Four centuries ago, the Chinese began brewing the leaves of this plant and drinking it as a hot beverage.
Today, it is the world’s most popular beverage besides water. Hundreds of millions of people drink it. However, it’s never been as popular in America as in the rest of the world – despite its many benefits.
Just for starters, it’s been shown to slow the growth of at least 11 different kinds of canceri. And there’s more…
This drink is effective against cancers of the esophagus, stomach, colon, bladder, prostate, ovaries, uterus, and breast. And it also reduces lung cancer risk — even in smokers – as well as non-Hodgkin’s lymphoma, and leukemia.ii
And that’s why I rank green tea as the #1 anticancer beverage.
You might think drinking a few cups of tea per day insignificant. But let me assure you, you’d be wrong.
Cancers of the digestive tract, for example, are up to 68% lower in tea drinkers.iii And this may be why major tea-drinking countries have lower cancer rates than America.
The healthiest tea of all…
How tea is processed can make a substantial difference in its nutrient and anticancer value. Black tea accounts for 78 percent of the world’s tea consumption – almost four cups out of every five. Green tea makes up almost all the rest, with oolong comprising only 2% of tea consumption.
Green tea is the least processed tea, richer in antioxidants and beneficial polyphenols than black. Black tea tends to have oxidized catechins and compounds. In this context, oxidation is a bad thing; it destroys nutrients. Black tea is referred to as “fermented” while green tea is unfermented and oolong is semi-fermented.
What makes green tea such a potent
Green tea boasts an exceptional blend of anti-inflammatories and antioxidants.
It also has the uncanny ability to boost your liver function… and detoxify poisons and carcinogens. Green tea enables your immune system to search for and destroy cancer cells, and gives your DNA repair team a helping hand.iv
Researchers think most of green tea’s health benefits come from its polyphenols – recently coined “lifespan essentials”. Polyphenols are plant antioxidants that work in complex ways, above and beyond “normal” antioxidants.
One of the best polyphenols is epigallocatechin gallate (EGCG), which is known to inhibit the growth of breast cancer, and slashes the risk of breast cancer spreading to the lungs.
A Japanese rat study found that 93.8 percent of the rats with mammary tumors given green tea survived – compared to only 33 percent of the non-tea group. The green tea group also had smaller tumors.
A large clinical study in China found that prostate cancer risk decreased with increasing frequency, duration, and quantity of green tea consumption. In plain English, the more green tea you drink, the more often you drink it and the more years you drink it, the less likely you are to fall prey to this disease.
A 2012 study showed PSA levels were lower in men drinking six cups of green tea per day, compared to non-tea drinkers. Scientists believe green tea neutralizes inflammation linked to prostate cancer growth.
One large clinical study found that green tea drinkers are less likely to develop pancreatic cancer. Women who are heavy tea drinkers are half as likely to develop pancreatic cancer. And among men, heavy green tea drinkers are 37% less likely to develop this dreaded and almost-always-fatal type of cancer. But it’s not clear from this study whether green tea is solely responsible for lowering pancreatic cancer risk.
Separately, the National Cancer Institute discovered that green tea’s polyphenols decrease tumor growth and may protect you from ultraviolet light exposure.
Can you cleanse your genes with green tea?
Nature created an ingenious way to reduce your risk of cancer, linked to how your DNA works.
Like a radio or TV, the genes in DNA can be turned on or off. When they’re turned on, they express themselves and give commands. But when they’re “off”, they’re silenced.
Now, those genetic instructions are important for preventing cancer growth.
You see, your “off” button is triggered by something called a methyl group. When attached to your genes, it’s called DNA methylation. This “switch” can become stuck in the off position. But you can clean your genes of those methyl groups and turn them back “on” with the magic of certain plants.
And one of the plants with the most outstanding methyl-plucking talents is green tea.
Should you drink green tea during chemotherapy?
If you’re undergoing chemotherapy, green tea may help the treatment be more effective and yet protect you from its dangerous side effects at the same time.
Two Japanese researchers published several studies showing that green tea and some of its components increase the concentration of chemotherapeutic agents. For example, it increased Adriamycin’s effect 2.1 to 2.9 times, while decreasing the drug’s effect on normal tissue.v
It boosted the effectiveness of Tamoxifen while protecting from liver damage. EGCG improves the cancer-killing effects of Taxol. And green tea can cause resistant cells to be more sensitive to Herceptin.vi
Green tea during chemo helps tumors shrink more than usual, and protects some of the organs chemo is most likely to damage.
