The LD50 is around 190mg/kg. Assuming that the average person is about 70kg, 13,300mg is an average dose that would kill half of the people that consume it.

So no, caffeine is not particularly dangerous. If you manage to get hold of pure anhydrous caffeine–I’ve got a few kg stashed away–*that can be dangerous, mostly because it can be confused with things like creatine monohydrate unless you’re very, very careful about labeling your supplements.

I’ve done as much as 600-800 in a day by drinking several large espresso drinks. It’s not very pleasant.

I mean it’s a stretch, but maybe it’s fake