BRAiNWAVES

When to Stop Drinking Caffeine (and How to Find Your Number)

Caffeine doesn't leave your system when the alertness fades. Here's how to work out your own cutoff time, and why the answer is usually earlier than people expect.

How to Read an Energy Drink Label

Most of what a can tells you is on the back, in small type, in an order that isn't accidental. Here's how to read it, including the part where we point out a problem with our own.