While there is no miracle cure for cancer, many individuals turn to complementary and alternative therapies to support their overall well-being during cancer treatment and recovery. One such option is incorporating green tea into their daily routine. In this article, we'll explore the world of Japanese green tea and how it can benefit cancer patients in 2023.
Green Tea and Cancer - What the Research Says
1. Antioxidant Properties:
Green tea is rich in polyphenols, particularly epigallocatechin gallate (EGCG), which have well-documented antioxidant properties. Antioxidants help neutralize harmful free radicals, preventing oxidative damage to cells and DNA.
A study published in the "Journal of Nutritional Biochemistry" in 2005 (Yang et al.) demonstrated that EGCG effectively scavenged free radicals and reduced oxidative stress in cell culture models.
2. Cancer Cell Inhibition:
Laboratory studies have shown that green tea polyphenols, particularly EGCG, can inhibit the growth of cancer cells and induce apoptosis (cell death) in various types of cancer.
A study in the "Cancer Letters" journal in 2007 (Shanafelt et al.) explored the role of EGCG in inhibiting the proliferation of chronic lymphocytic leukemia (CLL) cells.
Research published in "Cancer Prevention Research" in 2010 (Sartippour et al.) investigated the effects of green tea extract on breast cancer cells, finding that it inhibited cell growth.
3. Breast Cancer Stem Cells:
Green tea has shown promise in targeting breast cancer stem cells, which are implicated in the initiation and progression of breast cancer.
A study published in "Cancer Research" in 2009 (Kannappan et al.) found that EGCG disrupted the self-renewal process of breast cancer stem cells.
4. Prostate Cancer:
Several epidemiological studies have suggested an association between green tea consumption and a reduced risk of prostate cancer.
A study in the "American Journal of Epidemiology" in 2007 (Kurahashi et al.) reported that higher green tea intake was linked to a lower risk of advanced prostate cancer.
Another study published in "Cancer Causes & Control" in 2009 (Jian et al.) found that green tea consumption was inversely associated with the risk of prostate cancer in Chinese men.
5. Clinical Trials:
Clinical trials have investigated the potential benefits of green tea and its extracts in cancer treatment.
The "Journal of Clinical Oncology" published a randomized phase II trial in 2013 (Choan et al.) that examined the effects of green tea extract on patients with androgen-independent prostate cancer.
Clinical trials have also explored the use of green tea extract in combination with conventional cancer therapies, focusing on its potential to enhance treatment efficacy.
While these findings are promising, it's essential to note that more research is needed to establish definitive recommendations for the use of green tea in cancer prevention and treatment. Additionally, individual responses to green tea can vary, and it should not be considered a standalone treatment for cancer. It should be seen as a complementary component of a broader approach to cancer care that includes medical treatment, a balanced diet, exercise, and emotional support. Patients should always consult with their healthcare providers before making significant dietary changes or incorporating supplements into their treatment plans.
How many cups of green tea to drink in a day?
In the book "Anticancer: A New Way of Life" by Dr. David Servan-Schreiber, he does recommend green tea as part of a cancer-fighting diet. However, he doesn't specify an exact number of cups of green tea that cancer patients should drink. Instead, he emphasizes the potential benefits of green tea's antioxidants, particularly epigallocatechin gallate (EGCG), and suggests incorporating it into one's diet as a healthy beverage choice.
If you're specifically interested in incorporating green tea into your diet for its potential health benefits, it's a good practice to consult with a healthcare provider. The recommended amount of green tea can vary depending on factors such as your overall health, tolerance to caffeine, and specific health conditions.
Other Health Benefits of Green Tea
Amino acids: Green tea, particularly matcha tea, is abundant in L-theanine, an amino acid known to promote relaxation, reduce anxiety, and improve brain function. This can be particularly helpful for cancer patients dealing with the stress and anxiety that often accompany a cancer diagnosis.
Vitamin C: Green tea contains vitamin C, which can support the immune system and overall health. A strong immune system is essential for cancer patients to help them better cope with treatment and reduce the risk of infection.
Low caffeine: Green tea typically contains less caffeine than black tea or coffee, making it a suitable choice for individuals who are sensitive to caffeine or looking to reduce their caffeine intake.
Cancer prevention: Some studies have suggested that green tea may help prevent the development of certain types of cancer, such as prostate and breast cancer. While more research is needed, the potential cancer-fighting properties of green tea are promising.
How to prepare Japanese Green Tea To Preserve its Anticancer Properties
To preserve these beneficial compounds when preparing Japanese green tea, it’s important you follow these steps:
1. Choose High-Quality Green Tea:
Start with a high-quality Japanese green tea, preferably one that is fresh and hasn't been stored for too long. Look for teas labeled as "sencha" or "matcha," which tend to have higher levels of antioxidants.
2. Use Fresh and Pure Water:
The quality of water you use can significantly impact the flavor and potential health benefits of your tea. Use fresh, cold, and filtered water to ensure it's free from impurities and has a neutral taste.
