characterized by restraint
abstemious - moderate
The term ‘abstemious’ expresses the forgoing or at least moderation of a desire or appetite, often for health, religious, or moral reasons. This typically involves avoiding eating or drinking too much. It is similar to the word ‘abstain’, though it comes from a different root.
He is a bit of a control freak, which is demonstrated by his abstemious diet.
I enjoy the finer things and indulging myself, so I have an unabstemious lifestyle.
Her current abstemiousness is the result of her previous addiction to drugs and alcohol.