Drinking Chunmee Green Tea in moderation is mostly safe for adults. However, people with stomach problems, iron deficiency, low tolerance to caffeine, pregnant or lactating women, anemia, anxiety, bleeding disorders, heart disease, diabetes, liver disease and osteoporosis should not drink green tea , Because it may have side effects.
Green tea is one of the oldest herbal teas known to man. It quickly gained outstanding performance in the West because of its health benefits, and weight loss is one of them. Some of these health benefits are supported by research, and some still require research. But also need to pay attention to side effects.
Drinking green tea in moderation is mostly safe for adults. Green tea extract is considered to be generally safe for most people when taken orally or topically on the skin for a short period of time. However, drinking too much green tea (more than 5 cups per day) is considered unsafe. When consumed in excess, green tea side effects include stomach problems, heartburn, diarrhea, headache, palpitations and arrhythmias, anemia, tremors and muscle contractions, diabetes, glaucoma, high blood pressure and osteoporosis.
People who have a natural low tolerance to caffeine will experience these symptoms even if they take a small amount. Some people may already have problems that may be aggravated by the intake of green tea. These people should limit their consumption of green tea to no more than 2 cups per day. The time to drink green tea is also very important.
Side effects of green tea
Like all teas, green tea contains caffeine; excessive caffeine intake can cause or aggravate various problems, including the following:
The tannins in green tea increase the acidity of stomach acid, which may cause stomach pain, nausea or constipation. For this reason, green tea is not consumed on an empty stomach in Japan and China.
Research on dietary supplements of green tea extract found that supplementing with green tea on an empty stomach will affect the liver.
Brew your green tea in water between 160° and 280°F. Don't eat it on an empty stomach.
It is best to drink green tea after or between meals. People with peptic ulcers or acid reflux should not over-drink green tea. A 1984 study concluded that tea is a powerful gastric acid stimulant, which can be reduced by adding milk and sugar.
Sometimes, inappropriate brewing of green tea may also have adverse effects. Green tea is best brewed in water at 160° to 280°F. Overheated water may cause heartburn or upset stomach.
Iron deficiency and anemia
Green tea reduces the absorption of iron in food. Its polyphenols bind to iron, making it difficult for the body to absorb. It was previously believed that green tea blocked the absorption of non-heme iron (iron from animal sources) by approximately 25%. 2 However, recent findings indicate that it hinders the absorption of heme, plant iron.
Add a little lemon to your green tea to check for iron malabsorption.
However, vitamin C will increase the absorption of non-heme iron, so you can squeeze lemon into the tea, or eat other vitamin C-rich foods such as peas, broccoli and tomatoes during meals. If you have anemia such as iron deficiency, the National Cancer Institute recommends drinking tea between meals.
Mild to severe headache
Although green tea is considered a safe drink for migraine sufferers, it may still be out of eating habits for people with chronic daily headaches. Population-based studies have shown that caffeine is a risk factor for chronic daily headache attacks. Although green tea contains much less caffeine than coffee or other teas, it is best for these people to avoid it.
Sleep problems, nervousness and anxiety
Regardless of the amount of caffeine green tea, it is not a bedtime drink. Caffeine itself can block sleep-inducing chemicals in the brain and increase the production of adrenaline. Caffeine has a significant effect on anxiety and sleep, depending on your sensitivity.
Green tea also contains the amino acid L-theanine, which has the ability to calm you down, but also allows you to stay alert, focus, and concentrate better. This is not the same as a good night’s sleep.
Irregular or accelerated heartbeat
The caffeine in green tea may cause irregular heartbeat. It also stimulates the heart muscle to contract at rest.
Because the caffeine in green tea affects the movement of food through the food pipe, the alternating contraction and relaxation of the food pipe muscles may cause nausea.
Caffeine in green tea has a laxative effect. It helps peristalsis (the movement of food through the digestive system). It stimulates the muscles of the colon to contract and then relax, which increases the need to move your intestines.
Muscle tremor and contraction
By regulating calcium channels in cells, caffeine in green tea can cause skeletal muscle contraction.
The caffeine in green tea increases the release of acid in the stomach. This can cause discomfort similar to heartburn.
The caffeine in green tea can reduce blood flow to the brain, causing dizziness and motion sickness.
Caffeine in green tea can aggravate tinnitus or tinnitus.
The caffeine in green tea stimulates the central nervous system. It activates neurons when consumed in excess, causing convulsions.
The caffeine in green tea may increase the risk of bleeding.
The caffeine in green tea may interfere with blood sugar control. If you drink green tea and suffer from diabetes, please monitor your blood sugar carefully.
Drinking green tea will increase the pressure in the eyes. The increase occurred within 30 minutes and lasted for at least 90 minutes.
The caffeine in green tea may increase blood pressure in hypertensive patients. However, this situation does not seem to happen to people who regularly drink green tea or other products that contain caffeine.
Green tea extract supplements have been linked to several liver damages. Green tea extract may worsen liver disease because caffeine in the blood may accumulate and last longer.
Drinking green tea can increase the amount of calcium that is washed out in the urine, which may lead to deterioration of bone health and osteoporosis, especially those who may be susceptible to the same disease due to other factors. Caffeine should be limited to less than 300 mg per day (about 2-3 cups of green tea). Some calcium loss caused by caffeine can be compensated by taking calcium supplements.
Pregnancy and baby health risks
Green tea contains caffeine, catechins and tannins. All three substances are related to pregnancy risk. If you are pregnant or breastfeeding, a small amount of green tea-about 2 cups a day-is safe. This amount of green tea provides about 200 mg of caffeine. However, drinking more than 2 cups of green tea a day is associated with an increased risk of miscarriage and other negative effects.
Caffeine enters breast milk and may affect nursing babies. In addition, large amounts of drinking may cause birth defects of the baby's neural tube.
Children's nutrient absorption problems
The tannins in Gunpowder Tea may hinder children's absorption of nutrients, such as protein and fat. Since green tea contains caffeine, it can also cause excessive stimulation.