Fill up the cup and listen to Krissy Kendall, Ph.D. tell us everything we should know about the world's most popular drug. Are you trying to match your caffeine intake to your physique or training goals? Here's what you need to know!

Highlights:

- What happens in your body when you ingest caffeine, and how soon the effects "peak"

- Caffeine primes your body to use fat as fuel? It's true!

- Why caffeine is the most legit ingredient in your fat-burner

- What half-life means, and what it should mean to you

- Nicotine's strange effect on caffeine's half-life

- How to know if you're sensitive (it's not rocket science)

- The lethal dose and recommended highest dose

- If you're a light responder, is caffeine still damaging your sleep?

- How long to cycle off of caffeine or a fat-burner

- The "upper limit" for performance boosting is… really high!

- Why volume, rather than strength, is where caffeine shines in the gym

- Caffeine and the endurance athlete: A natural match

- But doesn't it dehydrate you? Not really.

- How to tell different caffeine sources apart

- How much caffeine is in your coffee? Good question.

- Why decaf is anything but.

- Does adding milk to coffee affect the caffeine content?

- Does caffeine make you "less drunk?" (No)

- Is caffeine safe during pregnancy?

- What is the ideal spacing of caffeine doses?

- Does caffeine stunt growth?

- Can caffeine keep you from adding muscle?

- Are the health benefits of caffeinated coffee better than decaf?

- Coffee vs tea: The differences in caffeine (and just as importantly, theanine)

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