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For decades many have praised the therapeutic properties of tea and interestingly consuming green tea was even purported to have brought a thirteenth century Japanese official back from his death bed. Green tea which is made from the Camellia Sinensis plant has been popular among the masses for several decades for its immensely professed health benefits, whether be it weight loss, cure for solid tumor cancers and leukemia.
Green tea has the rich presence of catechin polyphenols, especially epigallocatechin gallate, which is considered to be vital for well-being. Green tea has been used medicinally for several years, since it yields enormous health benefits (including helping fight free radicals, prolonging life span, curing diabetes and dental cavities, inhibiting cancer growth and lowering cholesterol).
Drinking green tea can be favourable, since the L-theanine in it is believed to offer copious benefits for health, like easing anxiety and reducing the risk of cardiovascular disease. Green tea contains a mixture of polyphenolic compounds like flavanols, flavandiols, flavonoids and phenolic acids, which are specialized antioxidants that try to inhibit the cells causing cancer and significantly tries to exterminate the process.
It may even shrink the growing risk of cancer, yet did you know that green tea has its side effects? It is important that you consume it in moderation. Drinking green tea during pregnancy is not good, since it contains caffeine. Caffeine intake is always discouraged during pregnancy. Those with low tolerance of caffeine will suffer from ingesting it, as it can cause heartburn, headache, diarrhoea, high blood pressure and diabetes. So, let's find out the downside of drinking green tea.
1. Gastrointestinal and neurological
Green tea is considered to be a beverage in China for more than 4000 years. However, when the tea is consumed beyond moderation, it can have adverse effects. Green tea contains caffeine and antioxidant polyphenols. It is generally touted to be good for a variety of health conditions, especially cancer prevention and cardiovascular disorders. It is safe for some people if they consume at least doses of 1g/sq m, which includes three times daily. However, if it corresponds more than 7 to 8 cups (24 ounces) of tea, three times daily, then it can have side effects. The adverse effects can be caffeine-related like gastrointestinal and neurological.
2. Iron deficiency
Ingesting green tea would interfere with the nutrient absorption. Consuming green tea along with dietary iron (red meat and dark leafy greens) can lessen the health benefits of the tea. It the main compound of the tea coalesces with the iron, then it loses its true potential of antioxidant. This decreases the absorption of iron from food. A lack of iron can lead to shortness of breath, headache and fatigue. You can consume green tea 2 hours before or after the meal, so that you won't lose out on iron. The tannin content in green tea will reduce the bioavailability of iron. It has to be taken either 2 hours before or 4 hours after iron administration.
You can suffer mild headaches in the long run if you consume more quantities of green tea for a very long period of time. It will cause acute headaches because of the caffeine present in the beverage.
4. Sleep-related problems
Never drink green tea before you hit the bed. Caffeine tries to block sleep-inducing elements in the brain and thereby will make you alert and focused. Green tea has amino acid L-theanine, which is said to calm you down and help you concentrate better, yet it would try to deprive you of your sleep. Sometimes, due to the caffeine content in the tea, it can make you irritable, because of insomnia. Pregnant women and women who breastfeed need to limit the intake of green tea, as it has caffeine content. The tea can pass into breast milk and will cause sleep disorders in the nursing infant. Insomnia, irritability and nervousness occurs due to caffeine content.
5. Gastric acid
Individuals suffering from peptic ulcers should pass up drinking green tea, since it would try to stimulate gastric acid.
6. Menopause symptoms
Sipping hot tea like jasmine or green tea can be of great help, especially when you want to relax but then the reality is it can bring about unpleasant menopausal symptoms, since these types of teas have caffeine content. Halting caffeine intake during post menopause can cure menopause symptoms, however, one can consume green tea for well-being only when it has less caffeine or no caffeine, which includes Gyokuro, Joujicha greem tea and Bancha green tea.
7. Kidney damage
The polyphenols found in green tea are beneficial for preventing cancer and heart disease, yet large consumption of it can cause certain health problems in the liver and kidney. A leading author Chung Yang of Rutgers from the State University of New Jersey has stated that 10 small cups of green tea is fine but the problem only arises when people take supplements that contain 50 times as much polyphenol than a single cup of tea.
8. Irregular Heartbeat
The caffeine content in green tea can speed up your heart rate and cause an irregular heartbeat. This can also cause heart palpitations, which may result in chest pain and this sudden change in the normal heart rate could pose a serious health risk.
Excessive consumption of green tea can lead to muscle spasms and twitching. Do you know why? Because caffeine has been linked to restless leg syndrome, which forces the skeletal muscles to contract and cause muscle spasms in the legs.
Caffeine has a laxative effect, which when consumed excessively can lead to passing of loose stools. Also, if you are new to green tea, it may also cause diarrhoea. So, drink green tea in a moderate amount and do not drink it on an empty stomach.
People suffering with diabetes should avoid having too much of green tea, as it might interfere with blood sugar control. Patients with type 2 diabetes also should not drink green tea, as it may cause interference in your insulin levels.
The caffeine content in green tea inhibits calcium absorption in the body. Excessive consumption of green tea can elevate the rate of calcium excretion, which may lead to bone diseases like osteoporosis.