Although there are no serious health concerns related to drinking Oolong tea, some people have reported a few different side effects. Many of these negative side effects of Oolong tea are related to caffeine issues and intolerance. This is somewhat ironic since the caffeine in Oolong tea is also said to help promote weight loss as well.
Oolong tea side effects are not serious enough to cause illness or death, and it would take a large amount of Oolong tea drinking to show serious cases of the negative side effects. However, there are some minor side effects of Oolong tea to keep in mind for specific reasons.
Some side effects of Oolong tea include:
Hypokalemia – This is one of the most common side effects of Oolong tea, especially if it is consumed in large quantities. Hypokalemia is a disorder related to low potassium levels in the body. Caffeine ill interfere with potassium absorption, which can eventually lead to Hypokalemia.
Diarrhea and upset stomach – Caffeine and tannin present in Oolong tea may support excess acid build up in the stomach and cause heartburn. Those who have caffeine allergies may also get diarrhea if even a small amount of Oolong tea is consumed. Some tea drinkers have reported that Oolong tea has sparked irritable bowel syndrome (IBS).
Caffeine withdrawals – People who crave caffeine may experience caffeine withdrawals when switching to Oolong tea. Although Oolong tea does contain caffeine, it does not contain as much caffeine as a cup of coffee. These withdrawals may include headache or migraine, upset stomach and irritability.
Kidney damage – Oolong tea contains oxalates, which are organic acids. Oxalates are known to cause kidney damage when consumed in very high amounts. Oolong tea side effects may also cause frequent urination.
Interference of medications – Some contents in Oolong tea are said to interfere with certain medications. This means that these medications or prescriptions may not be as beneficial as they are supposed to be. The most common substance that interferes with medications is caffeine.
Anxiety – People with anxiety disorders should not consume excess amount of Oolong tea because of the caffeine content. Caffeine may worsen symptoms of anxiety such as restlessness, irritability, loss of appetite and tremors.
Blood disorders – Although it is uncommon, some research has shown that caffeine may slow clotting in the blood. Those with blood disorders are discouraged from consuming beverages with high caffeine content.
Heart conditions – People with irregular heartbeats or palpitations should not drink Oolong tea in large amounts because the caffeine may cause heartbeat irregularities to worsen.
Pregnancy – Caffeine needs to be drank at a minimum when you are pregnant. It is recommended not to go over 300mg of caffeine a day while pregnant or lactating. Oolong tea contains about 200mg of caffeine per 2 cups. Too much caffeine while you are pregnant may cause premature delivery and low birth weight.