Energy drinks aren't usually associated with health and nutrition but remember ... the Rock' Johnson's outstanding physique and intense work ethic, then Zoa is the energy drink for you.

But are energy drinks a healthiest way to get a boost? Here's the truth. Are energy drinks healthy? No. They have zero health benefits. What they do have is large amounts of caffeine and sugar.

Maybe you drink them for a caffeine boost at the start of the day, to get out of that afternoon slump at work ... for an energy boost, you may get to the root of some underlying health problems ...

We measured the amount in 27 top-selling energy drinks and shots (see table below ... but data suggest that most healthy adults can safely consume up to 400 milligrams per day; pregnant women ...

Functional or "healthy" drinks claim to calm you down, boost your energy, or improve brain health. Celebrities from Katy Perry to Bella Hadid have embraced them. But are they actually worth it?

Now however, energy drinks tend to contain around 150mg to 350mg of caffeine per can. For healthy adults the maximum amount of caffeine that should be consumed in a single day is 400mg ...