KEY RAW MATERIALS; Glucosamine, chondroitin, and MSM are building blocks for joints and cartilage, combined with chondroitin and MSM, Solgar Extra Strength Glucosamine Chondroitin MSM provides these ingredients or compounds in an expert formulation that is shellfish free HEALTHY JOINTS AND CARTILAGE; Joints are made up of many components, including muscles, tendons, ligaments, and cartilage which need to be kept nourished and healthy. Healthy joints and cartilage are what help us to keep moving more easily EXPERT FORMULATION; Glucosamine is naturally present in bones and cartilage and is a building block for joints and cartilage. With chondroitin and MSM, Extra Strength Glucosamine Chondroitin MSM provides these ingredients in an expert formulation NATURAL WELLNESS; We believe that cleaner is better, we craft our vitamins and minerals in small batches to help ensure consistency and purity from bottle to bottle. For over 70 years we've used 100% recyclable amber glass bottles GOLD STANDARD; All Solgar products meet our industry recognized “Gold Standard” for excellence, made using naturally sourced ingredients and innovating since 1971