Abstract: A human weight reduction method in which 2,4-dinitrophenol and a thyroid hormone preparation are administered to the patient. The dinitrophenol is administered in dosages sufficient to elevate the patient's body temperature, typically 250 mg every other day. The thyroid hormone preparation preferably contains 3,5,3'-triiodothyronine and is administered in dosages sufficient to substantially maintain the patient's serum T3 concentration originally present at treatment onset.