In the evening, if you eat eggs in moderation as dinner, you will not gain weight in general. If you eat eggs at night before going to bed, you may gain weight. Eggs contain lecithin, DHA, phosphatidylcholine, vitamin A, vitamin B, vitamin D, vitamin B12, as well as calcium, iron, phosphorus, magnesium, zinc and other nutrients. Eating them in moderation can provide the body with high-quality protein, which is beneficial for the development of the nervous system and repairing liver tissue damage. Eggs also have a high fat content, so in order to avoid gaining weight, in the evening when eating eggs should pay specific attention to the following points: 1, moderate intake: egg yolk contains cholesterol, fat, per 100g of eggs contain 8.8g of fat, 2.8g of carbohydrates, 13.3g of protein, if you eat too much will also gain weight. So you can not eat too many eggs at night, 1-2 is appropriate; 2, cooking methods: try to eat boiled eggs or boiled eggs, if you eat fried, deep-fried, salt brine, pickled and other methods of cooking eggs at night, will make the heat rise, not easy to digest, which may grow fat. Boiled eggs should be 6-7 minutes after the boiling water is appropriate, too long will form a layer of iron sulfide on the surface of the egg yolk, so that the nutrition of the egg is reduced, and not easily absorbed; 3, intake time: eggs can be used as dinner at night, should be at least 4 hours apart from bedtime. If eaten before bedtime, it is likely that the calories from the eggs will not be completely consumed and will be stored in the body as fat, thus gaining weight.