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 05E B15828 JAA
Label Analysis
Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.
38 distinct active ingredients are disclosed in Supplement Facts.
Every active ingredient discloses a specific amount per serving.
33 ingredients report a %DV; 7 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 | 600 {Calories} | — |
| Calories from Fat | 60 {Calories} | — |
| Total Fat | 7 g | 11% |
| Saturated Fat | 4 g | 22% |
| Cholesterol | 55 mg | 18% |
| Total Carbohydrates | 79 g | 26% |
| Dietary Fiber | 8 g | 31% |
| Sugar | 6 g | — |
| Protein | 60 g | 121% |
| 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 | 65% |
| Riboflavin | 1 mg | 61% |
| Niacin | 21 mg | 108% |
| Vitamin B6 | 1.2 mg | 64% |
| Folic Acid | 400 mcg | 100% |
| Vitamin B12 | 3 mcg | 51% |
| Biotin | 180 mcg | 60% |
| Pantothenic Acid | 4 mg | 42% |
| Calcium | 1310 mg | 131% |
| Iron | 15 mg | 83% |
| Phosphorus | 1184 mg | 118% |
| Iodine | 67 mcg | 45% |
| Magnesium | 141 mg | 35% |
| Zinc | 8 mg | 56% |
| Selenium(L-Selenomethionine) | 28 mcg | 40% |
| Copper | 0.9 mg | 47% |
| Manganese | 1.8 mg | 90% |
| Chromium | 75 mcg | 63% |
| Molybdenum | 60 mcg | 80% |
| Chloride | 269 mg | 8% |
| Sodium | 390 mg | 16% |
| Potassium | 1760 mg | 50% |
| 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
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 (772 total calories) or 2% milk (844 total calories) instead of water. Increase or decrease the amount of liquid to achieve desired consistency. Drink immediately for best results. As a reminder, discuss the supplements and medications you take with your health care providers.
Warnings & Precautions
Precautions re: Allergies
Contains milk, egg and soy ingredients.
Precautions re: All Other
If you are taking any medications, planning any medical procedure or have any medical condition, consult your doctor before use. Avoid this product if you have kidney disease. Discontinue use and consult your doctor if any adverse reactions occur.
Precautions re: All Other
Not intended for use by persons under the age of 18.
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
WARNING: Not intended for use by pregnant or nursing women.
Precautions re: Children
KEEP OUT OF REACH OF CHILDREN.
Storage
Storage
STORE AT ROOM TEMPERATURE AND AVOID EXCESSIVE HEAT.
Formulation
Formula re: Contains
Essential Amino Acids (approximate values) per serving (167 g): Histidine 1,356 mg Isoleucine 2,735 mg Leucine 5,016 mg Lysine 4,248 mg Methionine 1,316 mg Phenylalanine 2,265 mg Threonine 2,593 mg Tryptophan**** 670 mg Valine 3,136 mg Nonessential Amino Acids (approximate values) per serving (167 g): Alanine 1,934 mg Arginine 1,664 mg Aspartic Acid 4,248 mg Cysteine 628 mg Glutamic Acid 9,220 mg Glycine 949 mg Proline 4,351 mg Serine 2,683 mg Tyrosine 2,340 mg ****L-Tryptophan is naturally occurring, not added.
FDA Statements
FDA Statement of Identity
DIETARY SUPPLEMENT
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.
Other Label Statements
Brand IP Statement(s) re: (c), (TM), (SM)
Lean Lipid Optimizer Blend contains just the right amount of dietary fats per serving. 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. MET-Rx(R) Xtreme Size Up(R) contains both quick digesting MCTs and slower digesting flaxseed and sunflower fats, which allows for increased energy availability over an extended time period.* Best of all, there are no unhealthy trans-fats in our formula. MultiVitamin Optimizer Blend packed with a rich source of 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 assure 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 goals and optimal health.* In order to make serious gains, you need to train hard, get lots of rest, and take in plenty of key nutrients. MET-Rx(R) Xtreme Size Up(R) makes it easy to get the high quality protein, complex carbs and essential nutrients that are important for a serious, intensive training program.
Brand IP Statement(s) re: (c), (TM), (SM)
