Nearly one in five U.S. adults (46 million people) has arthritis, and an estimated 67 million people will be affected by 2030, according to the Arthritis Foundation, Atlanta, Ga. (phone 800-283-7800, www.arthritis.org). The most common type of arthritis, osteoarthritis, affects 27 million Americans. This degenerative joint disease is characterized by the breakdown of the joint’s cartilage, causing pain, inflammation, and loss of movement in the joint.
One in five consumers age 30–39 is concerned …