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.

Poison Control centers are seeing a spike in calls about children drinking highly caffeinated energy drinks.

What exactly is in those energy drinks you buy? Some may seem to be mostly infused with juice, but they are actually cauldrons of caffeine. The FDA is now intervening because these drinks may be putting people at risk of serious health effects.