[lholden]

These days I drink my cup in the morning 5 days a week. I quit drinking caffeine for about a month every year, and when I start drinking it again that first cup always a shocker. It gives me jitters and makes me extremely hyper. It's pretty easy to forget that caffeine is a stimulant when you are drinking it every day.

I would be surprised if the guy wasn't being negatively affected given the amount of caffeine he was drinking, even with resistance. And like most things you put in your body (even water!), moderation is super important. You are going to get a scary story when someone is doing something in excess like that.

With that said, I'm surprised we (at least in the US) don't have labeling saying "Hey, this contains a stimulant! Like with all drugs, maybe have a think before putting it in your body and practice some moderation. The recommended serving limit is X."