I went to the pro caps website and looked at the label:
“Neither glucosamine sulfate nor chondroitin sulfate are readily water-soluble, so this product is not intended to be added to water, but instead, to smoothies, yogurt, oatmeal, applesauce, etc.”
Comments also said does not mix well with water and most added to a smoothie/protein drink both to get it to mix and also to mask the taste. Several comments also that they felt better after using regularly.