While the coffee and soft drink industries do finance some laboratory work on caffeine, there are also ... the 75-cent cup of perked joe, refills free, into a six-dollar extravaganza brewed ...

But labels don't have to reveal how much caffeine the products pack. We will. We measured the amount in 27 top-selling energy drinks and shots (see table below). We bought the drinks online or at ...

According to U.S. FDA regulations, coffee must be 97% caffeine-free to be labeled “decaf ... coffee or tea is better than caffeinated soft drinks or energy drinks, which contain numerous ...

The drinks contain high amounts of caffeine and sugar ... Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from ...