No there are not. There are studies in mice (like this one), studies in vitro, etc.
> There's limited interest in it though because most of those things simply have no profit potential
This is not true. There is a lot of interest in the Keto diet, it has been well-studied and has uses in treating epilepsy. The reason it's not prescribed more generally is because of those studies, which show it doesn't work. Not everything is a conspiracy.