This post will be an intro­duc­tion to the con­di­tion and pro­vide an out­line of tac­tics to both nar­row down and deter­mine a course of treat­ment for brain fog. Var­i­ous diag­nos­tic test­ing options are pre­sented and the pos­si­ble out­comes are dis­cussed. Treat­ment plans fit the symp­toms in a holis­tic fash­ion, and one course of nutri­tional sup­ple­men­ta­tion may not be indi­cated for what is not a phys­i­o­log­i­cal issue but a behav­ioral one.