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Why Too Much Coffee Is Bad? Being one of the most popular beverage in the world, coffee has become part of many people’s routine. Millions of people consume coffee everyday to raise wakefulness, alleviate fatigue and improve concentration and focus. Coffee not only contains many nutrients including magnesium, potassium, B vitamins, niacin, and choline, it is also the large source of antioxidants. Studies had shown that coffee may decrease the risk for liver, colon, prostate, ovarian and oral cancers, basal cell carcinoma, stroke and heart disease. It may also prevent Parkinson’s disease, Alzheimer's disease and Type-2 diabetes. Coffee also contains a material called caffeine. While caffeine has been shown by studies that help enhance physical and mental performance, consuming too much of it would actually cause people to feel worse as caffeine is a stimulant of the nervous system. Too much caffeine can cause diarrhea and heartburn. Heavy daily caffeine use, say more than 500 to 600 mg a day, might produce side effects like insomnia, nervousness, restlessness, irritability, stomach upset, fast heartbeat and muscle tremors. Intake of caffeine above certain limit can lead to caffeine toxicity that is potentially fatal. For instance, there was report that a Japanese male in his 20s died from caffeine overdose because he had drunk too many highly concentrated drinks to help him stay awake in his job at a 24-hour petrol stand. The incidence is believed to be caused by the intake of large amount of caffeine within a short time and the cause of death is usually arrhythmia, or an abnormal heart rate. Although people often relate caffeine to coffee, caffeine can be found in other food and beverages and even medication. Some medications and herbal supplements may interact with caffeine, too. For example, certain antibiotics like Ciprofloxacin (Cipro) and norfloxacin (Noroxin) can interfere with the breakdown of caffeine. This may increase the length of time caffeine remains in the body and amplify its unwanted effects.
Generally, doses above 1 gram will trigger unpleasant symptoms like headaches, heart palpitations and increased urination. Nevertheless, most coffee drinkers do not need to worry since a lethal dose of caffeine is between 10 and 15 grams a day that translates to about 100 cups of coffee. It is hard to drink this amount in a day. However, it is easy to over consume caffeine powder that is sold as stimulant, as in the case of an American teenager who died from caffeine toxicity in 2014. According to FDA (Food and Drug Administration) in the United States, a teaspoon of powdered caffeine has the same amount of caffeine in about 28 cups of regular coffee. Level of caffeine in the blood can be affected by the way the coffee is made. For instance, brewed coffee has more caffeine than instant coffee. Volume of coffee cup and drinks that are consumed around the same time can also affect the level of caffeine. Consuming up to 400 mg of caffeine a day appears to be safe for most healthy adults. This roughly equivalent to the amount of caffeine in 4 cups of brewed coffee, 10 cans of cola or up to 5 energy drinks depending on the amount of caffeine contained. But children should not consume caffeine at all and adolescents should limit their intake to at most 100 mg a day. Reducing caffeine intake can be challenging. While an abrupt decrease in caffeine may cause withdrawal symptoms such as headaches, fatigue, irritability and nervousness, these symptoms are usually mild and resolve after a few days. To manage the caffeine intake, people should start paying attention attention to how much caffeine they are getting from foods and beverages. Cutting back caffeine should be done gradually. This will help the body get used to the lower levels of caffeine and lessen potential withdrawal effects. People can also opt for decaffeinated beverages that look and taste the same as their caffeinated counterparts. When making tea, brew it for less time. This cuts down on its caffeine content, or simply choose herbal teas that do not have caffeine.
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