Nope, and please don't think we're so superficial as to think it would effect our decisions. The students who we teach will someday be touching our children, so we take admissions VERY seriously.
Not trolling, serious questions. Would being incredibly good looking play a role on your acceptance in an interview, or on the other end being incredibly unattractive hurt your chances in any way?
Maybe in US presidential elections height will be a factor, but not in Admissions. My school has admitted some really petite people, and you'd wonder "how are they going to do OMM on, say, a 350 lb patient?"...but they do fine. One of my favorite students in our Class of 2016 is a guy about, oh, 5'4" tall.
I'm a short guy (5'5") and I was thinking about whether my height may be a disadvantage given that taller men tend to garner more success socially, professionally, and with the ladies lol. But then I remembered that I've made it pretty far in life with my height (I'm even married to a beautiful/smart woman who's a bit taller). Also, I can't do anything about my height (in fact I'm gonna be even shorter when I'm old lol).
Please do not engage in the sin of solipsism. I've had plenty of obese and overweight students. I would suspect that pre-meds, by their nature of simply studying health and disease, and being younger and more active, perhaps, may self-select for better physical fitness, because even though 1/3 Americans is overweight, my students don't have the same numbers..
During all my interviews, I never saw a obese medical student. That is probably due to the fact that highly driven health conscious people apply to med school, so they are more likely to work out, eat right, etc. But I never saw an obese medical student. Something to think about.