How strong is Black Insomnia? The dangerous brew, made from robusta beans, is almost three times stronger than Starbucks’ dark roast and more than six times stronger than McDonald’s coffee. The International Food Information Council recommends a maximum 300mg of caffeine daily, while the FDA’s limit is 400mg. One 12-ounce cup of Black Insomnia has 702mg. And that’s enough to be harmful to many people… More at Digital Trends.
I would give this a try. Fairly sure my tolerance to coffee is up there with the best of them.