BioStacks
GNC

Pro Performance 100% Whey Protein (Unflavored)

Powder · 1 Scoop (30.03g) · 25 servings · $1.60/serving

iHerbAmazon

Ingredients (4)

Potassium

100%

Dose

190 mg

Target

99–500 mg

Form

—

Whey Protein Concentrate

Amount not found

Whey Protein Isolate

Amount not found

Calcium

130 mg

Trace amount — not scored

Other Ingredients (4)

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

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and 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. clinical 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.

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