Preventing the yo-yo effect is indeed a major concern. I've been through it myself after conventional dieting. Korean Medicine approaches this not just by 'eat less, move more' but by considering constitution and organ function. **1. Identifying Constitution** – People gain weight differently. Tae-eum type has strong digestive absorption but is prone to weight gain, so diet control matters more than exercise. So-eum type has weak Spleen and Stomach, so gentle basal metabolism boosting is better than intense workouts. Without knowing your constitution, crash dieting or over-exercising raises yo-yo risk. **2. No Aggressive Calorie Restriction** – Suddenly cutting food intake makes the body perceive starvation and lower basal metabolic rate—called Spleen deficiency (脾虛) in Korean Medicine. A weakened Spleen cannot properly digest and absorb, instead accumulating phlegm-rheum (痰飲) and dampness (濕). Later, even small meals cause easy weight gain. I emphasize 'slowly, little by little, consistently' to patients. **3. Strengthen Spleen and Stomach with Herbal Medicine** – Healthy Spleen and Stomach ensure food is used as energy rather than stored as fat. Formulas are customized per constitution and condition—e.g., Bojungikgi-tang for severe Spleen deficiency, Ijin-tang for excessive damp-phlegm. Actual prescription requires pulse diagnosis, but feeling digestive comfort greatly helps prevent rebound. **4. Gradual Lifestyle Transition** – Abrupt changes overwhelm the body. For late-night eating, shift 30 minutes earlier each week; start with light walks. Dizziness or heaviness may occur—that's a sign the Spleen is adapting. **5. Stress Management** – Liver qi depression (肝鬱) impairs appetite control, triggering cravings for sweets and carbs. Exercise, meditation, and adequate sleep release Liver qi, which is essential for yo-yo prevention. **6. Long-Term Perspective** – Think in terms of 6–12 months rather than quick loss. Constitution change takes time, but once established, weight is often maintained without rebound. Since all steps should be personalized, I recommend a consultation without hesitation.