abstemious

abstemious \ab-STEE-mee-uhs\, adjective:

1. Sparing in eating and drinking; temperate; abstinent.
2. Sparingly used or consumed; used with temperance or moderation.
3. Marked by or spent in abstinence.

They were healthy and abstemious; their chief pleasure was reading and Oliver was a life member of the London Library.
-- Sylvia Townsend Warner, The Music at Long Verney

For a man who trafficked in excess, he was surprisingly abstemious.
-- Ralph Blumenthal, Stork Club

When the 1796 outbreak of yellow fever turned into an epidemic, the frightened citizens followed each preventive vogue: herb tea, cold baths, cream of tartar, vinegar, camphor and abstemious diets.
-- Christina Vella, Intimate Enemies

Abstemious comes from Latin abstemius, from ab-, abs-, "away from" + the root of temetum, "intoxicating drink."