Coffee is the world’s most popular beverage, with many of its health benefits coming from its main compound, caffeine. However, coffee is only beneficial when we drink it in moderation.
How much caffeine is too much?
The US Food and Drug Administration says people should avoid consuming more than 400mg of caffeine, the equivalent of 5 cups of espresso or 8 cups of tea per day.
However, those who are sensitive to caffeine should consider drinking less or opting for another healthy coffee instead.
People who experience symptoms such as restlessness, tremors, and nervousness after consuming caffeine are more sensitive to caffeine. In this group of people, their bodies cannot metabolize caffeine as quickly as others. This means that the caffeine will stay in their bodies longer.
Dr. Greg Potter, chief scientific officer at Resilient Nutrition, says some people should avoid caffeine consumption altogether. “For example, during pregnancy, the body will metabolize caffeine more slowly. Or if a nursing woman drinks caffeinated beverages, some of the caffeine will pass into breast milk and pass to the baby. Newborn stools. decaffeinated is particularly slow.”
Some people should not drink caffeinated beverages. Photo: Getty.
Effects of caffeine on the body
1. Enhance alertness
Many people have the habit of starting their day with a cup of coffee to boost alertness. “Caffeine increases alertness by inhibiting the effects of adenosine, a sleep-inducing chemical that builds up in the body after you wake up,” says Dr. Potter.
Adenosine acts as a “gauge” of how long you’ve been awake and increases feelings of sleepiness. A cup of espresso will help you refresh if you are feeling tired, sleepy because “caffeine has a structure similar to adenosine, it blocks the action of adenosine”. Therefore, if you are looking for ways to sleep better, you should avoid consuming caffeine before bed.
2. Stimulates the cardiovascular system
A study by the Baker Institute of Cardiology and Diabetes (Australia) has shown that drinking 2-3 cups of coffee a day can reduce the risk of heart disease, especially heart rate-related diseases, and prolong age. longevity.
Over 10 years, researchers have looked at varying levels of coffee consumption among half a million people, from less than 1 cup to more than 6 cups per day, and the association of these consumptions with disorders. Cardiovascular disorders including heart failure and stroke. From there, the scientists found that people who drank 2-3 cups of coffee a day had a 10% to 15% lower risk of coronary heart disease, heart failure or arrhythmia.
Drinking too much coffee can be bad for your heart. Photo: Getty.
Dr. Potter said: “Caffeine increases heart rate and blood pressure. For people who don’t regularly consume caffeine, these symptoms will become more obvious. However, the symptoms will only be short-lived. “.
Therefore, people who are sensitive to caffeine should be especially aware of this effect of coffee.
3. Impact on the digestive system
Dr. Potter said: “Coffee has the ability to increase gastrointestinal motility. Plus, coffee has a diuretic effect.”
However, what you need to remember is to always drink coffee in moderation and add filtered water to avoid dehydration.
4. Increased feelings of anxiety
After drinking 2 or more cups of coffee, it’s not unusual to feel a bit jittery or anxious. This is because caffeine acts as a central nervous system stimulant.
“Coffee is a familiar stimulant that helps us feel more alert and energetic throughout the day,” says Eve Kalinik, a nutritional therapist. However, caffeine is also a system stimulant. central nervous system. Therefore, drinking too much can increase anxiety symptoms.”
What happens when you drink too much caffeine?
Drinking too much coffee can cause many unpleasant, even dangerous feelings. Illustration.
Dr. Potter explains that because caffeine is a stimulant, drinking too much caffeinated beverages can cause unpleasant sensations such as:
• Worried
• Jitter
• Fast and irregular heartbeat
• Muscle twitching
• Difficulty sleeping
• Headache
• Digestive problems
To cause any real damage, you’d have to drink about 10 cups of coffee, says nutritionist Dr. Federica Amati.
“Caffeine can be toxic to humans. After about 10 cups of coffee, many people will feel irritable and some may even have seizures.”
(Source: Woman And Home)
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