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Hey, nice write up, it is very interesting. I am following you, can you follow me @xtophercruzeu thanks

I don't consume caffeine, and my pharmaceuticals consumption is essentially nil. Does that mean I'm good to go?

Not 'necessarily'. Remember, it says that it also increased the QT length in healthy people. But it's not like we know if healthy people who die from long QT had just drank grapefruit juice, but deaths from long QT are pretty rare anyway. So, I don't know if we know enough to know, but it's also hard to declare it unsafe since millions of people drink it every day without any problems. Which is likely why it's still on the market and doesn't have a warning label... yet.

Yikes ! I thought all antioxidants are good.I'll definitely stay away from this fruit.

I'd say all antioxidants ARE good, but that's not the problem with grapefruit and medications.

kerriknox!! Thank you, your Post.

I'm sure glad I don't like grapefruit!

I haven't researched this before, but I find it interesting that the warnings in this post make me wonder about the stuff Tim Ferriss was recommending in The Four Hour Body (specifically grapefruit juice + coffee). I wonder if anyone has had issues following some of the advice in that book.

There shouldn't be any issues unless one is doing grapefruit AND taking pharmaceuticals (which hopefully the majorit of Tim's readers are not). Statins are probably the big one for one section of the Ferris demographic (middle aged men). But A. I'm guessing most people don't eat grapefruit or grapefruit juice (it's not that common) and B. if they do it's not much. Who drinks a glass of grapefruit juice every day? I'm guessing, hardly anyone.

Ironically, probably the majority of the people that do drink a glass of grapefruit juice every day are of the age that they're likely to be on one or more pharmaceuticals.