All my friends and family know that I am very passionate about Green Tea. The health benefits are enormous! However I have gone from drinking bucket loads of it to drinking it in moderation. I would recommend a good quality Green Tea rather than cheaper versions
Here are 10 health benefits of green tea that are supported by studies
1. Green Tea Contains Bioactive Compounds That Improve Health
2. Compounds in Green Tea Can Improve Brain Function and Make You Smarter
3. Green Tea Increases Fat Burning and Improves Physical Performance
4. Antioxidants in Green Tea May Lower Your Risk of Some Types of Cancer
5. Green Tea May Protect Your Brain in Old Age, Lowering Your Risk of Alzheimer’s and Parkinson’s
6. Green Tea Can Kill Bacteria, Which Improves Dental Health and Lowers Your Risk of Infection
7. Green Tea May Lower Your Risk of Type 2 Diabetes
8. Green Tea May Reduce Your Risk of Cardiovascular Disease
9. Green Tea Can Help You Lose Weight and Lower Your Risk of Obesity
10. Green Tea May Help You Live Longer
However, Green Tea can have side affects –
It is mostly safe for adults when consumed in moderation. But people with stomach problems, iron deficiency, people with low tolerance to caffeine, pregnant or nursing women, people with anaemia, anxiety disorders, bleeding disorders, heart conditions, diabetic, liver disease and osteoporosis should not consume green tea as it may have side-effects.
Green tea is mostly safe for adults when consumed in moderation. Green tea extract is also considered to be generally safe for most people when taken orally or applied topically on the skin for a short period of time. However, drinking too much green tea )(more than 5 cups a day) is considered to be unsafe. When consumed in excess, green tea side effects include stomach problems, heartburn, diarrhoea, headache, palpitation and arrhythmia, anaemia, tremors and muscle contractions, diabetes, glaucoma, high blood pressure, and osteoporosis.
1. Stomach Problems
The tannins present in green tea increase stomach acidity that may cause stomach ache, nausea, or constipation. For this reason, green tea is not consumed on an empty stomach in Japan and China.
A study on dietary supplementation with green tea extracts found that green tea supplement on an empty stomach can affect the liver.
2. Iron Deficiency and Anaemia
Green tea reduces the absorption of iron from food. Its polyphenols bind to the iron and make it less available to your body. It was previously believed that green tea hindered the absorption of non-heme iron (iron from animal sources) by about 25%.2 But recent findings suggest that it hinders heme or plant iron absorption too.
3. Mild To Serious Headaches
While green tea is considered a safe beverage for migraine patients, it might still be off the diet chart for people with chronic daily headaches. Population-based research studies have shown that caffeine is a risk factor for chronic daily headache onset, and though green tea contains much less caffeine than coffee or other kinds of tea, it is best avoided by such people.
4. Sleep Problems, Nervousness, And Anxiety
No matter how little caffeine green tea contains, it is not a bedtime drink. Caffeine itself can block sleep-inducing chemicals in the brain and increase adrenaline production. Caffeine exerts obvious effects on anxiety and sleep, which vary according to your sensitivity to it. Green tea also contains the amino acid L-theanine, which has the capacity to calm you down but also make you alert and focus and concentrate better, which is at odds with getting a good night’s sleep.
5. Irregular or Accelerated Heartbeat
Caffeine in green tea might cause an irregular heartbeat. It also stimulates the heart muscles to contract when at rest.
Because caffeine affects the movement of food through the food pipe, alternating contraction and relaxation of the food pipe muscles can cause nausea.
Caffeine has a laxative effect. It contributes to peristalsis (the movement of food through the digestive system). It stimulates the colon muscles to contract and then relax, which results in an increased need to move your bowels.
8. Muscle Tremors and Contractions
By regulating calcium ion channels within cells, caffeine forces skeletal muscle contractions.
Caffeine increases the release of acid in your stomach.9 This causes discomfort similar to heartburn.
Caffeine can decrease the flow of blood to the brain, leading to dizziness and motion sickness.
11. Ringing in the Ears
Caffeine can aggravate tinnitus or ringing in the ears.
Caffeine stimulates the central nervous system. It activates neurons when consumed in excess, thus, causing convulsions.
Green Tea can cause side effects because of the caffeine however here is an article about the dangers of Decaffeinated Green Tea!
Decaffeinated Green Tea Warnings!
Natural Versus CO2
The decaffeination process also removes one third to half of the antioxidants found in green tea.
A 2003 study conducted by the UCLA Centre for Human Nutrition found that decaffeinated tea contains only a third of the catechins found in regular tea. Regular tea contains 21 to 103 milligrams of catechins per gram. Decaf contains only 5 to 50 milligrams.
Another separate study by the US Department of Agriculture reported similar findings. According to this study, decaffeinated green tea contains only 56 milligrams of catechins per gram, less than half of the catechins found in a regular tea.
This is bad news. Catechins are the most active antioxidants in green tea. They contribute greatly to its flavours. No wonder many complain that decaf tastes awful.
Where have the catechins gone? The answers lie in the processing. Decaffeinated green tea is usually made using two chemical solvents: ethyl acetate and carbon dioxide.
The most commonly available decaffeinated green tea is “naturally decaffeinated”. It is made using a chemical solvent called ethyl acetate.
During this process, tea leaves are soaked in water to release caffeine and other tea compounds. This is followed by separating the tea leaves from the water, and bringing the water into contact with ethyl acetate to absorb the caffeine. Finally, tea leaves are re-immersed in the water to reabsorb the lost tea nutrients.
Now, here is a problem. Tea leaves are returned to the water that contains traces of ethyl acetate. At high doses, ethyl acetate is known to cause problems to the liver, and to the respiratory and nervous systems.