abstemious – sparing in consumption of especially food and drink; “the pleasures of the table, never of much consequence to one naturally abstemious”- John Galsworthy
nonindulgent, strict – characterized by strictness, severity, or restraint
gluttonous – given to excess in consumption of especially food or drink; “over-fed women and their gluttonous husbands”; “a gluttonous debauch”; “a gluttonous appetite for food and praise and pleasure”
2.
abstemious – marked by temperance in indulgence; “abstemious with the use of adverbs”; “a light eater”; “a light smoker”; “ate a light supper”