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GNC

Pro Performance 100% Whey Protein (Unflavored)

Powder · 1 Scoop (30.03g) · 25 servings

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What it does

A protein formula with Whey Protein Concentrate.

Whey Protein

Mixed formsGrade —

Provides dairy protein to help meet protein needs for muscle maintenance and recovery alongside resistance training.

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Ingredients (4)

IngredientDoseTarget/referenceForm

Whey Protein Concentrate

Amount not found

Whey Protein Isolate

Amount not found

Calcium

130 mg

Trace amount — not scored

Nutrition

Calories, macros & sodium.

  • Sodium60 mg

Other ingredients

CarboxymethylcelluloseThickener

Carboxymethylcellulose was the second emulsifier (with polysorbate 80) in Chassaing et al. 2015 (Nature, PMID 25731162), which showed mucus-barrier thinning, a microbiota shift toward pro-inflammatory species, low-grade inflammation, and metabolic syndrome in mice. Chassaing 2022 (Gastroenterology, PMID 34774538) tested CMC directly in a randomized controlled human feeding trial and found reduced microbial diversity and bacterial encroachment into the normally sterile mucus layer in a susceptible subset of participants. EFSA's 2018 re-evaluation could not establish a safe level due to data gaps. For a purely textural excipient, the gut-barrier risk profile is unfavorable when safer thickeners are widely available.

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Soy LecithinEmulsifier

Widely used emulsifier derived from soybeans

Xanthan GumThickener

Natural thickener from fermented carbohydrates

Lab testing

How to take it

With food

On the label

Combine 1 scoop with cold water, milk, or your favorite beverage in a shaker cup and enjoy!

Price check

$39.99

$1.60 / serving

$50$100

Cheaper than 70% of 119 whey protein supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

Not medical advice. Consult your healthcare professional.

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