Sure, how can I lose weight if I don't eat? If you always don't eat according to your normal diet during your weight loss, it won't be good for you to lose weight, but it depends on how you eat at lunch. For example, eating a lot of greasy food for lunch, not eating vegetables, and not supplementing protein and vitamins will definitely make you fat. If you pay attention to the combination of meat and vegetables, a light lunch will definitely help you lose weight.