Combining other diet supplements with herbal medicine can cause issues: ① caffeine-containing supplements + Mahwang: excessive cardiac stimulation, ② Garcinia/Green Tea Extract + herbs: liver burden, ③ laxative supplements + herbs: severe diarrhea, ④ appetite suppressants + herbs: appetite over-suppression. Recommend stopping other supplements during herbal therapy. If essential, inform the doctor for adjustment. Korean medicine alone is usually sufficient.