low-calorie diet
Noun
Meaning
a diet that is low on calories
Source: WordNetHypernyms
Examples
“If this study shows that a low-calorie diet is an effective and practical way to put Type 2 diabetes into remission, now and in the longer-term, it could completely transform the way Type 2 diabetes is treated."
In the study I mentioned earlier, all 471 participants were placed on a low-calorie diet, given a fitness plan to increase their activity, and had group-counseling sessions.