Side effects of Twinings pure green tea are generally related to its caffeine and tannin content, and can include stomach upset (especially on an empty stomach), headaches, insomnia, or jitteriness; large amounts might affect iron absorption or liver health (more common with extracts), while pregnancy and certain medications require caution due to caffeine and potential interactions. Most issues stem from overconsumption (over 8 cups/day) or individual sensitivity, not the brand itself.
Side effects of green tea extract supplements include nausea, constipation, abdominal discomfort, and increased blood pressure. Although uncommon, liver injury has been reported in some people who used green tea products, primarily green tea extracts in tablet or capsule form.
Green tea: Green teas (including the popular matcha tea) are considered safe to drink during pregnancy. Just watch the caffeine and limit yourself to fewer than three cups a day. Green tea is high in catechins, substances which can prevent your cells from fully absorbing folic acid.
Green tea supplements and high consumption of green tea can lead to liver damage and disease (12). Experts believe this is due to a build-up of caffeine that can stress the liver. To avoid this side effect, avoid consuming more than 4 to 5 cups of green tea every day.
Drinking green tea is linked to a reduced risk of clogged arteries. The link seems to be stronger in males than in females. Also, people who drink at least three cups of green tea daily might have a lower risk of death from heart disease. Cancer of the lining of the uterus (endometrial cancer).
It is very relaxing. Drinking a cup of green tea in the morning 1-2 hours after breakfast or in the afternoon 1 to 2 hours after lunch is the optimal time to drink green tea to boost your antioxidant dose. Antioxidants surround and neutralize free radicals preventing them from causing damage and cancer development.
Takeaways. Green tea is low in calories and rich in plant compounds called antioxidants. Drinking a few cups a day may support heart, brain, and blood sugar health. It has less caffeine than coffee or black tea.
Reasons to Avoid Overconsumption of Tea
Antioxidants help decrease inflammation in the body, which can be helpful for your kidneys. Green tea has also been shown to decrease the risk of kidney stones. In particular, green tea contains the catechin epigallocatechin-3-gallate (EGCG), which may be helpful for people with kidney disease.
Meta-analysis showed that green tea consumption caused a significant reduction in systolic blood pressure and total and LDL cholesterol. The effects on diastolic blood pressure, HDL cholesterol, and triglycerides were not significant.
How Much Caffeine Is in a Cup of Green Tea? In contrast, an 8-ounce cup of green tea usually provides 20 to 45 mg of caffeine. This lower caffeine content makes green tea an excellent option for those who are more sensitive to caffeine or who want a gentler lift later in the day.
Green tea contains something called catechins, which have been shown to partially prevent the cells in the intestines from absorbing folic acid. Studies have shown that when women are drinking a lot of green tea, they have lower levels of folate in their system.
Teas to avoid during pregnancy
Twinings Green Tea Bags - Caffeinated Tea Made from Fresh Green Tea Leaves, Perfect for Hot or Iced Tea, 50 Count.
Why does green tea prevent sleep? Yes, because of the presence of theine/caffeine, which can interfere with sleep. Although it was thought for a while that this was not the case, theine and caffeine are the same molecule.
Twinings green tea contains around 30-40mg of caffeine per cup, based on 200ml of water being used. As with any tea, there are so many differences in how and where it is grown, how it's treated and even how it's brewed, it's difficult to give an exact number.
Key Takeaways. Drinking green tea daily might improve heart health by lowering cholesterol and reducing the risk of heart disease. Green tea can enhance brain health by improving mood, reaction time, and memory.
Signs of kidney problems often include fatigue, swelling (especially in legs, ankles, and around eyes), changes in urination (like foamy urine or needing to go at night), loss of appetite, nausea, itchy skin, and shortness of breath, though early stages can be silent, so monitoring urine appearance, blood pressure, and unusual tiredness is key as impaired kidney function allows toxin buildup and fluid retention.
Recent studies have shown that green tea has a certain degree of both preventive and therapeutic effects on liver disease. Studies have shown that green tea can help in the regulation of lipid metabolism, which reduces the accumulation of lipids in the liver.
Massive black tea consumption has been linked to kidney failure due to its high oxalate content (acute oxalate nephropathy).
“Green tea wins as the most healthy tea,” says Ashley Simper, the manager of dietetic services with OSF HealthCare “Drinking green tea, at least three or more cups a day, leads to health benefits when it comes to cardiovascular disease, cancer and the overall risk of mortality.”
- Never have green tea on an empty stomach: Beginning the day with a dose of caffeine may kick-start your day with the much-required impetus, it can also adversely affect the stomach balance. Instead, drink a glass of warm water with lime and honey or simply opt for a fruit.
The polyphenols in green tea join other disease-fighting chemicals, including compounds called catechins. Catechins help protect against cancer, heart disease and autoimmune diseases by combatting inflammation.
Some research suggests that herbal teas such as green tea may help treat clogged arteries. However, a person may need to make other dietary and lifestyle changes, as well as taking other preventive steps to prevent further plaque buildup.
Conclusion: In healthy individuals, green tea supplementation reduced systolic blood pressure by 2.99 mmHg and diastolic blood pressure by 0.95 mmHg. Our study allowed us to clearly evaluate the effect of green tea as it included healthy individuals and contributed to the literature.