"Two hundred milligrams of cocoa flavanols per day is associated with cardiovascular benefits," said Tod Cooperman, MD, president of ConsumerLab.com. "Depending on the bar you buy, you can get this amount from eating as little as 13.5 grams of dark chocolate, or as much as 59 grams—potentially quadrupling your intake of calories. The new test results show which dark chocolates are richest in flavanols, so you can get flavanols with the fewest calories and at the best price." ConsumerLab.com tested products from Baker's, Endangered Species, Ghirardelli, Green & Black's, Hershey's, Lindt, and Trader Joe's.
Fortunately, none of the dark chocolates exceeded contamination limits for heavy metals. In contrast, most cocoa powders have been found by ConsumerLab.com to be contaminated with cadmium, a kidney toxin, or lead.
Test results and comparisons for the seven dark chocolate bars, nine cocoa powders or nibs, and five cocoa-based pills or liquids are found online in ConsumerLab.com's Cocoa Powders, Dark Chocolates, Extracts, Nibs, & Supplements Review.