Sentinel Glucosamine Chondrotin Complex Gel Are Health Supplements To Manage Joint Pain. Glucosamine And Chondroitin Are Two Popular Supplements Said To Help Manage Joint Pain. Glucosamine And Chondroitin, Typically Taken Combined In A Single Supplement. It Helps Relieving Arthritis Pain By Acting As Natural Anti-Inflammatories And Slowing Down The Deterioration Of Cartilage.