Coffee is one of the most popular drinks in the world, and its effects on human health are the subject of much debate, writes IZ. While moderate coffee consumption may have certain benefits, excessive consumption can lead to negative consequences. Let's take a closer look at why coffee can be harmful, based on English-language scientific research.
Impact on the cardiovascular system
Excessive coffee consumption can have a negative impact on the cardiovascular system. A study conducted by the University of Galway showed that drinking more than four cups of coffee a day increases the risk of stroke by 37%. This is because high doses of caffeine can increase blood pressure and cause arrhythmia.
Sleep disturbances and increased anxiety
Caffeine is a central nervous system stimulant that can cause sleep disturbances and increased anxiety. According to a study published in “The New England Journal of Medicine”, caffeine consumption can cause insomnia, nervousness, and rapid heartbeat in sensitive individuals.
Effects on the skeletal system
Excessive coffee consumption may negatively impact bone health. A study published in the journal “Clinical Nutrition” found that each additional cup of coffee was associated with a 4% lower risk of hip fracture. However, other studies suggest that high levels of caffeine consumption may lead to bone loss and an increased risk of osteoporosis.
Caffeine Dependence
Regular coffee consumption can lead to caffeine dependence. Abruptly reducing consumption can cause withdrawal symptoms such as headaches, irritability, and fatigue. The American Psychiatric Association recognizes caffeine withdrawal syndrome as a clinical condition that indicates the potential for coffee to be addictive.
Effects on the digestive system
Coffee stimulates the production of stomach acid, which can irritate the stomach lining and worsen gastritis or peptic ulcer disease. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) recommends limiting coffee consumption if you have gastrointestinal diseases.
Coffee consumption recommendations
For most people, it is considered safe to consume up to 400 mg of caffeine per day, which is equivalent to approximately 4-5 cups of coffee. However, individual sensitivity to caffeine can vary, so it is important to monitor your own feelings and body reactions. People with high blood pressure, anxiety disorders or gastrointestinal diseases should be especially careful and, if possible, limit coffee consumption.
Although coffee has a number of beneficial properties, its excessive consumption can lead to negative health consequences. It is important to observe moderation and take into account the individual characteristics of the body when consuming this drink.
If coffee negatively affects the quality of sleep, causing insomnia and disruption of biological rhythms, then melatonin plays an important role in its normalization. This is a natural hormone responsible for regulating sleep and rest. Learn more about its properties, correct dosage, and doctor's recommendations in the article: What is melatonin and how to take it correctly: doctor's advice.