10 Side Effects of Oolong Tea You May Not Know

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Oolong tea, also called Black Dragon Brown Tea, originated in China from about a millennium ago. It has dark yellow color, light sweet taste when being infused. This type of tea is well-known for being good for health such as weight management, removal of harmful free radicals, anti-cancer properties.

However, it also contains some bad effects if you drink too much or drink in a wrong way. If you consider oolong tea an indispensable drink or even addicted to this type of drink, think about my 7 side effects of below.

#1. Making sleeplessness


Credit: https://pm.advil.com/tips-resources/causes-sleepl​essness

To everyone, sleep is an important part of  having a healthy life, but do you know that this type of sweet tea leads to the insomnia?

The main cause of sleeplessness from oolong tea is the amount of caffeine contained in the tea. In fact, the amount of caffeine in teas makes up 43% total caffeine amount consumed. Therefore, even in oolong tea is only 5-7% caffeine but this is also a huge source of caffeine in types of  beverage.

Insomnia is the result of this caffeine. Although sometimes you might need caffeine to help keep your spirits up, in the evening it will affect your sleep: making it harder to fall asleep and blocking the deep sleep you may have. It is known that oolong tea is low in caffeine compared to other teas like green and black, but don’t drink more than 2 cups of oolong tea per day.

#2. Causing restlessness

This is also caused by the amount of caffeine in oolong tea.


Credit: https://www.caffeineinformer.com

For breast-feeding women:

A small amount of caffeine is released into breast milk if the mother drinks much oolong tea. Therefore, breastfeeding women should limit caffeine intake.

So, should they drink oolong tea every day?

In fact, if the mother only drinks 1-2 cups of oolong tea per day, there are no negative effects on the baby.

#5. Bad effects on little kids

Children, who are in physical development age, should not drink too much oolong tea because it will cause calcium deficiency, insomnia, unstable psychology and adversely affect the digestive system of the baby.
Although oolong tea is a natural product, if kids drink a lot, their body will accumulate caffeine significantly, which causes anorexia and psychological instability in children.

Children are likely to a fan of sweet flavor, which contained in oolong tea. However, if they drink oolong tea when they’re hungry, they can have a stomachache or "drunk tea", which means the feeling of qualmishness after drinking tea.

#6. Causing frequent urination

It’s not good for everyone if they have to pee many times a day. Frequent urination is not only inconvenient for daily activities, but also makes the kidney to excrete much. This causes the body to dehydrate, makes you feel tired and bad effects on other body parts such as skin.

So, don’t drink oolong tea before sleeping

#7. Causing arrhythmia

This means there’s a change in the heart beat: The heart might beat more than 100 times per minute, giving you a feeling of palpitations, vibration in your throat or neck. These are symptoms causing by caffeine in the amount of oolong tea intake.

When consuming large amounts of caffeine at the same time, you can get an immediate heartbeat. Some research indicated that the state of the person decides the frequency and level of heartbeat. Some people also experience constant palpitations throughout the day, increasing the risk of serious arrhythmias such as atrial fibrillation, ventricular fibrillation, etc.

In order to avoid this condition, you should use a moderate amount caffeine at the same time by diluting 5 to 10 times, which means you should pour more water when making tea.

#8. Reducing the of thiamine, or vitamin B

Vitamin B is good for memory, which helps the metabolism of sugar into energy in the body faster. Oolong tea lessens the action of vitamin B on the body means that it is harmful to memory as well as the brain.
Therefore, don’t drink oolong tea if you want to absorbs nutrients from foods that are rich in Vitamin B.

#9. Weakening bones or osteoporosis

Oolong tea reduces the body's osmotic calcium levels, which is essential for bone growth. Therefore it weakens the bones gradually. If you have osteoporosis, don’t drink more than 3 cups of oolong tea per day.

#10. Leading to glaucoma:

The pressure inside the eye easily increased by the caffeine contained in oolong tea. This may occur from 30 to 90 minutes, which makes your eyes stressful and work ineffectively.


Nowadays, there are many kinds of tea for you to choose from, you can drink any kind of beverage you like but make sure that your tea is quality assured because only oolong tea which carefully produced ensures its tastiness. Moreover, you should also be careful about how to make your tea to get a good cup of tea.

However, don’t be worry about the side effects of oolong tea. Just drink it in the right way, you will have a good health.

Lastly, thank you for reading my list of 10 side effects of oolong tea. I hope it will be useful for you. Wish you have a nice day!


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3 thoughts on “10 Side Effects of Oolong Tea You May Not Know”

  1. I drink this tea twice a day. I like the taste of it with honey. Since I have been drinking this tea, my skin cleared it and my itching stopped (eczema). My facial wrinkles are disappearing, I have more energy and my blood sugar is going down. GREAT TEA.

  2. I drink this tea twice a day. I like the taste of it with honey. Since I have been drinking this tea, my skin cleared it and my itching stopped (eczema). My facial wrinkles are disappearing, I have more energy and my blood sugar is going down. GREAT TEA.


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