Treatments claimed to improve and maintain optimal health for people as they age. Antiaging therapy involves stimulation and addition of substances thought to help the body repair and regenerate itself as it ages. The elusive goal of antiaging therapy has been to help the body perform as well in old age as it did in youth. Antiaging therapies include the use of vitamins, minerals, hormones, and some drugs of unproven benefit. There is no evidence, however, that external therapies can reverse or retard the aging process.