is naturally occurring, not added. *****approximate values
General Statements: All Other Content
Contents are sold by weight. Some settling may occur.
Brand IP Statement(s) re: (c), (TM), (SM)
YOU CAN’T FAKE STRONG
Brand IP Statement(s) re: (c), (TM), (SM)
2015
General: Product/Version Code
15828 10H B15828
General Statements: All Other Content
Keep your mind energized with carbs so you can keep training and growing!*
General Statements: All Other Content
We know that your goal in your workout is to pack inches onto your biceps rather than your waist, so we didn't compromise quality with loads of unhealthy fats that could slow down your progress. MultiVitamin Optimizer Blend is packed with specially selected vitamins and minerals essential to carbohydrate and protein metabolism.* Optimal intake of key vitamins and minerals is especially important when following a high-calorie diet and exercise program for mass gains, in order to assume proper usage and muscle metabolism of ingested calories.* You can rest assured that our comprehensive blend of the right vitamins and minerals will complement your nutrition plan to support your bodybuilding or fitness goals.* In order to make serious gains, you need to train hard, get lots of rest, and take in plenty of key nutrients.
Brand IP Statement(s) re: (c), (TM), (SM)
MET-Rx Xtreme Size Up makes it easy to get the high quality protein, energizing carbs and essential nutrients that are important to a serious, intensive training program.*
General Statements: All Other Content
SUSTAINED PROTEIN SYNTHESIS OF WHEY AND CASEIN PROTEIN mmol/kg/min ~Whey ~Casein Approximate time points illustrating whey and casein’s differing effects on protein synthesis when taken on an empty stomach.
General Statements: All Other Content
LEAN MASS & STRENGTH*
General Statements: All Other Content
Naturally and Artificially Flavored
General Statements: All Other Content
POST-WORKOUT
Brand IP Statement(s) re: (c), (TM), (SM)
IF YOU ARE ONE OF THOSE PEOPLE WHO HAVE A TOUGH TIME PACKING ON SOLID, POWERFUL MASS, TRY MET-Rx XTREME SIZE UP, SPECIALLY DESIGNED FOR HARD GAINERS WHO WANT TO GAIN WEIGHT AND PACK ON MASS.* MET-Rx XTREME SIZE UP FEATURES FOUR OPTIMIZER BLENDS TO HELP YOU KEEP GROWING!*
General Statements: All Other Content
OUR SPECIALLY SELECTED NUTRIENTS ARE DESIGNED TO MEET YOUR BODY'S NEEDS FOR BOTH IMMEDIATE AND SUSTAINED ENERGY AND PROTEIN SYNTHESIS.* The Secret is the Source of Protein!
General Statements: All Other Content
A combination of fast and slow proteins results in a more prolonged absorption rate allowing extended muscle-amino delivery.*
Brand IP Statement(s) re: (c), (TM), (SM)
By extending the delivery of all essential amino acids to your muscles, MET-Rx Xtreme Size Up helps to stop you from going into a catabolic state which can otherwise lead to muscle loss.* MET-Rx METAMYOSYN Muscle Mass Optimizer Blend utilizes complete proteins from the finest sources to ensure every amino acid required by your muscles is supplied.*
Manufacturer & Distributor
Distributor
MET-Rx Nutrition, Inc.
Boca Raton, FL, 33487
1-800-556-3879
Market Reference
Met-Rx Big 100 Colossal Peanut Butter Pretzel Bars
MET-Rx4.4(405)$12.49MET-Rx Big 100
Walmart4.5(893)$8.97MET-Rx Frosty Chocolate
Instacart4.2(45)$4.79Met-RX Chocolate Chip 3.5oz
7-Eleven$3.99Met-rx Engineered Nutrition Meal Replacement Shake
Instacart4.4(355)$4.29Met-Rx Big 100 Bar
7-Eleven4.7(163)$3.99Met-rx Big100 Colossal Super Cookie Crunch Nutrition Bar
Stop & Shop4.5(893)$32.99Met-Rx Protein Plus Bar Peanut Butter Cup 9 Bars
Target4.2(131)$40.99
Where to Buy Locally
Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.
Showing representative supplement & health retailers — search above for stores in your area.
GNC
4.0 (30)Vitamin & supplements store
778 SR 96 Ste 140, Bonaire, GA 31005
The Vitamin Shoppe
4.6 (166)Vitamin & supplements store
2971 Watson Blvd #100, Warner Robins, GA 31093
NutriCartel
5.0 (142)Vitamin & supplements store
1010 N Houston Rd, Warner Robins, GA 31093
5 Star Nutrition Warner Robins
4.9 (178)Vitamin & supplements store
133 Margie Dr Ste 300, Warner Robins, GA 31093
GNC
4.5 (49)Vitamin & supplements store
2922 Watson Blvd #220, Centerville, GA 31028
expresstime
5.0 (1)Vitamin & supplements store
Russell Dr, Warner Robins, GA 31095
Halal Nutritional Supplements
Vitamin & supplements store
105 Briarcliff Rd, Warner Robins, GA 31088
Gunn Nutrition
4.6 (81)Health food restaurant
6009 Watson Blvd Ste 400, Byron, GA 31008
Research & Studies
Diets designed for Athletes
M Karinch - 2002 - books.google.com
… training and concluded that athletes often need supplements to stay healthy. In the push to be … A typical selection of bars aimed at athletes striving for lean mass might include MET-Rx's …
20024 citationsRecovery from a cycling time trial is enhanced with carbohydrate-protein supplementation vs. isoenergetic carbohydrate supplementation
JM Berardi, EE Noreen, PWR Lemon - Journal of the International …, 2008 - Taylor & Francis
… a medical history interview, none had neuromuscular, metabolic, or musculoskeletal disorders. In addition, none were using dietary supplements … by a grant from Met-Rx USA, Inc. and …
2008108 citationsBar market still booming: no longer niche products for'fitness freaks,'nutrition bars are taking the mainstream by force.
T Wright - Nutraceuticals World, 2005 - go.gale.com
… Nutrition bars have to taste great and offer health benefits, … More recently, the company launched the Health By Chocolate … Met-Rx Big 100 contains 27 grams of Metamyosyn protein …
20051 citationsThe Powerfood Nutrition Plan: The Guy's Guide to Getting Stronger, Leaner, Smarter, Healthier, Better Looking, Better Sex--with Food!
S Kleiner, J O'Connell - 2006 - books.google.com
… you make informed decisions about your health. It is not intended as … a medical problem, we urge you to seek competent medical … The first MRP—MET-Rx, a proprietary blend of protein, …
20067 citationsFunctional Food in the Marketplace: New Products, Availability, and Implications for the Consumer
JK Rippe - Nutritional Health: Strategies for Disease Prevention, 2012 - Springer
… Examples include sports beverage MuscleMilk, sports bar Detour, MRPs such as MET-Rx … in this chapter, Good Cacao Superfood Chocolate starts with 70% cacao and includes …
20121 citationsComparing Acute Effects of Caffeine Delivery Forms on Cross-Training Performance: A Randomized Placebo-Controlled Crossover Trial
S Vargas-Molina, DA Bonilla, M García-Sillero… - Nutrients, 2026 - mdpi.com
20261 citations
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Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2016-08-24. DSLD Label ID: 64032. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.
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