Noun
portion control (uncountable)
A method of moderating one's diet by determining the number of calories in each serving of food, and keeping one's consumption below a predetermined number.
It's all about portion control. Grilled fish, a small amount of wild rice and vegetables is a good meal. Elizabeth Hurley
Dieting by portion control doesn't work because one is constantly fighting addictive drives. Joel Fuhrman
Lose weight – Portion control is equally important. Source: Internet