Is it bad to have one cup of coffee a day?

I’m 18, and I only have one a day, with no sugar and a dash of skim milk.I don’t think it’s detrimental to my calorie intake, as I do not eat much anyway. I always have it before 2pm (well try to)So it it bad?Oh, I am 18 5′4 112 lbs, First Year Uni Student [...] http://bit.ly/9pAaVI