3. Measure the Tea Leaves or Powder:
Depending on the type of green tea you're using, measure the appropriate amount:
- For loose-leaf green tea (sencha or gyokuro): Use about 1 to 1.5 teaspoons of tea leaves per 8 ounces (240 ml) of water.
- For matcha: Use about 1/2 to 1 teaspoon of matcha powder per 8 ounces (240 ml) of water.
4. Water Temperature:
Heat the water to the appropriate temperature:
- For sencha: Use water at around 160-180°F (71-82°C). This is below boiling.
- For matcha: Use water at about 175°F (80°C). It should not be boiling.
5. Preheat the Teapot or Teacup:
Pour some hot water into the teapot or teacup to preheat it. Swirl the hot water around and then discard it.
6. Steeping Time:
For sencha:
- Steep the tea leaves for 1-2 minutes for the first infusion.
- For subsequent infusions, increase the steeping time slightly.
For matcha:
- Whisk the matcha powder into the hot water vigorously until it's well-dissolved and frothy.
7. Avoid Boiling:
Never boil green tea leaves or matcha powder, as this can destroy the delicate catechins and affect the flavor.
8. Use the Right Tea Utensils:
Use a kyusu (Japanese teapot) for sencha and a chawan (matcha bowl) and bamboo whisk for matcha to ensure the best flavor and preparation.
9. Storage:
Store your green tea in an airtight container in a cool, dark place away from moisture, light, and strong odors to preserve its freshness and antioxidant content.
10. Enjoy Promptly:
Japanese green tea is best enjoyed shortly after brewing to maximize its flavor and potential health benefits. Don't let it sit for too long before drinking.
By following these steps, you can prepare Japanese green tea in a way that helps preserve its anticancer properties while enjoying its delicious taste and aroma. Additionally, incorporating green tea into a balanced diet and a healthy lifestyle may contribute to its potential health benefits.
Types of Japanese Green Tea
Okay so not only do we know drinking Japanese green tea not only helps us fight cancer, but we also know how to prepare it properly, it’s now time to get your hands on some. It would surprise you that Japanese green tea comes in various forms, each with its own unique flavor profile and health benefits. Now, if you’re new to drinking green tea, you can experiment a little and see which one is to your liking and taste.
Here are some of the most popular types of Japanese green tea:
Sencha Tea: Sencha is the most common and widely consumed type of green tea in Japan. It is made from whole green tea leaves and has a refreshing, grassy flavor. Sencha is rich in catechins, including EGCG, making it a great choice for cancer patients.
Matcha Tea: Matcha is a finely ground green tea powder that is traditionally whisked with hot water. It contains the entire leaf and is exceptionally high in antioxidants. Matcha is known for its vibrant green color and earthy, umami flavor. It's a great choice for those looking to maximize their green tea consumption.
Gyokuro Tea: Gyokuro is a premium Japanese green tea known for its sweet, mellow flavor and vibrant green color. It is grown in the shade, which increases its chlorophyll content and unique taste. Gyokuro is high in L-theanine and EGCG, making it a top choice for cancer patients.
Sencha Powder: Similar to matcha, sencha powder is made from powdered sencha leaves. It offers a convenient way to enjoy the benefits of sencha without the traditional steeping process.
Hojicha Tea: Hojicha is a roasted green tea with a nutty, slightly smoky flavor. It is lower in caffeine than other green teas and is often well-tolerated by those with caffeine sensitivity.
Genmaicha Tea: Genmaicha is a green tea blend that includes roasted brown rice, giving it a unique flavor with hints of popcorn or nuts. It's a mild, low-caffeine option that can be enjoyed throughout the day.
Choosing the Best Japanese Green Tea Brands in 2023
When selecting green tea for cancer patients, it's essential to choose high-quality tea from reputable brands.
If possible go for organic and choose one that don’t use plastic tea bags - especially if you are going to drink several cups a day.
Here are some brands that offer organic products:
1. Ito En - Ito En is one of Japan's largest and most respected tea companies.They offer a variety of organic green teas, including sencha and matcha.
2. Harney & Sons - While not a Japanese brand, Harney & Sons offers high-quality organic Japanese green teas, including sencha and genmaicha.
3. Rishi Tea -Rishi Tea is known for its organic and sustainably sourced teas. They offer organic Japanese green teas like sencha and gyokuro.
4. The Republic of Tea - The Republic of Tea offers an organic line of green teas, including some Japanese varieties like genmaicha.
5. Numi Organic Tea - Numi offers a range of organic green teas, including sencha and jasmine green tea.
6. Kirkland Signature (Costco Brand)- If you have access to Costco, Kirkland Signature offers organic Japanese green tea bags that are available on Amazon.
When selecting green tea for cancer patients, consider their preferences in terms of flavor and caffeine content. Some individuals may prefer milder options like sencha or genmaicha, while others may opt for the robust flavor and caffeine kick of matcha or gyokuro.