Glucosamine & Chondroitin are naturally occurring structural components that have grown in popularity for their many benefits. Glucosamine is an amino sugar derived from the chitin of shellfish and is used by the body to support healthy joint structures. Chondroitin complements glucosamine and works synergistically to deliver optimal nutritional support. Extra Strength Glucosamine & Chondroitin from NOW is not manufactured with wheat, gluten, soy, corn, milk, egg, fish or tree nut ingredients.