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GNC

Glucosamine 1000 mg

1 Caplet × 2/day · 90 servings · $0.28/serving

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Ingredients (1)

D-Glucosamine Hydrochloride

100%

Dose/day

2000 mg

Target

1000–1500 mg

Form

Premium

Other Ingredients (10)

Polysorbate 80Emulsifier

Chassaing et al. 2015 (Nature, PMID 25731162) tested polysorbate 80 directly and showed it thinned the gut mucus barrier, altered microbiota composition, and induced low-grade inflammation and metabolic syndrome in mice. The strongest human evidence is for a related emulsifier rather than polysorbate 80 itself: Chassaing 2022 (Gastroenterology, PMID 34774538) was a controlled human feeding RCT of carboxymethylcellulose (CMC) that found microbial encroachment into the mucus layer — polysorbate 80 has not been tested in an equivalent human trial. In vitro work (e.g. Roberts 2010) shows polysorbate 80 enhances bacterial translocation across intestinal epithelium, and observational data link overall dietary-emulsifier exposure to IBD risk. EFSA is mid re-evaluation of polysorbates (E432–E436). For a supplement excipient with purely cosmetic function (improving the look/texture of soft gels and liquids), the gut-barrier risk profile is unfavorable when safer alternatives (sunflower lecithin, MCT carriers, gum acacia) are widely available.

Titanium DioxideColorant

Banned in the EU (2022) over concerns that its ultra-fine particles may damage DNA in gut cells. Still allowed in the US. Used only for white coloring — provides no health benefit.

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Polyethylene Glycol (Coating)Coating

A polyether polymer used as a tablet coating and plasticizer

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Carnauba WaxCoating

Hard plant wax from the carnauba palm used to glaze gummies and tablets

Croscarmellose SodiumDisintegrant

Cross-linked cellulose derivative used as a superdisintegrant

Vegetable OilCarrier

Edible oils used as carriers in softgels and as processing aids

How to Take It

Take it anytime

Take with food to avoid stomach upset. Benefits, where they exist, take weeks of daily use to appear.

With food
Split into 2 doses across the day

On the label

As a dietary supplement, take one caplet twice daily.

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$24.99

$10$20$50

Near the median of 66 glucosamine sulfate supplements

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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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