I gag trying to drink coffee. I have no interest in gas-station energy drinks or shots. Chocolate has too much sugar.

I need a caffeine replacement source.

You reach for that refreshing can of soda, feel the satisfying fizz, and enjoy the sweet rush. It seems harmless enough—just a simple pleasure to get through the afternoon slump. But what if that ...

I am 57 years old and love Pepsi, Coke and unsweetened iced tea for the caffeine, which greatly improves my mood and gives me more energy. Unfortunately, ...