This Is Why You’re Fat: 10 Really Surprising Reasons. Well, most of them aren’t surprising because I had already heard them before. Fewer than half apply to me and I’m not saying which ones they are, except to say that there’s only one that I could do anything about – caffeine. I’ve never drank coffee but in the last two or three years I have been trying to cut down on the amount of black tea and caffeinated sodas that I drink. I’m not sure if that has actually made any difference or that it could make a difference if I increased my caffeine intake, which I don’t think I want to do.