What are the common nutritional deficiencies in western countries related to reduced mental performance ? I've heard about omega 3, folid acid, and vitamin D deficiencies, the last two are now reduced due to food suplementation in some countries.
closed as too broad by Christian Hummeluhr, AliceD, Krysta, caseyr547, Chuck Sherrington Mar 21 at 18:38
There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.