Khaberni - Green tea contains antioxidants that can help reduce inflammation and protect against some chronic health problems.
However, it also contains caffeine, so excessive consumption can lead to side effects, as follows:
1- Digestive System Disturbance
Most people can consume green tea safely without experiencing side effects. However, taking green tea extract supplements may cause stomach upset, nausea, or constipation, according to Very Well Health, green tea
2- High Blood Pressure
Drinking green tea is safe in moderate amounts, but overconsumption can have side effects due to its caffeine content.
And consuming more than 400 milligrams of caffeine daily can lead to high blood pressure, increased heart rate, headaches, anxiety, or sleep disturbances.
3- Sleep Problems
Consuming large amounts of caffeine can affect sleep quality. Therefore, it is advisable to avoid drinking green tea before bedtime.
Also, consuming high amounts of caffeine during the day can increase anxiety and thereby negatively affect sleep.
4- Decreased Iron Absorption
Green tea contains plant compounds known as catechins, which are powerful antioxidants. However, they can hinder the body's ability to absorb iron from food, which may lead to anemia.
People who suffer from iron deficiency should stick to small amounts, or drink it between meals to minimize its impact on iron absorption.
5- Liver Damage
Green tea is generally safe, but in rare cases, it can cause liver damage in people who have a specific genetic mutation.
These cases mostly appear with green tea extract supplements and not with the tea itself. Those with a history of liver disease should consult a doctor before consuming it.
6- Drug Interactions
Green tea - especially when consumed in high doses - can interact with certain medications, as it contains compounds that may reduce the concentration of medicines in the blood, potentially weakening their effectiveness.
The most prominent medications that may be affected include some blood pressure medications, anticoagulants, antidepressants, cholesterol medications, and treatments for osteoporosis.
Groups that should avoid green tea
Green tea is mostly safe, but it is not suitable for some groups, such as:
• Those with anemia
• Liver disease patients
• Pregnant and breastfeeding women (due to caffeine)
• People who are sensitive to caffeine
The appropriate daily amount
Most adults can consume green tea daily without problems, with the need to limit caffeine to 400 milligrams per day.
One cup of green tea contains approximately 22–40 milligrams of caffeine.
Experts also warn against excessive consumption in people who take medications for heart disease, high blood pressure, cholesterol, liver diseases, anxiety, depression, or osteoporosis, due to the possibility of drug interactions.
