- Boswellin, the Indian herb also known as frankincense, is the first herbal supportive to have documented clinical evidence that it can be useful for stiffness. Boswellin inhibits pro-swelling mediators in the body, such as leukotrienes, and helps support the increase blood supply to joints, supporting stiffness and pain. It has been tried for centuries in Ayurveda to maintain stiffness. – Cat’s claw has demonstrated pain-supporting properties in stiffness sufferers who saw significant support