what kind of caffine source are we talking about?
I was a heavy soda drinker in high school. Dew mainly. That turned into Cherry Pepsi/Coke as an adult. When I stopped doing hard labor for a living, the calories started adding up. Diet sodas taste like horseshit, not interested in that, so a few years ago I switched to energy drinks. My philosophy being a can of soda is 35mg caffeine, I was drinking 6ish a day, but that's also about 1000 calories. Well, why not just drink one 160mg Monster and call it a day with just 200 calories?
Worked fine for awhile, but there seems to be some research suggesting peptic ulcers and caffeine tend not to mix well, so I just stopped after the ol' "come to Jesus" hospital stay. It's improved my life in every way. Like I said...I'm just annoyed that most of the delicious beverages have caffeine in them.