This stuff is no joke. Black Insomnia is claiming to be the world's strongest coffee and it's now available in the United States. It's worth noting that a cup of Black Insomnia has over 6 times more caffeine than a regular cup of McDonald's coffee. [SEE CHART BELOW]
With a sweet nutty taste, Black Insomnia's strength comes from the type of bean, robusta, and the way they are roasted. To prove their "world's strongest" title, Kristafor had his beans tested chemically against competitors. [Source]
You can also find Black Insomnia on Amazon.
Mary Sweeney researches the effects of caffeine at John Hopkins School of Medicine and warns that consumption could cause cardiac arrhythmia (also known as heart palpitations).