But ConsumerLab.com’s testing has found that even if lead is found in the leaves used in green tea bags, it doesn’t appear to be absorbed into the water. Cooperman says his team was concerned about lead content in matcha, because people consume the ground green tea leaves directly rather than in bags. However, their testing showed that among the six popular matcha brands they tested—DoMatcha, Encha Organic Matcha, Rishi Teahouse Matcha, Teavana Imperial Matcha, Kirkland Signature Green Tea and The Republic of Tea Double Green Matcha Tea—the powders were not contaminated by lead or other metals, and also did not contain pesticides. As of now, Cooperman says he doesn’t believe lead exposure is a risk in the matcha currently sold in the United States.
Green tea leaves are initially processed by soaking in an alcohol solution, which may be further concentrated to various levels; byproducts of the process are also packaged and used. Extracts may be sold in liquid, powder, capsule, or tablet form. Decaffeinated versions are also available. Green tea extract supplements are accessible over the counter in various forms.
Matcha helps prevent cancer due to the presence of EGCG which has chemopreventive properties. Multiple studies have shown that polyphenols present in this tea prevent the proliferation of malignant cancerous cells, and promotes induction of apoptosis. It also assists in reducing the risk of developing various cancers including bladder, colorectal, breast and prostate cancer.
Scientists at Tufts University compared the “ORAC” (Oxygen Radical Absorbance Capacity, a measurement of the total antioxidant power of foods and other chemical substances) of black and green tea and 22 fruits and vegetables, and found green tea brewed for five minutes outranked even so-called superfoods on the produce list. And EGCC, a catechin found in tea (and shows highest levels in green tea) has been shown to protect the DNA in cells from cancer-inducing changes. Antioxidants are essential for neutralizing and removing free radicals found in the bloodstream that can damage cells and cause disease. This antioxidant ability may be why one benefit of green tea is it’s believed to play a role in cancer prevention. Next, find out more health benefits of drinking any type of tea.
It’s important to point out that while it might be very beneficial, drinking green tea alone likely won’t improve your life span or protect you from disease. Research suggests that a combination of lifestyle components account for the health benefits observed in people that drink tea. The problem with many studies that investigate the effects of green tea is that they are population studies rather than controlled clinical studies, according to the Mayo Clinic. In many of these studies, other lifestyle factors and habits besides drinking green tea are not well-controlled, so it’s difficult to draw conclusions. Overall, studies have found a great number of health benefits of green tea, especially as it relates to anti-aging, but the bottom line is that the quality of your overall diet is really what’s most important.
Both nutritionists we spoke to agree that drinking tea when you wake up and before bed can help your system rev up and calm down, depending on which variety you choose. If you’re a tea fanatic, work in a few cups throughout the day: Unless you’re sensitive to caffeine, you can probably handle five to seven cups a day without any negative side effects, says Lagano.
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Apart from causing premature aging, free radicals are also responsible for causing certain types of cancer. The catechins present in green tea neutralize these free radicals, prevent the formation of carcinogens like nitrosamines and reduce the risk of cancer for people who regularly consume it. Green tea is now being clinically used and prescribed as a home remedy to aid in the prevention of cancer, particularly for those patients at high risk for cancer in the colon, rectum, pancreas, and intestines.