Is There a Connection Between Supplements and Cognitive Degeneration?

There's lots of evidence to show that people on plant base diets are particularly b 12 a they'ree deficient in b 12. And it's something that gives me pause about those diets, because there's certainly a certain, you know, think thereare, there tere are some interesting studies looking at the diet of our ancestors. But i'm not from northern european ancestry and probably never ate fish,. My ancestors were eating lots of fish; I don't like amega three so much.