The fundamental difference between the two methods lies in 'which fuel the body uses.' While a general diet reduces the total amount of fuel, the ketogenic diet shifts the fuel source from glucose to ketone bodies. | Category | General Diet (Low Calorie) | Ketogenic Diet (LCHF) | | :--- | :--- | :--- | | Energy Source | Glucose (Carbohydrates) | Ketone Bodies (Fats) | | Core Principle | Limit total intake | Limit carbs, increase fats | | Initial Adaptation | Relatively easy | Potential for 'Keto Flu' (headache, fatigue) | | Sustainability | Wide range of food options | Difficult to maintain in social settings | | Primary Goal | Weight loss and maintenance | Metabolic flexibility and blood sugar control | From the perspective of Traditional Korean Medicine (TKM), every individual has a different constitution. In particular, those with a 'Spleen Deficiency' (脾虛, Bi-heo)—a state of weakened digestive function—may suffer from indigestion or nausea when suddenly switching to a high-fat diet. Furthermore, the efficiency of fat metabolism varies greatly depending on the presence of 'Phlegm-Fluid' (痰飮, Dam-eum), which refers to accumulated metabolic waste, or 'Blood Stasis' (瘀血, Eo-hyeol), where blood circulation is stagnant. Rather than blindly following a trend, it is more effective to first assess your current metabolic state. I recommend determining your direction after evaluating your digestive strength and basal metabolic capacity.