Synsepalum Dulcificum (Miracle Berry)
en.wikipedia.org
en.wikipedia.org
Miraculin. If I didn't know better after reading the Wiki article, I'd thought it's some kind of super-material like unobtainium, or a broadly applicable drug like inaprovaline.
[0]: https://mywozi.com/
From the article:
> "You can eat a berry and then bite into a lemon," says Harvey. "It becomes not only sweeter, but it will be the best lemon you've tasted in your life."
If you eat a miracle berry and then snack on a whole bunch of lemon slices, they may not taste sour, but you will regret it in all kinds of ways.
Also... miracle berry + lemon doesn't actually taste particularly good. There are "sweet lemons" and "sweet limes" (low acid varieties), and they're not popular because they're bland.