Honestly, if that was part of any publicity for some wonder drug I'd dismiss it as snake oil. You need to see the studies that the article refers to, rather than just "research".
Dr Perlmutter?
https://www.thecut.com/2015/06/problem-with-the-grain-brain-doctor.html
(Of course, that's just one article, you can google to get almost any result you like.)
Then Jon Ramsey has done a PhD study in which mice live longer on a HFLC diet. OK, interesting, suggests that studies on humans might be worthwhile.
Spanish researchers? Hmm, no way to identify them.
And here's my favourite piece on why the public should be careful about claims of miraculous health benefits attributed to special diets reported in the media
https://io9.gizmodo.com/i-fooled-millions-into-thinking-chocolate-helps-weight-1707251800?IR=T
As an exercise, a journalist performed a study which got the world media to proclaim the weight loss benefits of chocolate. No direct lies, a real study, just so small that the multiple effects they studied were virtually guaranteed to have at least one that would show improvement.
It's a fascinating read, that demonstrates the complete inability of modern journalism to fact check....