The key components of espresso coffee may protect against the protein clumping in the brain associated with Alzheimer's disease, a new study on laboratory samples shows, giving scientists an exciting new treatment avenue to explore.
I'm not sure what exactly you're aware of that was debunked. I'm down to find out, though.
Here's a link to the study and here's the press release about the study. For what it's worth, it was mentioned in both that they're not sure how or why this worked, that it's preliminary findings, and that there's lots more research to do.