[SisterK]

I am wondering if an honest study was done, if it is natural fat that keeps the brain lubed.
Like your butter.

Some olive oils are rank imitation. Since I don’t know which are true, I use walnut oil. Lots of walnut oil. It goes good with savory and sweet dishes.

[Songcraft]

I've found this guy "Bobby Parrish" to have some helpful videos on youtube.   You might want to take a look at this one.

"You're Buying Fake Olive Oil...Here's How To Avoid It!" (Bobby Parrish) [8:02]

One of the brands he recommends is "California Olive Ranch - 100% California".   (That company also make one using oils from several other countries, but he says don't get that one, just the 100% California one.)



He also recommends some other brands in that video.