NYT: Eating chocolate has been tied to a reduced risk of heart disease. Now scientists have uncovered one possible reason.

Using data from a large Danish health study, researchers have found an association between chocolate consumption and a lowered risk for atrial fibrillation, the irregular heartbeat that can lead to stroke, heart failure and other serious problems.

https://www.nytimes.com/2017/05/23/well/why-chocolate-may-be-good-for-the-heart.html?