Monday August 19, 2019

Study Shows That 3 Cups of Coffee or Tea Daily May Cut Risk of Stroke

Are you an ardent coffee or tea lover, but advised to avoid caffeinated beverages due to your heart conditions Cheer up, drinking upto three cups of coffee or tea a day is safe as well as reduce irregular heartbeat and stroke risk, a study says.

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Are you an ardent coffee or tea lover, but advised to avoid caffeinated beverages due to your heart conditions Cheer up, drinking upto three cups of coffee or tea a day is safe as well as reduce irregular heartbeat and stroke risk, a study says.

A single cup of coffee contains about 95 mg of caffeine. It acts as a stimulant to the central nervous system and works to block the effects of adenosine — a chemical that causes atrial fibrillation (AFib).

AFib is the most common heart rhythm disorder, causes the heart to beat rapidly and skip beats, and if left untreated, can cause strokes.

The results suggest that caffeine intake of up to 300 mg per day may be safe for arrhythmic patients.

Jasmine Green tea and its benefits
Jasmine Green tea. Pixabay

“There is a public perception, often based on anecdotal experience, that caffeine is a common acute trigger for heart rhythm problems,” said lead author Peter Kistler, Director at Melbourne’s Alfred Hospital.

But, “caffeinated beverages such as coffee and tea have long-term anti-arrhythmic properties mediated by antioxidant effects and antagonism of adenosine,” he added.

For the review, published in the journal JACC: Clinical Electrophysiology, the team analysed multiple population-based studies.

A meta-analysis of 228,465 participants showed that AFib frequency decreasing by 6 per cent in regular coffee drinkers, and an analysis of 115,993 patients showed a 13 per cent reduced risk.

Nestle Pays Starbucks $7.1bn to Sell its Coffee.
Nestle Paid Starbucks $7.1bn to Sell its Coffee. Pixabay

Another study of 103 post-heart attack patients who received an average of 353 mg of caffeine a day showed improvement in heart rate and no significant arrhythmias — or abnormal heart rhythms, that cause the heart to beat too fast, slow or unevenly.

However, in two studies, where patients drank at least 10 cups and nine cups of coffee per day, showed an increased risk for ventricular arrhythmias (VAs) — a condition in which the lower chambers of the heart (ventricles) beat very quickly.

Also Read: 5 Health Benefits of Drinking Tea

On the other hand, patients with pre-existing heart conditions who consumed two or more energy drinks — that contains concentrated caffeine — per day reported palpitations within 24 hours. (IANS)

Next Story

Too Much Coffee During Pregnancy Bad for Baby’s Liver, Says New Study

For the study, the researchers investigated the effects of low (equivalent to 2-3 cups of coffee) and high doses (equivalent to 6-9 cups of coffee) of caffeine given to pregnant rats, on liver function and hormone levels of their offspring

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A patron holds an iced beverage at a Starbucks coffee store in Pasadena, Calif., July 25, 2013. VOA

Ladies, limit your tea or coffee intake if you’re expecting, as researchers have found that excess caffeine intake during pregnancy may impair baby’s liver development and increase the risk of liver disease in adulthood.

In a study on rats, it was found that pregnant rats, which were given caffeine, had offspring with lower birth weight, altered growth and stress hormone levels and impaired liver development.

Published in the Journal of Endocrinology, the study indicates that consuming 2-3 cups of coffee a day may alter stress and growth hormone levels in a manner that can impair development of baby’s liver.

“Our results indicate that prenatal caffeine causes an excess of stress hormone activity in the mother, which inhibits IGF-1 activity for liver development before birth. However, compensatory mechanisms do occur after birth to accelerate growth and restore normal liver function as IGF-1 activity increases and stress hormone signalling decreases,” said study co-author Yinxian Wen from the Wuhan University in China.

Insulin-like growth factor 1 (IGF-1) is a hormone that plays an important role in childhood growth. “The increased risk of fatty liver disease, caused by prenatal caffeine exposure, is most likely a consequence of this enhanced, compensatory postnatal IGF-1 activity,” Wen said.

Technology, Privacy
A model wears the Owlet Band pregnancy monitor at the Owlet booth at CES International, Jan. 9, 2019, in Las Vegas. The device can track fetal heart rate, kicks and contractions. VOA

For the study, the researchers investigated the effects of low (equivalent to 2-3 cups of coffee) and high doses (equivalent to 6-9 cups of coffee) of caffeine given to pregnant rats, on liver function and hormone levels of their offspring.

“Our work suggests that prenatal caffeine is not good for babies and although these findings still need to be confirmed in people, I would recommend that women avoid caffeine during pregnancy,” Wen said.

Also Read: Qualcomm, Sony Ramp up 5G Testing in UK with New Lab

Sweta Gupta, Clinical Director and Senior Consultant at Fertility Solutions, Medicover Fertility in Delhi, agreed that too much of caffeine could be harmful for the baby. “Pregnancy is a time of craving and mood swings. Some consider coffee for relief in such situations,” she said.

However, according to Harshal Rajekar, Consultant Gastro Surgeon, Columbia Asia Hospital in Pune, there is hardly any evidence showing that caffeine is harmful for pregnant woman or her baby’s liver though it’s true that excess of caffeine can affect sleep and may deprive the mother of adequate rest during pregnancy, which can, in turn, harm both the mother and the child. (IANS)