Vagelos is a very difficult program fyi – I think it has something like a 30-40% withdrawal rate within the first rate. And, although a number of graduates do end up going to med school, it’s frowned upon by the directors of the program — the program is designed to equip you for PhD programs. That being said, it would be impressive on your med school application resume.
Here’s the info on graduates of the program by the way: http://www.sas.upenn.edu/biochem/graduates.html