Many people jump into trending diets only to experience dizziness or lethargy because they haven't considered their unique constitution. From the perspective of Traditional Korean Medicine (TKM), every individual possesses a different innate 'digestive power.' For instance, those with Spleen Deficiency (Bi-heo, 脾虛), characterized by weakened digestive functions, may struggle with a high-fat ketogenic diet. In such cases, the process of breaking down and absorbing fats can overload the system, leading to bloating and diarrhea. Conversely, those who simply reduce portions while maintaining a high-carbohydrate general diet may accumulate 'Phlegm-Fluid' (Dam-eum, 痰飮). This refers to metabolic waste caused by poor fluid metabolism, which makes the body feel heavy and creates a stagnant metabolism—often described as a 'constitution that doesn't lose weight.' When this is further complicated by 'Blood Stasis' (Eo-hyeol, 瘀血)—stagnant or old blood that hinders circulation—dietary changes alone often reach a limit. Ultimately, the most important factor is understanding your body's current internal state. Rather than blindly following a popular trend, the healthiest and most sustainable approach to avoid the yo-yo effect is to assess your digestive function and metabolic status first and then establish a personalized strategy.