A lot of students are doing the MPH route to get to medical school....I think it becomes very tranparent. I am completing an MPH in a school that eight years ago, accepted every MPH student that applied to the medical school. Every One (emphasis on 'one' here. There were 12 of us that applied this year...Not a sinlge one of us got called for an interview...Even though we all did very well in the program (we study together). Or maybe I should say I did well, you never know with the other students...Although they are very sharp...Oh, I digress.
Like I said, do whatever you want...What will set you apart is the passion with which you discuss issues related to your graduate study, the work you do as a TA/RA with professors, and any publications that may be impending. Of course, I am saying this because the MPH does not necessarily show how well you will do in medical school. You have to bear that in mind...You will be taking biostats and epi and health policy and programs evaluation courses...Which dont relate to anatomy or histology or pathophysiology or pharmacology...I could go on.....