🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • Limited research evidence available for ingredients
B Label Compliance Grade

Product Label

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Label Data

72 Gram(s) Serving Size
18 Servings
Amino acid/Protein Product Type
0% Evidence Coverage

Supplement Facts — Evidence Check

Calories
250 {Calories}
Total Fat
2 Gram(s) (3% DV)
Cholesterol
20 mg (7% DV)
Sodium
390 mg (16% DV)
Potassium
890 mg (25% DV)
Total Carbohydrates
20 Gram(s) (7% DV)
Protein
38 Gram(s) (76% DV)
Vitamin A
(60% DV)
Calcium
(100% DV)
(60% DV)
(50% DV)
(60% DV)
(60% DV)
(50% DV)
(40% DV)
(45% DV)
(45% DV)
(40% DV)
(45% DV)
(15% DV)
Vitamin C
(100% DV)
Iron
(50% DV)
(150% DV)
(60% DV)
(100% DV)
(100% DV)
(60% DV)
(50% DV)
(45% DV)
(40% DV)
(50% DV)
(80% DV)

Other Ingredients

Metamyosyn Protein Blend Maltodextrin Vitamin and Mineral Blend Natural and Artificial flavors Calcium Lactate non-dairy Creamer Cellulose Gum Xanthan Gum Salt Soy Lecithin Guar Gum Carrageenan Acesulfame Potassium Gelatin Sucralose

Label Claims — Verification

Nutrient
All Other
All Other (99% of products) Structure/Function (85% of products) Nutrient (54% of products) Approved Health (3% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Directions: For adults, add one (1) packet to 16-20 fl. ounces of cold water or milk and mix thoroughly in a shaker or blender. Increase or decrease the amount of liquid to achieve desired consistency. Drink two shakes per day for best results.

For Mass Gaining: add higher calorie foods such as peanut butter, 1-2% milk, and fruit juices. For Dieters: add lower calorie foods such as skim milk or just use water.

With Meals: Drink along with your meal to increase the overall protein quality and content. You can also mix into oatmeal or add to recipes such as pancake and waffle mixes.

*Use in conjunction with an intense daily exercise program and a balanced diet including an adequate caloric intake.

⚠️ Warnings & Precautions

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

Contains, milk, egg, and soy ingredients.

WARNING: If you are pregnant, nursing, taking any medications, planning any medical or surgical procedure or have any medical condition, consult your doctor before use.

Discontinue use and consult your doctor if any adverse reactions occur.

Not intended for use by persons under the age of 18. KEEP OUT OF REACH OF CHILDREN.

TAMPER RESISTANT: DO NOT USE IF PACKET IS TORN OR OPEN.

🧪 Formulation Notes

38g Protein including METAMYOSYN(R) Blend

Gluten FREE

Naturally and Artificially Flavored

- 3g L-Glutamine - Over 6g BCAAs from protein

- Aspartame Free!

Contains, milk, egg, and soy ingredients.

Some sugar naturally occurs in ingredients.

We’ve upgraded the original formula to take out everything you didn't want while keeping in the exclusive METAMYOSYN(R) protein blend. METAMYOSYN(R) combines slow-acting casein with milk protein, which is a natural source of whey and casein.

- Free of hydrogenated oils, which means 0g trans-fats.

- 38 grams of the exclusive METAMYOSYN(R) protein blend to help build lean muscle.*

- 20 grams of carbohydrates to support muscle glycogen needs as well as energy levels at rest and during exercise.* - 25 Essential Vitamins & Minerals, with 100% DV Calcium to support your body’s nutritional needs.

- Aspartame Free

- Gluten Free

MET-Rx(R) Meal Replacement Powder is the foundational supplement for all athletes looking to improve their overall health and physique.

One packet provides an excellent source of important vitamins and minerals with a proper balance of carbohydrates, proteins and fats, plus electrolytes.

METAMYOSYN(R) protein is a superior quality blend, which combines premium casein with milk proteins, plus L-Glutamine and naturally occurring Branched Chain Amino Acids from protein - Isoleucine, Leucine and Valine.

