If I’m not mistaken I believe the first instance of “Bulletproof Coffee” was a fermented black tea mixed with yak butter.

Additionally I’ve heard of African tribe chewing on coffee beans for energy, but covering it in pork fat when they consume it.

So this may be one of those things where caffeine stand alone isn’t preferable, but when properly prepared you can mitigate most -if not all- of the negative impacts.

#coffeechain