The world's strongest coffee is now available in the United States.
Black Insomnia is not for the faint of heart -- the coffee has 58.8 milligrams of caffeine per ounce. That's almost three times the amount in Starbuck's dark roast coffee.
A 12-ounce cup of Black Insomnia would have more than 700 milligrams of caffeine. The FDA recommends a limit of 400 milligrams per day.
According to Caffeine Informer, a website that helps people understand caffeine, Black Insomnia is listed as one of the "Most Dangerous Caffeinated Products."