Here, for instance, is an NPR article explaining «a study that found
cocoa flavanols can help boost mood and sustain clear thinking among adults who are engaged in intense mental efforts —
like students cramming, or journalists on deadline.»
Earlier studies have demonstrated that
cocoa flavanol intake improves the elasticity of blood vessels and lowers blood pressure — but, for the most part, these investigations have focused on high - risk individuals
like smokers and people that have already been diagnosed with conditions
like hypertension and coronary heart disease.