abstemious (
http://definr.com/abstemious)
adj 1: sparing in consumption of especially food and drink; "the
pleasures of the table, never of much consequence to
one naturally abstemious"- John Galsworthy [ant:
gluttonous]
2: marked by temperance in indulgence; "abstemious meals"; "a
light eater"; "a light smoker"; "ate a light supper" [syn:
light(a)]