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Adjective: alterative  'ol-tu,rey-tiv [N. Amer], ol-t(u-)ru-tiv or ól-t(u-)ru-tiv [Brit]
  1. Tending to cure or restore to health
    "alterative powers of herbal remedies";
    - curative, healing, remedial, sanative, therapeutic, sanatory

See also: healthful