MET-Rx(R) XTREME SIZE UP(R)
Brand IP Statement(s) re: (c), (TM), (SM)
METAMYOSYN(R) Muscle Mass Optimizer Blend combines the trusted METAMYOSYN(R) protein blend, with extra Whey Protein and Creatine, to provide sustained, highly bioavailable fuel for your body’s protein needs. A combination of fast and slow proteins results in a more prolonged absorption rate allowing extended muscle-amino delivery.* By extending the delivery of all essential amino acids to your muscles, MET-Rx(R) Xtreme Size Up(R) helps to stop you from going into a catabolic state which can otherwise lead to muscle loss.* MET-Rx(R) METAMYOSYN(R) Muscle Mass Optimizer Blend utilizes complete proteins from the finest sources to ensure every amino acid required by your muscles is supplied.* Complex Carb Optimizer Blend contains high fiber and top-quality complex carbs to intensify the time release effects of the METAMYOSYN(R) Muscle Mass Optimizer Blend and keep you pumped with nutrients for a longer period.* This specialized blend contains 64g of complex carbs, providing about 80% of the total carbohydrates in MET-Rx(R) Xtreme Size Up(R) (79g total carbs). MET-Rx(R) Xtreme Size Up(R) is formulated with no fructose, so you won't experience the dreaded crash and burn that comes from consuming sugar-laden formulas. Keep your mind energized with complex carbs so you can keep training and growing!*
Brand IP Statement(s) re: (c), (TM), (SM)
Revolutionary METAMYOSYN(R) Muscle Mass Formula*
Brand IP Statement(s) re: (c), (TM), (SM)
Shaping Every Body.(TM)
General Statements: All Other Content
>> 60g Protein? >> 600 Calories? >> 3g Creatine? >> 3g Glutamine? >> 64g High-Quality Complex Carbs!? >> No Fructose or Aspartame
General Statements: All Other Content
? per 4 scoop per serving
General: Product/Version Code
15828 05E B15828 JAA
General Statements: All Other Content
Contents are sold by weight. Some settling may occur.
General Statements: All Other Content
Naturally and Artificially Flavored
General Statements: All Other Content
SUSTAINED PROTEIN SYNTHESIS OF WHEY AND CASEIN PROTEIN mmol/kg/min 2.5 2 1.5 1 0.5 0 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
The Secret is the Source of Protein!
General Statements: All Other Content
Use in conjunction with an intense daily exercise program and a balanced diet including an adequate caloric intake.
Brand IP Statement(s) re: (c), (TM), (SM)
(C)2011
Brand IP Statement(s) re: (c), (TM), (SM)
>>> REVOLUTIONARY METAMYOSYN(R) MUSCLE MASS FORMULA* <<<
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(R) Xtreme Size Up(R), specially designed for hard gainers who want to gain weight and pack on mass.* MET-Rx(R) Xtreme Size Up(R) features Four Optimizer Blends to help you keep growing when other weight gainers quit!* Our specially selected nutrients are designed to meet your body's needs for both immediate and sustained energy and protein synthesis.*
Manufacturer & Distributor
Other
Other
1-800-55-MET-Rx
Manufacturer
MET-Rx Nutrition, Inc.
Boca Raton, FL, 33487
Where to Buy Locally
Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.
Related News
Riboflavin (Vitamin B2) on the Label
What riboflavin is, how much a typical product provides, and why it can change the color of urine.
VitaSuppTrack Editorial· Jun 24, 2026Magnesium Forms Explained: Oxide, Citrate, and Glycinate
The magnesium form on a label affects how much elemental magnesium you get. Here is how the common forms compare.
VitaSuppTrack Editorial· Jun 24, 2026Vitamin D: What the Label Numbers Mean
How to read vitamin D amounts on a Supplement Facts panel, the IU-to-mcg conversion, and why %DV matters.
VitaSuppTrack Editorial· Jun 24, 2026
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2012-02-23. DSLD Label ID: 6534. 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.
Related Products

01-02 Enhanced Fat Melting Matrix
ATS Labs

1000 mg Vitamin C Acai Berry
Emergen-C

1000 mg Vitamin C Cranberry Pomegranate
Emergen-C

1000 MG Vitamin C Cranberry-Pomegranate
Emergen-C