Sulfur is necessary for collagen, the primary constituent of cartilage and connective tissue. According to Mindell, MSM is responsible for flexible bonds between cells, including those in skin. With sufficient MSM, skin becomes softer, smoother, and more flexible. Boswellin extract Unlike MSM, boswellin extract has not yet entered the nutrition radar screen. You don't see it being hyped in health-food stores, and most probably don't know what it is.
Boswellic acids improve blood supply to the joints and maintain the integrity of blood vessels.
At least one study has indicated that they may open up collateral blood circulation to provide adequate blood supply to the joints. Boswellic acids have been known to reduce joint swelling, maintain blood supply to inflamed joints, maintain mobility, and reduce pain and stiffness in joints. They also have no side effects. Boswellic acids appear to have anti-inflammatory effects because they inhibit an enzyme that is responsible for the manufacture of leukotrienes. Leukotrienes increase blood vessel permeability, which in turn results in the swelling and tenderness that characterizes inflammation.