Green Tea Side Effects

In the Western world, green tea is perhaps best known as weight loss aid. Drinking the beverage alone cannot make those pounds go away but it has been shown to increase metabolic rate which in turn burns more calories. But even more important are its health benefits. The scientific studies have shown that it contains powerful antioxidants which are believed to help prevent/treat a large number of health problems and diseases including high blood pressure, high cholesterol, arteriosclerosis, heart disease, stroke, dental cavity, inflammatory bowel disease, liver disease and even some types of cancer. On the other hand, it also contains substances which can cause side effects or interact with medications, supplements and other herbal remedies.

The majority of potential side effects are caused by caffeine but the levels of caffeine in it are much lower than in coffee and other teas derived from Camellia sinensis. For that reason the majority of people do not experience any adverse effects from drinking this variety of tea.

Green tea can cause side effects in people who are sensitive to caffeine. They may experience insomnia, increased heart rate, irritability, nausea, upset stomach, nausea, loss of appetite, increased urination and diarrhea/constipation. People who are allergic to caffeine or tannin may develop skin rash and hives. Caffeine poisoning is rare but precaution is necessary if taking extracts which are highly concentrated.

You are highly recommended to avoid drinking the beverage if being pregnant or breast-feeding. Small amounts are usually harmless but drinking it in large amounts has been associated with several pregnancy complications including spontaneous abortion. Breast-feeding women should avoid it as well because caffeine enters the mother's milk and can cause sleep problems in the baby. Children should not be given the beverage either.

People who have a medical condition should always consult with their doctor before starting to use any herbal remedies. Individuals with stomach conditions such as peptic ulcers, kidney disease, heart problems and psychological disorders (anxiety) are highly advised against using green tea. You should also consult with your doctor before starting to drink it if taking any medications due to potential drug interactions.

Some studies imply that green tea may lower blood sugar levels but the evidence of its benefits for diabetics are inconclusive. Do not start using it without your doctor's approval if suffering from diabetes.