A 12 oz. cup of Black Insomnia, depending on how the coffee is brewed, can contain up to 702 mg of caffeine.
For comparison, a serving of Starbucks’ dark roast coffee has approximately 260 mg of caffeine and a can of Red Bull has 111 mg.
And a single cup of Black Insomnia coffee is equivalent to taking more than three Five Hour Energy shots.
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The FDA recommends no more than 400 mg of caffeine per day (approximately four 6-ounce cups of coffee or 10 cans of cola), but just one 6-ounce cup of Black Insomnia coffee would put you close to your daily limit.
The normal 12-ounce cup would throw you way over it.
According to the Mayo Clinic, going over the recommended limit increases your chances of experiencing caffeine-related issues such as nervousness, migraines, insomnia, muscle tremors and one of the most dangerous of the pack: heart palpitations.
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Although Black Insomnia coffee contains much more caffeine than the recommended safe amount, Ted Kallmayer, editor of Caffeine Informer, said the people the company targets have built up their caffeine tolerance over time.
"However, the problem with these products is that they can inadvertently be consumed by people who are not in the targeted category,” he added.
If you do choose to brew yourself a cup of the world’s strongest coffee, be sure to pay attention to how much you’re drinking.
You can even use Caffeine Informer's caffeine calculator to help determine how much you should consume based on your weight.
More about Black Insomnia at CNN.com.