NEW YORK – CNN reports that the "world's strongest coffee" is now available in the United States, a jolt that delivers way more than the recommended daily caffeine limit.

"If you want to stand out, you need to be the 'est'—the biggest, smartest, strongest, or cheapest," Black Insomnia founder Sean Kristafor told CNN. "So when we wanted to compete in coffee, as a caffeine product, we had to be the strongest, but obviously, we don't exceed the world guidelines."

At 58.5 mg per fl. oz., Black Insomnia is more than twice as strong as Starbuck's dark roast, at around 21.25 mg per fl. oz., depending on how consumers brew the coffee. Kristafor told CNN that this level is well within limits for a shot, but one cup (12 oz.) could add up to 702 mg of caffeine. The FDA recommends 400 mg of caffeine for daily consumption.

Caffeine Informer, a website about caffeine, lists Black Insomnia as one of the "Most Dangerous Caffeinated Products." Ted Kallmyer, editor of Caffeine Informer, told CNN: "While the amounts are still much higher than what we experts recommend as a safe daily amount (400 mg), this group of people has, over time, built up their caffeine tolerance and/or their livers process caffeine really well so it doesn't affect them adversely. However, the problem with these products is that they can inadvertently be consumed by people who are not in the targeted category."

Not to be outdone, Black Insomnia’s competitor, Death Wish, is another leader in the strong caffeine category. Caiden Tuller of the New York-based company told CNN that Death Wish "is much different than the competition, due to the fact that our roast is USDA Certified Organic and Fair Trade Certified as well."

Both coffees are available for sale on Amazon.