Review Question - QID 109958

A 17-year-old boy presents to his primary care physician with a chief concern of "bad" skin that has not improved despite home remedies. The patient has had lesions on his face that have persisted since he was 13 years of age. He has a diet high in refined carbohydrates and has gained 20 pounds since starting high school. Physical exam is notable for the findings in Figure A. The patient is started on benzoyl peroxide and topical retinoids. He returns 1 month later stating that his symptoms are roughly the same. Which of the following is the most appropriate next step in management?