Seek­ing an edge, these brain hack­ers mix up risky chem­i­cal cock­tails for break­fast (Stat): “…A 31-year-old entre­pre­neur, Gutiér­rez has thrown him­self into the emerg­ing move­ment of body hack­ing — or, more pre­cise­ly, brain hack­ing. He’s a con­nois­seur of “nootrop­ics,” a broad cat­e­go­ry that includes phar­ma­ceu­ti­cal drugs, dietary sup­ple­ments, and do-it-your­self con­coc­tions, all of them meant…