Dietary Supplement. Joint Support Formula*. Supports a normal, healthy inflammatory response* 2. Reactivates the joint health gene IGF-1 in human chondrocytes* 3. 90% if clinical trial participants taking Reparagen experienced results within 7 days! 1. Supports the activity of the joint health gene IGF-1* One of the leading causes of poor joint health occurs when our gene cartilage repair factor , stops functioning properly. This "joint health" gene is what tells our joints to repair themselves.* Studies show that as we age, normal levels of IGF-1 decline, greatly limiting.