Please allow 4-6 wks for delivery. Limited to 1 per household. For 18 or older. Valid in USA only, while supplies last. Void where prohibited, taxed or regulated. Schiff is not responsible for samples lost in the mail. Gllucosamine & Chondroitin are both natural nutrients produced by your body. Glucosamine is used to make cartilage & other molecules that provide structure & function for joints. Glucosamine & Chondoitin both promote natural rebuilding cylcle of cartilage & joints. They support cartilage & keep joint movement strong & smooth.