MET-Rx Protein Plus Bar, Peanut Butter Cup, 9 Bars, 3 oz (85 g) Each supplement bottle
MET-Rx

Protein Plus Bar, Peanut Butter Cup, 9 Bars, 3 oz (85 g) Each

What We Researched
32 active ingredients analyzed · 33 inactive ingredients decoded · 2 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
69
Product Score Fair
73
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D 0 mcg 0%
Calcium 270 mg 20%
Iron 8.6 mg 50%
Potassium 330 mg 8%
Vitamin A 550 mcg RAE 60%
Vitamin C 22 mg 25%
Vitamin E 8.6 mg 60%
Thiamin 0.55 mg 45%
Riboflavin 0.63 mg 50%
Nicain 7.4 mg NE 45%
Vitamin B6 0.74 mg 45%
Folate (145 mcg folic acid) 245 mcg DFE 60%
Vitamin B12 2.21 mcg 90%
Biotin 110 mcg 370%
Pantothenic Acid 3.7 mg 70%
Phosphorus 190 mg 15%
Iodine 55 mcg 35%
Magnesium 45 mg 10%
Zinc 6.1 mg 60%
Copper 0.96 mg 110%
Bioavailability Very Good

Absorption Rating

  • Vitamin D Good
  • Calcium Good
  • Iron Fair
  • Potassium Good
  • Vitamin A Good
  • Vitamin C Fair
  • Vitamin E Good
  • Thiamin Good
  • Riboflavin Good
  • Vitamin B6 Fair
  • Folate (145 mcg folic acid) Fair
  • Vitamin B12 Fair
  • Biotin Good
  • Pantothenic Acid Good
  • Phosphorus Good
  • Iodine Good
  • Magnesium Good
  • Zinc Fair
  • Copper Fair
Other Ingredients Very Good

Fillers & Additives

  • Cocoa Crisps (Soy Protein Isolate, Cocoa [Processed with Alkali], Tapioca Starch)
  • Maltitol Syrup
  • Metamyosyn Vpp Protein Blend (Whey Protein Isolate, Casein, Hydrolyzed Whey Protein Isolate, Calcium Caseinate, Egg White, L-Glutamine)
  • Maltitol
  • Fractionated Palm Kernel Oil
  • Partially Defatted Peanut Flour
  • Glycerin
  • Water
  • Milk Protein Isolate
  • Natural Flavors
  • Sorbitol
  • Dutch Cocoa Powder
  • High Oleic Sunflower Oil
  • Cocoa Filling (Fructose, Water, Maltodextrin, Cocoa [Processed with Alkali], Salt, Carrageenan, Natural Flavors, Tocopherol, Ascorbic Acid) Medium
  • Polydextrose
  • Unsweetened Chocolate
  • Enzyme Modified Soy Protein
  • Cocoa (Processed with Alkali)
  • Vitamin and Mineral Blend (Calcium Carbonate, Magnesium Oxide, Ascorbic Acid, Ferric Orthophosphate, Dl-Alpha Tocopheryl Acetate, Niacinamide, Zinc Oxide, Copper Gluconate, D-Calcium Pantothenate, Vitamin a Palmitate, Pyridoxine Hydrochloride, Riboflavin, Thiamin Mononitrate, Folic Acid, Biotin, Potassium Iodide, Cyanocobalamin)
  • Soy Protein Isolate
  • Fructose
  • Sodium Caseinate
  • Salt
  • Maltodextrin
  • Pectin
  • Calcium Lactate
  • Sucralose
  • Sugar
  • Soy Lecithin
  • Tartaric Acid
  • Mixed Tocopherols (Added to Protect Flavor)
  • Soybean Oil
  • Caramel Color
Efficacy Very Poor

Dosage Analysis

  • Vitamin D 0 mcg Under-dosed
  • Calcium 270 mg Under-dosed
  • Iron 8.6 mg Effective
  • Potassium 330 mg Under-dosed
  • Vitamin A 550 mcg RAE Under-dosed
  • Vitamin C 22 mg Under-dosed
  • Vitamin E 8.6 mg Under-dosed
  • Thiamin 0.55 mg Under-dosed
  • Riboflavin 0.63 mg Under-dosed
  • Vitamin B6 0.74 mg Under-dosed
  • Folate (145 mcg folic acid) 245 mcg DFE Under-dosed
  • Vitamin B12 2.21 mcg Under-dosed
  • Biotin 110 mcg Effective
  • Pantothenic Acid 3.7 mg Under-dosed
  • Phosphorus 190 mg Under-dosed
  • Iodine 55 mcg Under-dosed
  • Magnesium 45 mg Under-dosed
  • Zinc 6.1 mg Under-dosed
  • Copper 0.96 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Calories 310
Total Fat 10 g 13%
Saturated Fat 6 g 30%
Trans Fat 0 g
Cholesterol <5 mg 1%
Sodium 360 mg 16%
Total Carbohydrate 32 g 12%
Dietary Fiber 2 g 7%
Total Sugars 2 g
Includes 1 g Added Sugars 2%
Sugar Alcohol 21 g
Protein 30 g 60%
Vitamin D 0 mcg 0%
Calcium 270 mg 20%
Iron 8.6 mg 50%
Potassium 330 mg 8%
Vitamin A 550 mcg RAE 60%
Vitamin C 22 mg 25%
Vitamin E 8.6 mg 60%
Thiamin 0.55 mg 45%
Riboflavin 0.63 mg 50%
Nicain 7.4 mg NE 45%
Vitamin B6 0.74 mg 45%
Folate (145 mcg folic acid) 245 mcg DFE 60%
Vitamin B12 2.21 mcg 90%
Biotin 110 mcg 370%
Pantothenic Acid 3.7 mg 70%
Phosphorus 190 mg 15%
Iodine 55 mcg 35%
Magnesium 45 mg 10%
Zinc 6.1 mg 60%
Copper 0.96 mg 110%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cocoa Crisps (Soy Protein Isolate, Cocoa [Processed with Alkali], Tapioca Starch) Unknown
Maltitol Syrup Generally_safe

It is used as a sweetener in supplements.

