For a single dose, health authorities recommended that you consume no more than mg of caffeine at one time. Calculate your safe limits here. Recommendations for caffeine levels are for 18 years of age or over. See more about caffeine limits for children and teens. There are plenty but they are not included in the caffeine calculator. However, we maintain an extensive list of caffeine in food here. Once you calculated your item, just click it for more detailed caffeine information about the drink in question.
Caffeine can be lethal with a high enough dosage, and you can get very sick from over-consuming caffeine. People have died from over-consuming caffeine especially when other health issues are present. The American Academy of Pediatrics recommends kids 12 to 18 years old stay below mg of caffeine a day, or one cup of coffee. The reason? Some of us are genetically predisposed to be more sensitive to caffeine than others.
Any underlying health problems particularly involving the heart , as well as medications or other drugs, can also stimulate a stronger reaction to caffeine.
But, as Tara Haelle wrote over at Forbes , these reactions are really, really uncommon from beverages alone. According to a review of the medical literature , there were only 45 caffeine-related deaths reported between and Energy drinks typically contain more caffeine than coffee — making them, at least in theory, easier to overdose on. A generously caffeinated energy drink might contain mg of caffeine — so a person would need to quickly drink 10 to reach deadly blood levels of the stimulant.
Even so, medical complications from energy drinks are still rare. They are arguably the most dangerous form of caffeine, and the most likely to lead to serious health problems. According to the FDA , caffeine powder is pure caffeine — and single teaspoon of the stuff is roughly equivalent to the amount in 28 cups of coffee.
Jeffrey Goldberger, a University of Miami cardiologist and expert on the health effects of caffeine, estimated the maximum potential amount of caffeine Cripe ingested from those three drinks was about mg.
Instead, he thinks there was probably another unrecognized health issue at play, or that this may just be one of the rare cases of sudden death at a young age. But it does have the potential to be dangerous at extremely high doses, and there are people who have some sensitivities to it. The bottom line: If you stick to regular coffee, tea, and the odd energy drink — and avoid chugging these beverages in Herculean doses — you should be just fine.
Our mission has never been more vital than it is in this moment: to empower through understanding. According to Healthline, caffeine overdose can lead to dizziness, diarrhea, insomnia, fever, vomiting, trouble breathing, uncontrollable muscle movements, convulsions, and an irregular heartbeat, among other scary symptoms.
And energy drinks, like Red Bull and Monster, include a number of energizing ingredients in addition to caffeine — and, according to Mayo Clinic Health Systems, they can also contain additional caffeine sources that are actually listed simply as an "energy blend" on the label.
That may sound innocent enough, but the "blend" — which typically contains ingredients like taurine, glucuronolactone, guarana, and B vitamins — can also have pretty extreme side effects, including heart attacks, according to a study published in Mayo Clinic Proceedings. But the human body can handle a fair amount of energy drink-induced unpleasantness before it ceases to function. How much — and how many energy drinks a person can consume before they die — depends on the individual.
According to Mayo Clinic, most healthy adults can safely drink up to milligrams mg of caffeine per day, which equates to about four cups of brewed coffee or two "energy shot" drinks.
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