You can eat onions in moderation during weight loss, which is a low-calorie food. Onion is a relatively common vegetable, belonging to the low-calorie food, every 100 grams of onion contains about 39 kilocalories, of which 0.4 grams of fat, 9.3 grams of carbohydrates. So you can eat onions in moderation during weight loss, which can supplement a variety of nutrients, provide energy for the body’s metabolism, and generally does not lead to fat accumulation. Diet during weight loss should be balanced, try to avoid high-fat, high-calorie food intake. Eat small and frequent meals, and to increase the amount of exercise, to achieve scientific weight loss. Avoid excessive dietary restrictions for short-term weight loss, resulting in malnutrition, which is detrimental to human health.