The consumption of mooncakes will not cause weight gain. Although mooncakes are cakes with high sugar and energy content, reasonable consumption and proper exercise will not cause weight gain. Everything should be consumed in moderation, if you overdo it or do not exercise for a long time, it will cause weight gain. The reason why moon cakes are not fattening is because they are usually eaten in autumn and not for long periods of time, so they do not cause weight gain. If you eat mooncakes for a long time or if you are easily fat, mooncakes may cause weight gain for people who are easily fat because they contain a certain amount of energy. It is recommended that people who are prone to obesity eat less or no food, mainly light fruits, and try to have a balanced diet with nutrition.