It’s no secret that as we get older, we pay for the sins of our youth. When it comes to diet, exercise, what we eat and drink, we often think we can worry about it later. But sooner than you’d like, later is here. Over the last decade, I’ve worked at watching what I eat and drink. I even try to limit my caffeine. But, like many coffee, tea, and soda lovers, that’s tough to do. We all need a little caffeine kick to get and stay energized each day. But how much is too much? The answer isn’t a simple one…