NutraSense uses only the highest quality, USA made Glucosamine HCl (vegetarian, shellfish-free, non-GMO and Kosher GreenGrown brand) and Chondroitin Sulfate for proven effectiveness and unsurpassed quality. Together, these two ingredients help inhibit the degeneration of critical joint components, and facilitate the production of fluid necessary for proper tissue and joint function. The National Institute of Health reports that this supplement combination is the most effective natural supplement and does not produce the negative side effects of non-steroidal drugs. Safe for short-term and long-term use. If taking Glucosamine for the first time, give the product 3-4 weeks to feel the positive benefits.