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Tea and coffee are also caffeine-rich drinks. But which is more beneficial to health has always been controversial. The scientific world puts a point to these discussions and reveals the benefits and harms of both drinks.

According to a 2020 Turkey scientists study, people who consumed moderate amounts of caffeine had a lower risk of Type 2 diabetes than those who never consumed it. They are also less likely to develop certain cardiovascular diseases, neurodegenerative diseases (such as alzheimer’s and parkinson’s), cancers such as colon cancer, uterine cancer and liver cancer.

“Overall, coffee contains two to three times as much caffeine as tea,” said, assistant professor of clinical neurology at the School of Medicine. However, the exact ratio depends on factors such as tea type, quantity, water temperature, brewing time.

For example, black tea contains 48 milligrams of caffeine, while green tea contains only 29 milligrams of caffeine.

Pure herbal teas such as mint tea and chamomile tea do not contain caffeine at all.

Tea contains L-theanine (theanine), a chemical that metabolizes caffeine for longer.


Research shows that coffee contains more caffeine than tea, but tea provides a longer-term boost in energy than coffee.

This is because, unlike coffee, tea contains L-theanine (theanine), a chemical that metabolizes caffeine for longer. A 2019 study found that participants who consumed a combination of theanine and caffeine performed better on the attention test than those who consumed caffeine alone. The study concluded that the combination of the two improved both cognitive performance and attention.

Both green and black tea contain theanine; however, green tea contains slightly more than about 6.56 mg, compared to 5.13 mg of black tea.

Coffee contains more antioxidants than tea, hot chocolate and red wine.


Chow notes that consuming antioxidants in the form of coffee or tea could potentially prevent or cure chronic degenerative diseases such as stroke, cancer, diabetes and heart disease.

A 2018 study also found that coffee contains more antioxidants than tea, hot chocolate and red wine.

The United States Food and Drug Administration also recommends that no more than four to five cups of coffee a day be consumed because it causes too much caffeine. And he says excessive caffeine can cause nausea, diarrhea, insomnia, anxiety, high heart rate.

Chow says there is no clear winner between tea and coffee: “high caffeine in coffee can sound good if you’re looking for a faster effect. If you are more sensitive to caffeine, you may prefer tea because of the theanine level. That means a longer and more permanent energy boost.”


Regular caffeine intake may impair coffee intake’s ability to process information by reducing the volume of gray matter in the brain, according to a new study.

The Swiss researchers gave the volunteers three 150mg of caffeine a day for 10 days. This equates to about 4-5 small cups of filter coffee per day, or six to seven espressos. As a result, they found a reduction in gray matter, mostly found in the outermost layer of the brain or cortex, which serves to process information.

This reduction was particularly striking and noticeable in the right medial temporal lobe, including the hippocampus, a region of the brain needed for memory consolidation. However, the effect seemed temporary, with only 10 days of decaf able to turn things around.

Dr, from the University said: “Our results do not mean that caffeine consumption has a negative effect on the brain. But daily caffeine consumption clearly affects our cognitive enhancement.” said.


The main goal of this study was to measure the effect of coffee drunk in the evening on sleep. They investigated participants ‘ sleep quality using electroencephalography (EEG), a method of recording the electrical activity of the brain by using electrodes placed on the scalp.

For the experiments, a group of 20 healthy teens who regularly drank coffee every day participated in the study. Subjects were given three 150 mg caffeine tablets per day to exceed a ten-day period and were asked not to consume any other caffeine during that time.

Although the researchers observed changes in gray matter in the brain, surprisingly, caffeine consumed as part of the study did not cause insomnia.

Turkey Medicals explained to IHA and AA correspondences that; “In further coffee-related medical research this week, government Antalya City and Research Hospital oncologist experts found that long-term, intense coffee consumption (six or more cups a day) can increase the amount of fat in the blood.”

“While several studies on the health effects of coffee and caffeine have been drawn in different directions, the study researchers warn that this increases the risk of cardiovascular disease.” was said.

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President of Organ Transplant Center at MedicalPark Hospital Antalya

Turkey's world-renowned organ transplant specialist. Dr. Demirbaş has 104 international publications and 102 national publications.

Physician's Resume:

Born on August 7, 1963 in Çorum, Prof. Dr. Alper Demirbaş has been continuing his work as the President of MedicalPark Antalya Hospital Organ Transplantation Center since 2008.

Prof. who performed the first tissue incompatible kidney transplant in Turkey, the first blood type incompatible kidney transplant, the first kidney-pancreas transplant program and the first cadaveric donor and live donor liver transplant in Antalya. Dr. As of August 2016, Alper Demirbaş has performed 4900 kidney transplants, 500 liver transplants and 95 pancreas transplants.

In addition to being the chairman of 6 national congresses, he has also been an invited speaker at 12 international and 65 national scientific congresses. Dr. Alper Demirbaş was married and the father of 1 girl and 1 boy.


Eczacibasi Medical Award of 2002, Akdeniz University Service Award of 2005, Izder Medical Man of the Year Award of 2006, BÖHAK Medical Man of the Year Award of 2007, Sabah Mediterranean Newspaper Scientist of the Year Award of 2007, ANTIKAD Scientist of the Year Award of 2009, Social Ethics Association Award of 2010, Işık University Medical Man of the Year Award of 2015, VTV Antalya's Brand Value Award of 2015.


Doctor of Medicine Degree Hacettepe University Faculty of Medicine Ankara, General Surgeon Ministry of Health Turkey EKFMG (0-477-343-8), University of Miami School of Medicine Member of Multiple Organ Transplant, ASTS Multiorgan Transplant Scholarship. Lecturer at Kyoto University. Lecturer at University of Essen, Research assistant at the University of Cambridge .

Professional Members:

American Society of Transplant Surgeons, American Transplantation Society Nominated, Middle East and Southern Africa Council Transplantation Society 2007, International Liver Transplantation Association, Turkish Transplantation Association, Turkish Society of Surgery, Turkish Hepatobiliary Surgery Association.


Our website contents consist of articles approved by our Web and Medical Editorial Board with the contributions of our physicians. Our contents are prepared only for informational purposes for public benefit. Be sure to consult your doctor for diagnosis and treatment.
Medically Reviewed by Professor Doctor Alper Demirbaş
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