If you want to eat enough, you can eat less at night, which is most conducive to controlling diet and losing weight. Don't be too full, and don't leave the table hungry, or you won't be able to hold on in the afternoon and evening.
Don't go on an unprincipled diet to lose weight. It is the most basic principle not to destroy the nutritional needs of the body because you are hungry and thin, and your body will be more sensitive to the fat in food after eating normally in the future.