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NOW Foods vs Nutricost Glucosamine Sulfate (2026)
Disclosure: We earn commissions on purchases made through our links. This never influences our scores. Editorial policy
The Verdict
NOW Foods scores higher on our rubric (90 vs 84 on our 0-100 execution score), helped by its UL Certified and NPA A-rated GMP testing. On cost the two are nearly identical - NOW Foods at about $0.14 per dose, Nutricost at about $0.16. Both use the correct glucosamine sulfate form at the studied 1500mg dose. In our view NOW Foods is the slight pick for its stronger testing credentials at the same price; Nutricost carries the Best Value badge in our glucosamine scoring and is a solid alternative. Both got the form right.
Glucosamine Sulfate 750mg, 120 Veg Capsules
NOW Supplements
Glucosamine Sulfate Supplement 750mg, 240 Capsules
Nutricost
Head-to-Head Comparison
| Category | Glucosamine Sulfate 750mg, 120 Veg Capsules NOW Supplements | Glucosamine Sulfate Supplement 750mg, 240 Capsules Nutricost |
|---|---|---|
| Brand Score | 90/100Winner | 84/100 |
| Dosing & Form | 25/25Winner | 25/25 |
| Purity | 19/25Winner | 13/25 |
| Value | 23/25Winner | 23/25 |
| Transparency | 23/25Winner | 23/25 |
| Cost/Day | $0.14Winner | $0.16 |
| Dose/Serving | 1500mg | 1500mg |
| Form | Glucosamine Potassium Sulfate Complex | Glucosamine Sulfate |
| Third-Party Tested | ✓ Yes | No |
| Proprietary Blend | No | No |
Why This Comparison Matters
NOW Foods and Nutricost both make glucosamine sulfate - the specific form used in the joint-health trials, as opposed to the cheaper glucosamine hydrochloride found in many combo products. Getting the sulfate form at the studied 1500mg dose is the thing that matters most in this category, and both products deliver it. This is a value matchup between two brands that got the form right.
Both hit the 1500mg sulfate dose. The differences are testing documentation and cost per day.
We scored both on evidence, quality, cost per dose, and transparency.
Detailed Score Breakdown
Glucosamine Sulfate 750mg, 120 Veg Capsules
NOW Supplements
Full 1,500mg clinical dose per serving using the preferred glucosamine potassium sulfate complex
UL Dietary Supplement Certified, NPA A-rated GMP - strong third-party verification
$0.14/day after a sharp price drop - now excellent value for a third-party verified product at the full clinical dose
Exact clinical dose, form, and third-party certification all clearly disclosed
The best combination of correct form, clinical dosing, third-party verification, and reasonable pricing
Glucosamine Sulfate Supplement 750mg, 240 Capsules
Nutricost
Full 1,500mg clinical dose per serving using the sulfate form supported by 3-year RCTs
Claims third-party testing but no specific laboratory or certification seal verified; GMP certified
$0.16/day - excellent value for a 4-month supply at the full clinical dose
Full disclosure of glucosamine sulfate form and exact dose per serving
Provides a full 4-month supply at the exact clinical dose in a bulk format
How We Compared These Products
Every product in our database is scored on four equally-weighted pillars: dosing accuracy and form quality, purity verification (third-party testing), cost per clinically effective dose (not cost per pill), and label transparency. Each pillar is worth 25 points for a total of 100.
Cost per effective dose is calculated using the clinically studied dose from published research, not the manufacturer's suggested serving. If a product requires multiple servings to reach the dose used in clinical trials, that cost is reflected in the value score.
For a full explanation of our scoring methodology, see our methodology page. Prices were last checked on the dates listed for each product and may have changed.
Frequently Asked Questions
Is NOW Foods or Nutricost glucosamine better?
NOW Foods scores slightly higher on our rubric (90 vs 84 on our 0-100 execution score) thanks to UL Certified and NPA A-rated GMP testing, and both cost about the same (roughly $0.14-$0.16 per dose). Critically, both use glucosamine sulfate - the form studied in joint-health trials - at the 1500mg dose, so either is a correct choice. NOW Foods for stronger testing, Nutricost for its Best Value pricing.
Does glucosamine sulfate work better than glucosamine hydrochloride?
The clinical evidence is stronger for glucosamine sulfate. Most of the positive joint-health trials used the sulfate form at 1500mg daily; glucosamine hydrochloride (common in cheaper combo products) has weaker and more mixed trial support. If you are trying glucosamine, matching the studied sulfate form and dose gives you the best chance of seeing the effect the research describes. Both NOW Foods and Nutricost use the sulfate form.
More Glucosamine Sulfate Comparisons
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FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.