Optima's Glucosamine Joint Complex Gel with added Aloe Vera, Devil's Claw, MSM, Menthol and Essential Oils aims to help maintain joint mobility and flexibility. The gel contains Glucosamine Sulphate, a naturally occurring substance, found in cartilage and connective tissue. Glucosamine Joint Complex Gel is formulated to maximise the properties of each individual ingredient, allowing them to work in synergy.