abstemious

Short definition from Wiktionary

Adjective

1. 1
   Refraining from freely consuming food or strong drink; sparing in diet; abstinent, temperate.
2. 2
   Sparing in the indulgence of the appetite or passions.
3. 3
   Sparingly used; used with temperance or moderation.
4. 4
   Marked by, or spent in, abstinence.
5. 5
   Promotive of abstemiousness.