Agree with other commenters that we shouldn’t put too much weight on anecdotes, but just to provide a counter-anecdote to yours I’ve been ~99% vegan for over 3 years and it seems like my thinking ability and intellectual output has if anything improved during that time.
My best guess is that it varies based on the person and situation, but for the majority of people (including probably me) a decently planned vegan diet has ~no effect on thinking ability.
Agree with other commenters that we shouldn’t put too much weight on anecdotes, but just to provide a counter-anecdote to yours I’ve been ~99% vegan for over 3 years and it seems like my thinking ability and intellectual output has if anything improved during that time.
My best guess is that it varies based on the person and situation, but for the majority of people (including probably me) a decently planned vegan diet has ~no effect on thinking ability.
Could you say more about what “decently planned” means to you? I think this is where a lot of the dragons live.