Diet herbs alone can produce 3–5kg loss without major dietary changes: ① reduced appetite naturally cuts calories 20–30%, ② increased metabolism burns more fat, ③ but for 5kg+ loss, dietary improvement essential. Recommended changes: ① reduce sugar/refined carbs 50%, ② add protein and vegetables, ③ moderate portion control (no extreme restriction), ④ avoid late-night eating. Doctor provides personalized food guidance during treatment. Major dietary overhaul not required, but mindful eating improves results.