Does eating peaches at night cause weight gain?
Generally, eating a moderate amount of peaches in the evening will not cause weight gain, but overeating peaches may lead to weight gain. Details are as follows:

Peaches are low-calorie fruits that are rich in vitamins, minerals, and dietary fiber. If consumed in moderation in the evening and your overall caloric intake does not exceed your body's expenditure, peaches typically will not cause weight gain. The dietary fiber in peaches also helps promote intestinal motility and aids digestion. Additionally, the dietary fiber in peaches can help you feel fuller, thus avoiding excessive intake of other high-calorie foods.
Although peaches are not high in calories, consuming excessive amounts of peaches at one time in the evening can accumulate significant calories, which are more likely to be converted into stored fat, especially during nighttime when calorie expenditure is lower.
In daily life, to avoid gaining weight, it is important to maintain a healthy lifestyle, including a balanced diet and regular physical activity. If you have health concerns, it is advisable to consult a professional nutritionist or doctor promptly.