I want to buy appropriate supplements to support brain health, but am not sure which of the supplements offered here are or are not fully plant-based.

Note my “why,” please:  I follow as much as I can get organized (Current Brain Type: 8) Caldwell Esselstyn’s biases toward nutrition.  It’s been great for my blood pressure, cholesterol, and seems to be great for lowering any emotionally aggressive tendencies I have been able to easily correlate with eating animal proteins.  Though we (my wife is a cardiac nurse – my family has a high incidence of heart disease and cancer has killed everyone in every generation in her family tree that she is aware of) believe that up to 5% animal proteins is about where we humans are on the evolutionary scale and above that enhances the chances of cardiovascular disease and cancers, we eat virtually no animal proteins.