Fact checked by Nick Blackmer Caffeine stays in your system for up to 10 hours, with peak levels between 15 minutes and two ...

If you're feeling anxious and having trouble sleeping, you may be taking in too much caffeine, or you may be a slow metabolizer.

Cutting off caffeine earlier in the day may change more than just your sleep quality.

From espresso to energy drinks to supplements, caffeine comes in many forms, Rula notes. And if you're like most people, you probably enjoy a cup of coffee each morning or a late-afternoon soda to ...

The impact of caffeine on blood pressure from coffee (and cola, energy drinks and chocolate) varies. Research reviews report ...

When you’re dragging yourself through the day, coffee can offer a reset. It can jolt your brain into action, sharpening your ...

TAMPA BAY, Fla (BLOOM) – Feeling groggy when you wake up? You might think grabbing a cup of coffee right away is the best way to jump-start your day. But did you know there’s a better way to time your ...

Enjoying decaf coffee could be good for your health—it could help protect against type 2 diabetes, liver disease, and heart ...