Chocolate contains three substances , caffeine , theobromine and phenyethylamine that might be related to this myth .
巧克力含有的三种物质：咖啡因，可可碱和phenyethylamine也许和这个神话有关。
Holly , on the other hand , does contain all three chemicals , and the ratio of caffeine to theobromine in the beverage residues matches the ratio in black drink .
Almost all chocolate contains some level of caffeine , and on top of that , it 's loaded with stimulants like theobromine , which is known to make your heart race a little bit .
几乎所有巧克力都含有一定水平的咖啡因，除此之外，它有兴奋剂如可可碱，已知使你的心跳加快。
" Chocolate contains many substances that act as stimulants , such as theobromine , phenethylamine , and caffeine , " dr bryan raudenbush , from wheeling jesuit university in west virginia , said in comments to reuters health .