Metamyosyn Vpp Protein Blend (Whey Protein Isolate, Casein, Hydrolyzed Whey Protein Isolate, Calcium Caseinate, Egg White, L-Glutamine) Unknown
Maltitol Generally_safe

It is used to add sweetness with fewer calories than sugar.

Fractionated Palm Kernel Oil Unknown
Partially Defatted Peanut Flour Unknown
Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Water Safe

Dissolves and carries water-soluble ingredients.

Milk Protein Isolate Generally_safe

It is used as a filler or to increase protein content.

Natural Flavors Safe

Improves taste of chewable, gummy, or liquid supplements.

Sorbitol Safe

Provides sweetness and helps retain moisture in chewables.

Dutch Cocoa Powder Unknown
High Oleic Sunflower Oil Generally_safe

It is used as a carrier oil or emollient.

Cocoa Filling (Fructose, Water, Maltodextrin, Cocoa [Processed with Alkali], Salt, Carrageenan, Natural Flavors, Tocopherol, Ascorbic Acid) Unknown
Polydextrose Generally_safe

It is used as a filler, to add bulk, and as a prebiotic fiber.

Unsweetened Chocolate Safe

It is used to add chocolate flavor to the supplement.

Enzyme Modified Soy Protein Unknown
Cocoa (Processed with Alkali) Generally_safe

It is added to supplements to provide flavor and color.

Vitamin and Mineral Blend (Calcium Carbonate, Magnesium Oxide, Ascorbic Acid, Ferric Orthophosphate, Dl-Alpha Tocopheryl Acetate, Niacinamide, Zinc Oxide, Copper Gluconate, D-Calcium Pantothenate, Vitamin a Palmitate, Pyridoxine Hydrochloride, Riboflavin, Thiamin Mononitrate, Folic Acid, Biotin, Potassium Iodide, Cyanocobalamin) Unknown
Soy Protein Isolate Generally_safe

It is used as a filler to increase the bulk of a supplement.

Fructose Generally_safe

It is used as a sweetener.

Sodium Caseinate Generally_safe

It is used as an emulsifier or stabilizer.

Salt Safe

It is used as a flavoring agent.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Pectin Safe

Forms the base of gummy supplements as a vegan gelatin alternative.

Calcium Lactate Safe

It is used as a source of calcium.

Sucralose Generally_safe

Adds sweetness to chewables, gummies, and powdered supplements without calories.

Sugar Generally_safe

Adds sweetness to chewable or gummy supplements.

Soy Lecithin Safe

Helps blend oil and water-based ingredients. Common allergen.

Tartaric Acid Safe

Provides sour taste in chewable supplements.

Mixed Tocopherols (Added to Protect Flavor) Unknown
Soybean Oil Safe

Dissolves fat-soluble ingredients. Contains soy allergen.

Caramel Color Generally_safe

It provides a brown color to the product.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$45$44$43$42$41 Mar 12 $43.00
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
MET-Rx

Founded 1991 · Ronkonkoma, New York, United States · 7 products · metrx.com/

Certifications

2 certifications
Consumerlab Verified Source
Labdoor Verified Source

Transparency

1 claim

Violation History

5 incidents
Prop 65 Lead2017-08-11Source
Lawsuit Protein spiking in Body Fortress and Met-Rx protein supplements.2016Source
Lawsuit False advertising of a creatine supplement.2014Source
Recall MET-Rx Protein Plus Chocolate Roasted Peanut with Caramel bars2009-03-05Source
Lawsuit Kidney problems caused by high protein concentration in MET-Rx products.2001Source
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Frequently Asked Questions
Is MET-Rx Protein Plus Bar, Peanut Butter Cup a good supplement?

MET-Rx Protein Plus Bar, Peanut Butter Cup, 9 Bars, 3 oz (85 g) Each received a product quality score of 69/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 32 active ingredients with 9 servings per container. Of the 33 inactive ingredients, 11 are rated safe and 0 are flagged for review. The manufacturer, MET-Rx, holds a brand trust score of 73/100 with 2 verified certifications including Consumerlab, Labdoor.

What are the ingredients in MET-Rx Protein Plus Bar, Peanut Butter Cup?

MET-Rx Protein Plus Bar, Peanut Butter Cup contains 32 active ingredients: Calories (310), Total Fat (10 g), Saturated Fat (6 g), Trans Fat (0 g), Cholesterol (<5 mg), Sodium (360 mg), and 26 more. Notable high-dose ingredients include Biotin at 370% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is MET-Rx Protein Plus Bar, Peanut Butter Cup safe to take?

MET-Rx Protein Plus Bar, Peanut Butter Cup, 9 Bars, 3 oz (85 g) Each has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is MET-Rx a trustworthy supplement brand?

MET-Rx receives a brand trust score of 73/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1991 and headquartered in Ronkonkoma, New York, United States, the company offers 7 products in their lineup. They hold 2 verified certifications including Consumerlab, Labdoor. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: MET-Rx has 5 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.