Eight Weeks to Optimum Health (Proven Program for Taking Full Advantage of Your Body's Natural Healing Power) Andrew Weil M.D. Knopf, March 1997. Hardcover. Used - Good / As New. Item #14247 ISBN: 0679447156 Good. Price: $7.50 Add to Cart Ask a Question See all items in Medical & Health See all items by Andrew Weil M. D.