🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 18% of ingredients have research evidence
B Label Compliance Grade

Product Label

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Label Data

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

Supplement Facts — Evidence Check

Calories
210 Calorie(s)
Total Fat
1 Gram(s) (1% DV)
Cholesterol
20 mg (7% DV)
Total Carbohydrates
3 Gram(s) (1% DV)
Protein
43 Gram(s) (86% DV)
Calcium
780 mg (60% DV)
400 mg (32% DV)
✅ Within RDA (0.6× RDA of 700 mg) 📚 12 studies (Tier A: 0, B: 3)
RDA 700mg This product: 400mg UL 4000mg
32 mg (8% DV)
📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)
This product: 32mg
Sodium
140 mg (6% DV)
Potassium
180 mg (4% DV)
3 Gram(s)
📊 Market median: 420.0mg (227 products)
Median 420.0mg This product: 3mg

Other Ingredients

Metamyosyn Protein Blend Natural and Artificial flavors Guar Gum Cellulose Gum Xanthan Gum Sucralose Soy Lecithin

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (98% of products) Structure/Function (90% of products) Nutrient (52% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Use MET-Rx Protein Plus any time of the day including: Immediately After Exercise: Makes an excellent post-workout shake by providing fast digesting proteins for immediate muscle support plus slow digesting proteins for extended amino acid delivery and recovery. 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. In Between Meals: Keeps levels of amino acids elevated so your body doesn’t go into a catabolic state that may otherwise lead to muscle loss. Before Bed: The high content of slow-digesting proteins in MET-Rx Protein Plus makes it a perfect before-bed supplement as it provides “time-released” amino acid delivery to your body. Use in conjunction with an intense daily exercise program and a balanced diet including an adequate caloric intake.

Directions: Add one to two (1-2) scoops of powder with 6-16 ounces of cold water or milk and mix thoroughly in a blender. Increase or decrease the amount of liquid to achieve desired consistency. Drink 1-2 servings per day.

⚠️ Warnings & Precautions

Keep out of reach of children.

Tamper Resistant: Do not use if seal under cap is broken or missing.

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

Contains milk and egg ingredients. Made in a facility that also processes peanuts, tree nuts, soybean, wheat, sesame, shellfish and fish.

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

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

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

🧪 Formulation Notes

Each high-protein serving provides better than a 5:1 ratio of protein to carbs to help meet your nutritional goals.

Best of all, MET-Rx Protein Plus contains no added sugar, corn syrup solids, mono-or diglycerides and is free of aspartame and hydrogenated oils — which means 0 grams trans-fats!

The renowned MET-Rx protein formulation consists of METAMYOSYN, which combines premium whey protein isolates and casein proteins, plus L-Glutamine and naturally occurring Branched Chain Amino Acids from protein — Isoleucine, Leucine and Valine.

Whey is a fast-acting protein while casein is slow-acting, which results in a more prolonged absorption rate to extend the delivery of amino acids to muscles. Milk protein is a natural source of whey and casein.

Vanilla Naturally and Artificially Flavored

22g Protein Features Premium Whey Isolate & Casein

Fuels Muscle Recovery & Strength

Low Fat, Gluten Free & Aspartame Free

Manufactured in the USA with select ingredients from around the world.

Additional Information

The food you put into your body can have a big impact on how you look, feel and work out. MET-Rx Protein Plus was invented to give you the competitive advantage — especially when it comes to quality protein!

Not a low calorie food. Some sugar naturally occurs in ingredients. See supplement facts panel for sugar and calorie content.

The Secret is in the Protein Source!

MET-Rx Protein Plus gives you a firm nutritional basis to help build lean muscle in a low-fat, great tasting formula.

Contents are sold by weight. Some settling may occur.

Perfect anytime, anywhere, MET-Rx Protein Plus is your power protein source!

Store at room temperature and avoid excessive heat.

Servings Per Container 1 scoop (28.5g) about 32 2 scoops (57g) about 16

Typical amino acid profile (milligrams per 28.5 g scoop*****) Essential Amino Acids Histidine 688 mg Isoleucine 1,111 mg Leucine 2,000 mg Lysine 1,663 mg Methionine 557 mg Phenylalanine 946 mg Threonine 1,060 mg Tryptophan**** 301 mg Valine 1,304 mg Nonessential Amino Acids Alanine 732 mg Arginine 741 mg Aspartic Acid 1,682 mg Cysteine 214 mg Glutamic Acid 5,724 mg Glycine 369 mg Proline 1,958 mg Serine 1,125 mg Tyrosine 983 mg ****L-Tryptophan is naturally occurring, not added. *****approximate values

Product Details

UPC / SKU 7 86560 00958 4
DSLD Entry Date 2020-12-26
Product Type Amino acid/Protein
Form Powder
Brand MET-Rx
DSLD ID 241121
Data Updated 2026-04-11

Research Evidence

40 Research Sources
54 Avg Quality Score
16 Rct
12 Meta Analysis
7 Clinical Trial
5 Systematic Review
A Glutamine supplementation for critically ill adults
Meta Analysis The Cochrane database of systematic reviews 2014
A Arginine supplementation for prevention of necrotising enterocolitis in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2017
B Glutamine for induction of remission in Crohn's disease
Systematic Review The Cochrane database of systematic reviews 2016
B Human growth hormone and glutamine for patients with short bowel syndrome
Systematic Review The Cochrane database of systematic reviews 2010
B Immunonutrition as an adjuvant therapy for burns
Meta Analysis The Cochrane database of systematic reviews 2014
B Glutamine supplementation to prevent morbidity and mortality in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2008
B Glutamine supplementation to prevent morbidity and mortality in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2016
B Glutamine supplementation to prevent morbidity and mortality in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2016
B Glutamine supplementation for young infants with severe gastrointestinal disease
Meta Analysis The Cochrane database of systematic reviews 2014
B Glutamine supplementation to prevent morbidity and mortality in preterm infants
Meta Analysis The Cochrane database of systematic reviews 2012
View all evidence for Glutamine →

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