Green tea was originated in the China and is prepared using the leaves of Camellia sinensis. Green tea has powerful health benefits and is widely used by the people of western culture. It is also used as a raw material in many edible things like dietary supplements, beverages, health foods, cosmetic items and etc. Varieties of green tea are found according to the production processing, horticulture, and harvesting time. A lot scientific and medical study has determined that green tea has long purported health benefits. It has been noted that regular users of the green tea have low risk of heart diseases and some cancer types. It boosts up the metabolic rate and stimulates the fat oxidation as well as maintains the normal heart beat rate. The flavonoids phytochemicals present in the green tea performs antioxidant and anticarcinogenic functions.
Benefits of Green Tea
Reduces Risk of Cancer
- Green tea makes a person able to fight with cancer and reduces the risk of cancer to a great extent. The antioxidant property of the green tea works 100 times more effectively than Vitamin C and 24 times Vitamin E.
Lowers Bad Cholesterol Level
- Green tea helps people to be prevented from the heart diseases and stroke as it lowers the cholesterol level in the body.
Promotes Heart Cells Recovery
- It also prevents the cell death during the heart attack as well as speeds up the heart cells recovery.
Fights with Free Radicals
- The antioxidant (polyphenols) property of the green tea fights against the free radicals, promotes longevity and prevents ageing. Antioxidants like catechins (epigallocatechin-3-gallate) fights with free radicals (cause cancer, atherosclerosis, blood clots by damaging DNA).
Boosts Metabolism Rate
- Green tea helps in losing weight through burning extra fat as well as boosting the metabolism rate naturally. Regular intake of green tea can help burning around 70 calories in one day.
Reduces Risk of Diabetic Complications
- It helps preventing from the diabetes and stave off dementia.
Prevents from Cancer
- Woman undergone surgery of breast cancer with Stage I and Stage II are found increased the consumption of green tea and found the with lesser reappearance of cancers. It also prevents the occurrence of stomach cancer, pancreatic cancer, prostate cancer, esophageal cancer and colorectal cancer. Having two cups of green tea daily reduces the risk of lung cancer.
Fights with Obesity
- Green tea fights with the obesity and lowers the LDL (bad cholesterol) which is the main factors of developing heart disease and diabetes.
Increases Fat Oxidation and Metabolism
- Taking caffeinated green tea helps in losing more weight by increasing the fat oxidation and metabolism.
Maintains Blood Glucose Level
- Green tea maintains the blood glucose levels and reduces the risk high blood sugar and thus diabetes.
Restore Damaged Brain Cells
- Green tea protect the brain cells from dying as well as restore the damaged brain cells and reduce the risk of deterioration caused by the Alzheimer’s or Parkinson’s disease.
Destroys Harmful Bacteria and Virus
- The antioxidant known as catechins present in the green tea which has the ability to destroy the bacteria and viruses causing dental caries, influenza, throat infections, thus prevents the tooth decay.
Reduces Risk of Hypertension
- It maintains the blood pressure and reduces the risk of high blood pressure.
- The amino acid called Theanine is found in green tea which has relaxing and tranquilizing effect, thus beneficial for depression.
- Green tea is good skin care agent as it reduces wrinkles and signs of ageing due to its antioxidant (oligomeric proanthocyanidins) and anti-inflammatory property.
Maintain Oral Health
- It helps to maintain the good oral health because of the natural fluoride, polyphenols, catechins presence which can kill bacteria and virus.
Promotes Bone Building
- It lessens the risk of osteoporotic fractures of the bones by increasing the number of bone building cells.
Hydrates Body and Protects from UV Rays
- It helps in hydrating the body and provides may health benefits. It also protects from the harmful ultraviolet rays.
Improves Brain Power
- It helps preventing and treating the neurological diseases, regulates the learning and memory power of the brain by maintaining the brain cells.
- It boosts the immunity system and makes able to fight from infections just because of the availability of Polyphenols and Flavonoids.
Prevents from Rheumatoid Arthritis
- It lessens the risk of rheumatoid arthritis.
How Much Green Tea in a Day
Drinking how many cups of the green tea depends on the purpose you are drinking for. Drinking one or two cups daily is sufficient for inhibiting the cancer growth. However it is recommended by the researchers that having two to three cups a day is proved to be beneficial for health.
Though, drinking five cups of green tea reduces the risk for stomach cancer. In order to lose weight or boost up metabolism, seven cups a day is needed to have better results. Having 10 cups of it is safe but the upper limit.
Disadvantages of Green Tea
- If the person is sensitive to the caffeine then only one cup of the green tea is the limit otherwise they may develop sleeping problems, restlessness, tremors, irritation, heart palpitations and loss of appetite.
- Because of the tannins available in the green tea, it decreases the iron and folic acid absorption in the body. So it should be taken care while being pregnant or going to conceive.
- Because of the availability of the caffeine, green tea causes insomnia. However, it contains less caffeine than the coffee.
- Drinking too much of the green tea can lead towards risk of liver and kidney damage. The supplements of green tea have more polyphenols than the single cup green tea.
- Drinking green tea daily may cause nausea, insomnia, frequent urination, constipation and upset stomach in some person specially when taken in the morning in empty stomach. Green tea may cause serious problems in the people having peptic ulcer.
- Some of the people may feel heart palpitations and nervousness because of the caffeine in green tea.
- It may cause iron deficiency anemia because of the low iron absorption in the intestine because of tannins.
- People having heart disease, anxiety problems, high blood pressure or hyperthyroidism should avoid or consult to the doctor before having green tea.
- Having many cups of green tea may cause risk to kidney and liver.
- It should be avoided by the pregnant women as it can interfere with the growth of child and create some complications like premature birth, low birth weight, sometimes fatal death (when taken in high amount.
- Young children should be avoided drinking green tea otherwise it may interfere with the growth hormones.
- It should also be avoided in the people having glaucoma as it can raise the pressure inside eyes.
- High intake of green tea may prohibit the calcium absorption in the bones and lead to the osteoporosis.
Nutritional Facts about Green tea
- Water: 99.5%
- Antioxidants and Alkaloids
- Tannin, theophylline, caffeine
- No calorie, fat, carbohydrate and protein in green tea
- Vitamins: A, D, E, C, B, B5, K
- Minerals: Manganese, zinc, selenium, chromium
- Epigallocatechin-3-gallate (EGCG)