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How Is High Caffeine Linked To Heart Disease? Caffeine can be found in coffee, tea, soft drinks, chocolate and some nuts. According to an article published in the American Heart Association, caffeine is a natural stimulant that mainly stimulates the central nervous system, where it can raise alertness and provide a needed boost when one is tired. It also releases free fatty acids from adipose (fatty) tissue, and affects kidneys, increasing urination, which can lead to dehydration. Effect of caffeine peaks within an hour after consumption, and the body eliminates half of it within about 4 to 6 hours. But how people react to caffeine really depend on gender, age, and health condition. It also depends on their sensitivity and how quickly it is digested. One cup of regular coffee or tea (8 oz) contains about 70 to 140 mg, or an average of 95 mg of caffeine. A clinical review of evidence on the effects of caffeine found that up to 400 mg of caffeine a day (about 4 cups of coffee) would not have health risks for most. Whether high caffeine intake would increase the risk of coronary heart disease is still debatable. Though caffeine-rich beverages including coffee have long been suspected of causing several heart-related symptoms, such as palpitations or rapid or irregular heartbeats, findings of various studies are conflicting. For instance, a Brazilian study published online October 17, 2016 in the journal ‘JAMA Internal Medicine’ reported that coffee does not seem to raise the risk of irregular heartbeats in people with heart failure in the short term. In the study, 51 Participants with heart failure drank 5 decaffeinated coffee that contained 100 mg of caffeine powder at one-hour intervals during a 5-hour period. Nevertheless, snorting pure caffeine powder is another story. The easy availability and popularity of a powdered pure caffeine product raise concerns following cases of death that involve youth people. Pure caffeine powder is popular among the youths because of the promise of boosting athletic performance and improving mood. This kind of caffeine is legal in most Western world and easy to buy in bulk. It can be bought online for US$15 per pound from a number of companies.
Such incidence has attracted attention from the American Food and Drug Administration (FDA) that warns consumers not to use pure powdered caffeine products for any reason since they can be dangerous, even deadly. When consumed in extreme, this can turn into an abnormal and sometimes life-threatening heart arrhythmia that can stop the heart. Caffeine does this by causing the body to release a burst of adrenaline, and also blocks a key enzyme in heart cells that modulates the effect of adrenaline on the heart. With symptoms like tachycardia, a faster heart rate, each heartbeat also comes with increased force. FDA explained that these products may not have sufficient labeling, and consumers may not be aware that small amounts can cause an overdose. The difference between a safe amount and a lethal dose of caffeine in these powdered products is very small. Hence, using pure caffeine powder can easily be overdosed. A teaspoon of pure caffeine contains around about 4 grams of caffeine, which is in the zone where one could expect toxicity. This is equivalent to drinking approximately 50 cups of coffee at once, or 60 cans of the highly caffeinated energy drink Red Bull. The amount of pure powdered caffeine that is equivalent to that in one cup of coffee is only 1/32 of a teaspoon. This makes accurate measurement of safe quantities very difficult with common kitchen measuring tools, such as teaspoons. Ingestion of 6.5 grams in an adult can lead to death, according to health professionals.
People with caffeine overdose have symptoms
including rapid heartbeat, erratic heartbeat, nausea, vomiting, diarrhea, low
blood pressure, mental status changes such as confusion and agitation, cardiac
dysrhythmias, and seizures. Date: November 7, 2019
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