But that’s not all…
Green tea’s health benefits
go way beyond cancer
One of the wonders of plant foods is that they confer such a wide range of benefits, for one health condition after another — unlike a pharmaceutical drug that targets one single system.
So it should come as no surprise that green tea also can protect from or reverse other health issues besides cancer:
- Decreases heart attack and stroke risk by lowering cholesterol levels and blood pressure, and slowing hardening of the arteries. Researchers estimate that heart attack risk decreases by 11% with the consumption of 3 cups of tea per day.vii
- Kills certain bacteria, especially in the bladder. Tea drinkers have a 40% lower incidence of urinary tract infections.
- Aids digestion by increasing helpful bacteria (probiotics) in your intestines, and decreasing harmful ones.
- Speeds metabolism and helps you lose weight.
- Reduces all-cause mortality, as shown by a 2006 study published in Journal of the American Medical Association.viii
- Significantly lowers risk of death – especially from heart disease — for those who drink at least 5 cups of green tea daily compared to those who drink less than one cup a day, according to an 11-year study of 40,000-plus Japanese participants ages 40 to 79.ix
- Helps regulate blood sugar and glucose levels. And may help prevent onset of Type 1 diabetes and slow its progression.
- Helps reduce inflammation linked to inflammatory bowel disease and may help prevent colon cancer.
- When taken in a supplement, may help keep colds and flu at bay, according to a 2007 controlled study that compared green tea users to a group on placebo. x
How to get a bigger boost from green tea
Green tea is a nutritional powerhouse on its own. But it may be even better when combined with certain other nutrients. Consider pairing your green tea with the following for benefits far greater than the sum of the parts.
- Add citrus, which stabilizes catechins in your gut and increases absorption into your bloodstream. xi
- Enjoy it with capsaicin – the compound that gives chili peppers their pizzazz – for increased feelings of fullness and weight loss. xii
- Green tea and watermelon, tomatoes, and pink grapefruit (think lycopene) can help men dodge prostate cancer. xiii
- Eat medicinal mushrooms (or take mushroom supplements) while sipping your tea for added cancer protection. xiv
- Green tea triples turmeric’s anticancer effects. And turmeric enhances green tea’s anticancer capabilities by a factor of eight.xv Wow!
How to choose and prepare green tea
It’s important to buy organically grown tea. Several non-organic brands were analyzed and found to contain traces of DDT. Obviously, a drink intended to reduce your cancer risk should not contain toxins that increase your risk.
Create your best-tasting, most nutritious tea by steeping your tea bag in hot water for three minutes. Tea connoisseurs say green tea becomes too bitter when brewed longer. The recommended brewing time is shorter than the four minutes needed to bring black tea to its peak of flavor.
Forget about bottled green tea. A 2010 study presented at the American Chemical Society showed some 16-oz. bottled teas contain fewer polyphenols than 8 oz. of brewed tea.
For maximum cancer protection, drink eight to ten cups per day. Please note: the caffeine in the tea appears to be important to its anticancer effects.
To be honest, I couldn’t drink eight cups (or even three) per day. I’d be up all night. But most people are much less sensitive to caffeine than I am. If drinking that much tea isn’t your cup of tea, you can take it in supplement form at the rate of two 250-mg tablets per day.
In general, green tea contains much less caffeine than black tea, and a mere fraction of what’s found in a typical cup of coffee. So you may be able to tolerate the high levels of intake that are said to yield the most benefits.
Caution: Some people should not take green tea
Are you a good candidate for green tea? While green tea is generally well tolerated, it may be contra-indicated for certain people. Is it right for you? Check this list, or talk with your doctor:
- Those with heart problems, high blood pressure, kidney or liver problems, stomach ulcers, and psychological disorders (especially anxiety) should avoid green tea.
- Pregnant and nursing women should avoid it.
- Those with anemia, diabetes, glaucoma, or osteoporosis should consult their health care provider before drinking it.
It’s important to remember than not everyone tolerates every natural plant equally well. If you have any of these conditions, please do some further research and/or talk with your health care provider before jumping in.
Lee Euler, Publisher