Yucca Root has the ability to break up inorganic mineral deposits such as are associated with arthritis, gout, rheumatism, kidney and gall stones. It is anti-inflammatory making it doubly effective with these ailments. Many people find that chronic back pain can be relieved using yucca and many people with arthritis report immediate pain relief with this herb. You will see there is both root and stalk in the yucca supplements. I think the stalk is slightly stronger but both are effective. There are even formulas for dogs with arthritis.