The standard ketogenic diet is a dietary regimen that is high in fat, low in carbohydrates, protein and other nutrients in a reasonable ratio. The benefits of a ketogenic diet include reduced carbohydrate intake, which can improve blood sugar control, improve insulin sensitivity, and reduce body weight, while improving heart function. However, the ketogenic diet also has side effects, which may include headaches, constipation, diarrhea, and gastrointestinal dysfunction in mild cases. The ketogenic diet may lead to increased blood lipids, micronutrient and mineral deficiencies, and increase the risk of kidney stones. Moreover, when the body consumes less carbohydrates, it will undergo lipolysis for energy, and lipolysis tends to produce acidic metabolites, even causing metabolic acidosis. Therefore, the ketogenic diet needs to be applied under the guidance of professionals.