Glucosamine Sulfate
Scored by the Formulate Research Team · Last reviewed July 2026
Score Breakdown
Three factors carry this score; three more are checked separately and can only take points away. Hover or tap to see what drove each one.
Ingredients per Serving
Certifications & Testing
Other Ingredients
Hypromellose, Silicon Dioxide
Recommended Use
Suggested Usage: Take 2 capsules 1 to 2 times daily.
Warnings
Caution: Persons with a known allergy to shellfish should not use this product. For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. Keep out of reach of children. Contains shellfish, (crab, shrimp, lobster, crayfish). Not manufactured with wheat, gluten, soy, corn, milk, egg, fish, tree nut or sesame ingredients. Produced in a GMP facility that p
Frequently Asked Questions
What is NOW Foods Glucosamine Sulfate's Formulate score?
NOW Foods Glucosamine Sulfate scores 78 out of 100 (grade B+) on Formulate's ingredient-level rubric: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
Is NOW Foods Glucosamine Sulfate worth it?
NOW Foods Glucosamine Sulfate scores 78/100 (grade B+). That's an above-average result — most of its doses and ingredient forms are well-chosen, with only minor gaps in dosing, transparency, or testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in NOW Foods Glucosamine Sulfate?
Each serving contains Glucosamine Sulfate (1.5 g). Serving size: 2 Veg Capsule(s). 120 servings per container.
How do I take glucosamine sulfate?
Suggested Usage: Take 2 capsules 1 to 2 times daily.
Who makes Glucosamine Sulfate?
Glucosamine Sulfate is made by NOW Foods. See Formulate's full grade and product lineup for NOW Foods on its brand page.
Is NOW Foods Glucosamine Sulfate third-party tested?
NOW Foods lists the following certifications and testing for this product: Gluten-Free, Dairy-Free.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.