Extra Strength Glucosamine Sulfate by NOW Foods at Supplementstogo.com. Glucosamine is an amino sugar derived from the chitin of shellfish. It is utilized by the body to support healthy joint structures.* DetailsServing Size: 1 tabletServings per container: 50Suggested Use: As a dietary supplement, take one tablet daily, preferably with meals.Free of: yeast, wheat, corn, soy, milk, sodium, sugar, preservatives. Other Ingredients: cellulose, magnesium stearate, stearic acid, silica.Warnings: Persons with a known allergy to shellfish should not use this product. Caution: Please discard the inedible freshness packet enclosed.Disclaimers: *This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.