Milk protein naturally contains both whey and casein - to provide slow and fast-digesting properties.

Additional Information

Complete Protein Blend to Help Build Lean Muscle*

- Low Fat

LEARN MORE by scanning QR CODE with your Smart Phone

18 - 2.54 oz. (72 g) PACKETS

19839 04E B19838 FAC Part No. 22-19839

As a reminder, discuss the supplements and medications you take with your health care providers.

**Not a low calorie food.

See nutrition facts panel for sugar and calorie content.

STORE AT ROOM TEMPERATURE AND AVOID EXCESSIVE HEAT.

97% Lactose Free

The result is a highly bioavailable fuel that helps build lean muscle mass and strength.*

- Low fat to support a lean, healthy body.

- No added sugar**

It is a great-tasting way to make sure you are getting the balanced nutrition you need to reach your fitness goals.* Plus, our convenient packets mean you can take them whenever and wherever your athletic lifestyle takes you. Balanced nutrition is important to anyone looking to create a lean, healthy body.

This combination helps keep you on track in and out of the gym.

THE SECRET IS THE SOURCE OF PROTEIN!

Casein is a slow-acting protein, which results in a more prolonged absorption rate to extend the delivery of amino acids to muscles.

Calories: 2,000 2,500 Total Fat Less than 65g 80g Sat Fat Less than 20g 25g Cholesterol Less than 300mg 300mg Sodium Less than 2,400mg 2,400mg Potassium 3,500mg 3,500mg Total Carbohydrate 300g 375g Dietary Fiber 25g 30g Protein 50g 65g Calories per gram: Fat 9 - Carbohydrate 4 - Protein 4

Typical Amino Acid Profile (milligrams per 72 g packet****) Essential Amino Acids Histidine 1,010 mg Isoleucine 1,687 mg Leucine 3,159 mg Lysine 2,704 mg Methionine 951 mg Phenylalanine 1,668 mg Threonine 1,505 mg Tryptophan***** 381 mg Valine 2,141 mg Nonessential Amino Acids Alanine 1,115 mg Arginine 1,250 mg Aspartic Acid 2,455 mg Cysteine 216 mg Glutamic Acid 7,056 mg Glycine 634 mg Proline 3,366 mg Serine 1,868 mg Tyrosine 1,804 mg *****L-Tryptophan is naturally occurring, not added. ****approximate values

Product Details

UPC / SKU 7 86560 19839 4
DSLD Entry Date 2014-10-27
Product Type Amino acid/Protein
Form Powder
Brand MET-Rx
DSLD ID 38364
Data Updated 2026-04-11

Research Evidence

849 Research Sources
56 Avg Quality Score
450 Meta Analysis
152 Rct
137 Systematic Review
73 Clinical Trial
11 Regulatory Source
7 Other
7 Guideline
3 Openfda Safety
2 Cochrane Review
2 Observational
A Phosphate binders for preventing and treating chronic kidney disease-mineral and bone disorder (CKD-MBD)
Meta Analysis The Cochrane database of systematic reviews 2018
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2024
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid and late life
Meta Analysis The Cochrane database of systematic reviews 2018
A Calcium supplementation during pregnancy for preventing hypertensive disorders and related problems
Meta Analysis The Cochrane database of systematic reviews 2025
A Dietary calcium supplementation for preventing colorectal cancer and adenomatous polyps
Systematic Review The Cochrane database of systematic reviews 2008
A Calcium and vitamin D for increasing bone mineral density in premenopausal women
Systematic Review The Cochrane database of systematic reviews 2023
A Dietary sodium, sodium-to-potassium ratio, and risk of stroke: A systematic review and nonlinear dose-response meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2019
A The association between circulating magnesium and clinically relevant outcomes in patients with chronic kidney disease: A systematic review and meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2021
A Calcium channel blockers versus other classes of drugs for hypertension
Systematic Review The Cochrane database of systematic reviews 2021
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