DRINKING brewed tea using bottled water instead of tap water is much healthier, according to a new study.
Researchers at Cornell University, using bottled water in brewing tea double the amount of the antioxidants compared when tea was brewed using only tap water.
However, researchers justified that drinking green tea for taste, tap water is better, ensuring it’s not too bitter.
The natural antioxidants in green tea called EGCG (epigallocatechin gallate) is said to be beneficial for the brain and heart.
During the study, the green tea infusion was brewed for three minutes and then strained through a fine mesh strainer.
Results showed levels of ECGC in the green teas were “drastically reduced” in those brewed with boiled tap water. No effect was noticed in the black teas.
The researchers said this is because the levels of calcium, magnesium and iron are higher in tap water. They believed that bottled water was able to extract the EGCG more efficiently.
Consumers liked green tea brewed using tap water more than using bottled water, because it produced a sweeter taste.
But there was hardly any difference in black tea brewed in either tap water or bottled water.
Green tea originated in China and is made from Camellia sinensis leaves. ECGC has been found to stave off or slow the progression of Alzheimer’s disease in a 2015 University of Missouri study, when combined with physical activity.
But other components found in green tea - caffeine, amino acid L-theanine and other catechins have shown possible health benefits in studies. These include lower cholesterol, a lower risk of Parkinson’s and even cancer. They have also been shown to boost metabolism.
But you need to watch out the amount of green tea you consume especially if it is in the form of supplements.
According to the European Food Safety Authority, taking more than 800mg of green tea catechins each day may pose health concerns especially on the liver. However, officials were unable to confirm a safe dose.