How Is Matcha Different from Other Green Teas? Posted on 7 Dec 22:56 , 0 comments
Holistic Nutritionist Tips Video by Valeria Lipovetsky
In Japan, we used green tea as a medicine long time ago. So, we knew the benefits of green tea from our experience. With advanced science and technology, we are getting to know why green tea is healthy food for human being.
The world seems to have gone bonkers for matcha, putting it in everything from lattes to brownies. We reveal if it's really worth joining the green party
Why all the fuss about matcha?
The world seems to be obsessed with matcha. Beautiful people are knocking back shots of it at fashion shows. Gwyneth and her tribe are toting jars of it to yoga classes. Cafes are serving it in lattes and chefs are turning it into everything from soup to brownies. Japan’s most revered form of green tea has now become a must-have ingredient for the ‘wellness’ set. But what’s the truth behind the health claims? Here’s what you need to know if you want to join the green party.
What is matcha?
Matcha is a stone-ground powdered green tea used in traditional Japanese tea ceremonies. According to the 8th century Zen priest Eisai, who introduced the tea to Japan, matcha is “the ultimate mental and medical remedy and has the ability to make one’s life more full and complete”.
What are the health benefits?
Matcha contains small amounts of various vitamins and minerals, but is most prized for being rich in polyphenol compounds called catechins, a type of antioxidant. Because matcha is made from ground up whole tea leaves, it’s a more potent source of catechins than standard green tea, which is consumed as an infusion and the leaves discarded. One study found that matcha contains three times more of the catechins called epigallocatechin gallate (EGCG) – an antioxidant linked to fighting cancer, viruses and heart disease – than other kinds of standard green tea.
Varies studies suggest that these catechins might confer health benefits, although the evidence is inconclusive. According to the National Cancer Institute of the US, more than 50 epidemiological studies looking at tea consumption and cancer risk have been published since 2006. “The results of these studies have often been inconsistent”, it says “but some have linked tea consumption to reduced risks of cancers of the colon, breast, ovary, prostate, and lung.” Another study published in the American Journal of Clinical Nutrition suggests matcha might be linked to weight loss, with researchers concluding that a daily cup of the green stuff “might be useful in the prevention and improvement of lifestyle-related diseases, mainly obesity”. Other clinical tests suggest matcha can speed physical recovery after workouts, promote cell strength and boost immunity. And with only a small amount of caffeine –24–39mg per cup – matcha fans say it delivers a feeling of “calm alertness” with none of the jitters that can come with coffee.
Matcha brownies are probably not a health food...
The National Cancer Institute points out that any potential health benefits depend on how matcha is prepared and consumed. It says that although iced and ready-to-drink matcha and other teas are becoming more popular, they don’t contain the same amount of key nutrients as brewed tea. And the addition of other ingredients dilutes the benefits further. This means that matcha lattes, smoothies and brownies are nowhere near as healthful as a cup of properly brewed tea. That said, many people find the distinctive green tea flavour of matcha delicious in its own right.
Catechins in green tea are known to have many beneficial health properties. Recently, it has been suggested that matcha has greater potential health benefits than other green teas. Matcha is a special powdered green tea used in the Japanese tea ceremony. However, there has been no investigation to quantitate the catechin intake from matcha compared to common green teas. We have developed a rapid method of analysis of five catechins and caffeine in matcha using micellar electrokinetic chromatography. Results are presented for water and methanol extractions of matcha compared with water extraction of a popular green tea. Using a mg catechin/g of dry leaf comparison, results indicate that the concentration of epigallocatechin gallate (EGCG) available from drinking matcha is 137 times greater than the amount of EGCG available from China Green Tips green tea, and at least three times higher than the largest literature value for other green teas.
Author : David J.Weiss Department of Chemistry, University of Colorado at Colorado Springs, Colorado Springs, CO 80918, USA
It is known that many anti-tumor drugs have apoptosis-inducing activity and apoptosis-inducing compounds may be expected to have potential anti-tumor activity. We have found that green tea catechins and tea high-molecular-weight components have apoptosis-inducing activity. When apoptosis-inducing activity of lipid derivatives of gallic acid was examined in U937 cells, we found the importance of a gallate moiety and hydrophobic nature. We also found apoptosis-inducing activity of an ethanol soluble fraction in driselase digests of green tea residues. In the next experiment, examination of effects of tea components on expression of apoptosis-related genes suggested that the apoptosis-inducing mechanism of a black tea high-molecular-weight component was different from that of EGCG. As for the mechanism of apoptosis induction by EGCG, it was shown that EGCG bound Fas to activate caspase 8, leading to apoptosis. In the in vivo experiments, it was shown that a combination of slindac and EGCG effectively reduced the member of aberrant cript foci in an azoxmethane-induced rat colon cancer model by stimulating apoptosis. Finally, EGCG was found to affect signal transduction through a MAP kinase pathway and to repress expression of matrix metalloproteinase. Thus, the present results encourage the view that intake of green tea is beneficial for cancer prevention.
A summary of a research paper by Mamoru Isemura, Prof ＆PhD Division of Food Science and Biotechnology, University of Shizuoka