PC NetwoRx Pure Glucosamine Sulfate Powder (3 Pound)

What the brand says

3 Pounds 99.2% D-Glucosamine Sulfate 2KCL Powder - 1/2 teaspoon provides Potassium (as Potassium Chloride) 235 mg and Glucosamine Sulfate (from 2,000 mg Glucosamine Potassium Sulfate Complex) 1.5 g (1500 mg). Note that people who are allergic to shellfish should not take this product.