Your knees, shoulders, and elbows are all large joints. Your hands and feet contain many tiny joints. Our joints are used for almost every movement we make. Half of adults over age 65 – or more than 20 million Americans, endure recurrent or chronic joint pain, stiffness, and sometimes swelling. Joint pain can be so severe that ordinary daily activities of sufferers, such as eating a bowl of cereal or washing one hair, become difficult or even impossible.

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