Valid 03/16/17 8:00 pm PST thru 03/18/17 11:59 pm PST. Promotions can not be combined. Receive free shipping on your entire order of three or six months supply. This offer applies to standard ground shipping within the United States. Not valid on shipments to Alaska, Hawaii, U.S. territories, P.O. Boxes, APO/FPO and international addresses. Adjustments on previous purchases made only on 03/16/17 8:00 pm PST qualify. Valid online only. 1MD reserves the right to modify or cancel this promotion at any time without notice.