If there is no lunch and dinner in the afternoon, even if we eat a lot at noon, the digestion and absorption of lunch should be completed at night 18, and our bodies should be on an empty stomach for at least 10 hours until breakfast the next day. If unfortunately we don't eat much at noon and digest it in the afternoon 15, then our bodies will be on an empty stomach 14 hours. Such a long period of fasting will make our bodies think that they are in a state of "famine" and thus take the initiative to enter a state of hunger. When you are hungry, the calories you consume will be more easily converted into fat for storage. In other words, breakfast and lunch the next day are more likely to turn into fat, which runs counter to losing weight.
But if you don't eat after noon, your weight will drop slightly, which is caused by a large loss of muscles. Moreover, the massive loss of muscle will reduce our metabolic consumption and hinder us from losing weight.
Not eating after noon is not a scientific way to lose weight, and even has a very negative impact on keeping fit for a long time.