Tea Side effects & Health Benefits

Tea side effects

Tea side effects

We at Food Thesis wanted to bring scientific reasons why tea is now an important part of our life, there are a lot of articles which talk about benefits but none discusses the negative impact of tea on the health. In this article, we’ll cover all the scientific aspects, positive effects, and myths.

Tea evolved as a beverage from the medicinal drink in the past 2000 years. A cup of tea is not only the source of health but it’s also a medium to connect socially with other people. Tea always intrigued the scientific community on its widespread usage and deep integration with the culture around the world. While most research is performed in vitro condition (lab conditions) or in vivo using animals models. Very little research has been done on a human being. The physiological effects are mainly because of the compounds viz. polyphenols, caffeine, carbohydrates, vitamins, amino acids, and purine alkaloids. All these compounds are beneficial for health but there is always an appropriate amount.

Tea mainly contains three main compounds(1) Polyphenols, Caffeine and other metals like aluminum Beneficial and harmful effects of these compounds are tabulated as follow

Health Benefits of Polyphenol (Catechin), Epigallocatechin-3-gallate (EGCG)

1. Tea helps in reducing the blood lipid

Green tea or tea helps in the reduction of blood cholesterol and lipid thus strengthens the heart and make the s body more active. therefore drinking tea may help in providing a good healthy heart.

2. Tea also acts as an antimicrobial

Tea secondary metabolites are antimicrobial in its nature. Hence helps in fighting against many microbial diseases. It at least gives a certain amount of relief when consumed.

3. Rich antioxidant activity of tea

Of course, everybody is very familiar with the fact of its antioxidant nature. Tea consumption helps in minimizing the free radical activity of the body thus acts as an antioxidant.

4. Anticancerogenic property of tea

Again tea contains many secondary metabolites which act as a DNA protectant. It helps in controlling the free radicals in the body and unwanted DNA damage.

5. Drinking tea enhances digestion

green tea helps in solving the digestion problem. It is also advisable by some dieticians that drinking jasmine green tea before bed helps in digestion and thus gives a relaxing sleep.

6. Tea helps in weight loss

Secondary metabolite that is catechins helps in burning of extra cholesterol and fat results in weight reduction.

7. Protecting skin damage

The components present in the tea, like EGCG and catechins, are also helped in protecting the skin. These compounds help in breaking the free radicals present in the cell thus protects from cell damage and skin abnormalities.

Side Effects of Polyphenol (Catechin), Epigallocatechin-3-gallate (EGCG)

Green tea and tea are good for health if consumed in a controlled amount. Excess consumption of tea causes many serious side effects especially for people suffering from anemia, heart diseases, and indigestion problems. Following are the 11 main side effects of taking tea in excess
1. Hinders iron bioavailability
2. DNA abnormality due to proper folate function
3. Disturbs RBC formation because of improper folate function
4. Causes Anaemia
5. Intestinal gas
6. Nausea
7. Heartburn
8. Stomach ache
9. Abdominal pain
10. Dizziness
11. Muscle pain

Caffeine Health Benefits & Side Effects

Caffeine is one of the main ingredients of tea which has both a good and bad side effect. Although the normal amount helps in keeping body energetic and stress-free. But the excess amount of caffeine results in insomnia, restlessness and other types of problems. Following are in short are the health benefits and side effects of caffeine

Health Benefits of Caffeine

1. Reduce the risk of Alzheimer’s and dementia
2. Reduce Stroke
3. Reduce Type 2 diabetes
4. Instant energy

Side effects of Caffeine

1. Sleep deprivation
2. Affect the nervous system
3. Restlessness
4. Vomiting
5. Epigastric Pain
6. Tremors
7. Palpitations
8. Headache
9. Diarrhea
10. Tachycardia

Metals ( Arsenic, cobalt, nickel, etc) Side Effects

Side effects: Dental fluorosis; Due to arsenic increased carcinogenic risk.


  1. https://www.tandfonline.com/doi/abs/10.1080/10408398.2012.678949


Please enter your comment!
Please enter your name here