restorative (adj.)

"capable of restoring health or strength," late 14c., restoratif, from Old French restoratif, restauratif, from restorer (see restore) or from Medieval Latin restaurativus.

mid-15c., "food or medicine which restores health or strength," from restorative (adj.), or from Medieval Latin restaurativum "a restorative," noun use of the neuter of restorativus.