Energy drinks are everywhere these days. Many of them look like sports hydration drinks and taste like candy. But a new Consumer Reports investigation finds what’s inside those drinks may be more than you’re bargaining for.

Black, hot, over ice: the ways we drink our coffee are endless, and for many of us, it’s an essential part of our morning routine. But there’s a catch, too much caffeine can leave you jittery, wide awake at midnight, or nursing a headache.

As the old saying goes, sometimes too much of a good thing can be bad. But what about when it comes to coffee?