![]() ![]() You can learn more about how we ensure our content is accurate and current by reading our editorial policy. We link primary sources - including studies, scientific references, and statistics - within each article and also list them in the resources section at the bottom of our articles. Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. One study suggested that it might be the dust that comes from the beans before they are roasted that acts as an allergen.Ī further study in 2017 suggested that a type of mold on coffee beans may be the cause of allergies. ![]() However, exactly what makes some people’s bodies treat caffeine as an allergen is not fully understood. Why does an allergic reaction to caffeine happen?Īs one 2014 study suggests, people’s different response to caffeine is thought to relate to genetics. This results in inflammation, which can lead to hives, itching, and swelling. The antibody prompts their cells to release histamine, to try to flush out molecules it has mistaken as harmful. When they consume caffeine, their body produces an antibody called immunoglobin E. The body of a person who is allergic to caffeine treats it as if it were an invader. What causes the symptoms of an allergic reaction to caffeine? In contrast, a person with a caffeine allergy has symptoms that are caused by an allergic reaction. It may also increase levels of adrenaline in the blood, which makes the brain and body more alert.įor people who have a non-allergic caffeine intolerance, the rush of adrenaline from caffeine may cause them to experience symptoms. In the brain, caffeine blocks the effects of chemical messengers that normally make a person sleepy. It can then affect how different organs work. When a person consumes caffeine, it is absorbed into their bloodstream from their gut. The effects that caffeine has on the body of someone who is allergic to it are not the same as for someone who is caffeine intolerant. Share on Pinterest While some people who experience symptoms when drinking caffeine are allergic to it, others will have a non-allergic intolerance.Ĭaffeine affects different people in different ways. Caffeine allergies are rare, and the symptoms of a caffeine allergy are more serious than those of an intolerance. ![]() Intolerance is different from having a caffeine allergy. People who experience these symptoms may have a non-allergic food intolerance to caffeine. ![]() However, some people are sensitive to caffeine and experience the following when they consume it: Most people can safely drink up to 400 milligrams (mg) of caffeine a day, the equivalent of around four cups. Many drink coffee during their working day, as they believe it makes them more productive. However, it may cause a number of symptoms, including an allergic reaction in some people.ĭrinking coffee and other caffeinated drinks is a cultural norm in the United States and many other countries.Ĭaffeine is a natural stimulant that affects the brain and central nervous system, making people feel more alert and focused. Share on Pinterest Caffeine is a stimulant that makes people feel more awake and focused. ![]()
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