Coffee... is safe

Caffeine is the most thoroughly studied ingredient in food. The effects of caffeine on human health have been well studied. Modern science knows almost all the advantages and disadvantages of caffeine, but little is known about the relationship between coffee and human health. Past studies have shown that coffee is very harmful to human health because it contains caffeine. In almost every published scientific article on coffee, the focus is on caffeine content and the effects of purified caffeine on people or animals. Caffeine is considered to be the main mental stimulant in coffee, but this is not the case. Today, every knowledgeable doctor, scientist, and coffee drinker can be absolutely sure that it is safe to consume the right amount of caffeine (up to 500 milligrams), which is equivalent to 3-4 cups of coffee. A daily intake of 500-600 milligrams has a certain health risk. In 1987, the Food and Drug Administration (FDA) reaffirmed its positive role. Scientific experiments have shown that caffeine in carbonated drinks does not have any side effects on the human body. The National Academy of Sciences, the Scientific Research Council and the General Office of Surgeons reported that there was no correlation between moderate caffeine intake and increased health risk. Frequent coffee drinkers who abruptly stop taking caffeine can cause mild withdrawal symptoms (such as drowsiness or occasional headaches), but do not develop addictive behavior. Caffeine citrate is used medicinally at a dose of 20 mg / kg for the treatment of asphyxia in premature infants. Caffeine is also used to relieve headaches and migraines after spinal cord puncture.

Caffeine, theophylline and theobromine are three closely related alkaloids in plants. Tea trees, which originated in southern China, are now widely cultivated in India and contain caffeine, small amounts of theophylline and theobromine. Chocolate is the seed of the cocoa tree and contains theobromine and some caffeine. Theophylline and theobromine belong to xanthine and have little effect on nervous system. These alkaloids contain purine structures and are widely distributed in nature. Caffeine in human food mainly comes from coffee, followed by tea, cocoa and cola drinks. Caffeine has less nutritional effect, and most medical studies mainly analyze its pharmacological effects and side effects, as well as the response to consuming large amounts of caffeine. As a result, little is known about the potential health benefits of consuming moderate amounts of caffeine every day.

Most scientists and coffee drinkers agree that caffeine is the main component of coffee, but not the only one. The caffeine content of unroasted raw Robusta coffee beans (1.6% Mel 2.5%) is higher than that of Arabica beans (0.9% Rue 1.2%). You may drink more caffeine than you think, because the degree of roasting does not change the final caffeine content. A moderate intake of 400-500 mg of caffeine equivalent to 4 cups of coffee a day will not be harmful to human health. Rapid intake of caffeine can cause a slight increase in arterial blood pressure, a slight increase in blood catecholamine levels, plasma renin activity and free fatty acid levels, and slight changes in urine and digestive and secretory functions. it can change brain bioelectric activity, mood and sleep type. However, long-term coffee drinking had no effect on blood pressure, serum cholesterol concentration, blood sugar level and sleep. Caffeine in coffee has nothing to do with cardiac arrest, nor with genitourinary tract cancer, pancreatic cancer, teratoma, breast fibrocystic disease. There is no evidence that caffeine intake in normal people can lead to arrhythmias, stomach or duodenal ulcers, or that caffeine is harmful to human health. In fact, drinking coffee and tea is an ancient habit, and it is recent years to study and evaluate the effects of coffee on people. Coffee contains more than a thousand chemicals, some of which are more abundant than caffeine, such as chlorogenic acid. Caffeine is the most studied ingredient in coffee, although so far studies have shown that coffee is one of the irritant substances in coffee, but this only reflects part of the truth.

Throughout human history, there are only a few cases of caffeine poisoning. If we consider that a large number of people around the world drink coffee and other drinks (cola, tea, etc.), then cases of coffee poisoning are extremely rare in the world medical literature. This substance is very safe for ordinary consumers, and the dose that causes adult death is about 5-10 grams of caffeine. Equivalent to the content of more than 100 cups of coffee and more than 200 bottles of cola drinks. Such incidents are rare and usually die after intravenous and direct oral administration of caffeine.

However, lower doses can also cause poisoning symptoms, about 1 gram, which is equivalent to drinking 20-50 cups of coffee, and some people who are not used to drinking coffee every day will react immediately. Some people are highly tolerant because they drink coffee every day and become poisoned only after drinking a large amount of coffee. The main symptoms occur in the central nervous system and cardiovascular system. Insomnia, restlessness and increased excitability are the initial manifestations, people feel unable to sleep, restlessness, discomfort and anxiety, followed by tachycardia, tinnitus, dizziness, muscle tension, palpitations and so on. With the increase of the dose, there will be vomiting, spasms, coma and even death. Some people may die of shock or pulmonary edema with atelectasis or cardiac arrest. Children are more resistant to caffeine, and although high intake can lead to toxic symptoms, no deaths have been reported.

In 2007, a teenager in the UK was taken to hospital after drinking too much coffee. Seventeen-year-old J.W felt hot and began to hyperventilate after drinking seven cups of double espressos coffee in a sandwich shop. The student, from Steinley County in Durham, was taken to North Durham University Hospital where doctors confirmed she had too much coffee. After she recovered, she warned others about the danger of drinking too much coffee. His father said he didn't expect her to drink so much coffee. "I have always stressed to my children the importance of drinking coffee in moderation." But J.W is overloaded. Anything excessive can be harmful to human health, including coffee, food, vitamins, money and even love.