Can green tea (Camellia sinensis) help reduce belly fat? ,How do its antioxidants, particularly catechins like EGCG, work in weight management? Here is a complete explanation of how to prepare it and its main health benefits.
Green tea (Camellia sinensis) is a natural drink that is widely consumed around the world. Recent scientific studies show that it may help with weight management and may also help reduce belly fat (abdominal fat) to some extent. However, its effects are more meaningful when combined with a healthy lifestyle, a balanced diet, and regular exercise. The main benefits of green tea come from its natural bioactive compounds. It mainly contains catechins, especially epigallocatechin gallate (EGCG), along with small amounts of caffeine and antioxidants. These may help increase fat oxidation and energy expenditure in the body.
Green tea is not a direct solution for reducing belly fat. However, some studies suggest that when combined with exercise, it may slightly improve the process of reducing abdominal fat. It may especially affect body fat changes, namely triglyceride reduction, and the improvement of metabolism. Making green tea is easy. You can steep fresh green tea leaves or tea bags in hot but not boiling water for 2–5 minutes and drink it. Using it without sugar or extra additives helps preserve its natural benefits. In addition, green tea has many important benefits. It has antioxidant, anti-inflammatory, and heart health–improving properties. Some studies suggest that it may support weight control, fat metabolism, and overall health. Green tea may act as a supportive health beverage. However, to get better results in reducing belly fat, a balanced diet, exercise, and a healthy lifestyle are necessary.
This article explores the following topics based on scientific evidence.
1. What are the components in green tea?
2. How does green tea help in reducing belly fat?
3. How can green tea be prepared?
4. What are the other important benefits of green tea?
What are the components in green tea?
• natural antioxidants (polyphenols/catechins),
• amino acids (like L-theanine),
• alkaloids (caffeine),
• chlorophyll,
• vitamins,
• trace minerals
How does green tea help reduce belly fat?
Although this is a complex question, the Scienceora team explains it very precisely based on scientific evidence. It does not directly reduce belly fat. However, some of its bioactive compounds may help reduce abdominal fat by improving the body’s fat metabolism. For example, the following points can be briefly noted.
1. Catechins may increase fat burning
2. May improve metabolism
3. May reduce fat absorption
4. May help control blood sugar levels
Let’s look at what recent research says about this topic.
A study published on February 17, 2021 states the following.
“Green tea catechins (GTC) may help improve the metabolic profile. However, more detailed studies are needed to clearly determine what dosage of GTC is most effective.” (Source: PMC) Based on this study, the relationship between green tea and belly fat can be summarized as follows.
- The catechins in green tea (GTC) may help improve the body’s fat metabolism.
- They may help increase the resting metabolic rate (RMR), which is the amount of energy the body uses while at rest.
- They may help increase the body’s total energy expenditure (EE).
- They may help promote the fat oxidation process.
- These changes may contribute to weight loss.
- Green tea catechins (GTC) may help improve the metabolic profile.
Another study from 2021 on the beneficial effects of major polyphenols found in green tea, coffee, wine, and curry spices on obesity states the following.
This review provides a state-of-the-art update on green tea, coffee, wine, and curry, and their major polyphenol compounds. They are also considered to have the potential to help prevent obesity.
Based on this research, the relationship between green tea and belly fat can be summarized as follows.
- Many studies (epidemiological studies and clinical trials) suggest that foods such as green tea may provide health benefits.
- They may help reduce the risk of obesity, cancer, and diabetes.
- Polyphenols in them may play an important role in these benefits.
- In particular, green tea is considered to play a role in preventing obesity (anti-obesity effects).
A study conducted in 2022 states the following.
In women, fat oxidation during exercise varies depending on the phases of the menstrual cycle. This study aims to investigate the effect of green tea extract (GTE) intake on fat oxidation during exercise across different phases of the menstrual cycle. These results suggest that green tea extract (GTE) intake may help improve the reduction in fat oxidation that occurs during the luteal phase (LP) of the menstrual cycle.
The main conclusions of this study are as follows:
- In women, fat oxidation during exercise may vary depending on the phases of the menstrual cycle.
- Green tea extract (GTE) intake may help improve the reduced fat oxidation observed during the luteal phase (LP) of the menstrual cycle.
A study published on June 19, 2018, found that matcha green tea drinks increase fat oxidation in females during brisk walking. The study reported the following findings.
- EGCG (Epigallocatechin Gallate) and caffeine in green tea may help increase fat burning during exercise.
- Drinking matcha green tea may improve fat burning during exercise in women.
- Matcha green tea contains both EGCG and caffeine.
However, the study states that the metabolic benefits of matcha should not be overstated in situations where people only do 30 minutes of brisk walking for weight loss.
A study published on September 30, 2024, reported the following findings.
According to current evidence, the extra benefit of green tea may be very small compared to the weight loss achieved through exercise. However, it is not clear that adding green tea to exercise training provides extra benefits for the lipid profile. Therefore, more detailed studies are needed in the future to draw firm conclusions in this area.
A study published on November 30, 2023, examined the effects of green tea extract (GTE) supplementation on body composition, obesity-related hormones, and oxidative stress markers. The study reported the following findings. A GRADE-assessed systematic review and dose–response meta-analysis of randomized controlled trials reported the following findings.
According to research, green tea extract (GTE) intake may provide benefits for several diseases, especially some types of cancer, cardiovascular diseases (CVD), and liver diseases. However, the evidence on its effects on body composition, oxidative stress, and obesity-related hormones is still inconclusive. These results suggest that GTE intake may help reduce oxidative stress, body mass, BMI, and body fat percentage. It is also reported that it may act as a nutraceutical supplement and may increase total antioxidant capacity (TAC) and adiponectin levels.
A study published in April 2022 examined how a single intake of green tea affects energy expenditure, appetite, and food intake. A randomized crossover trial reported the following findings.
In healthy individuals, green tea increased energy expenditure and also affected subjective feelings related to hunger. This study was registered on the Brazilian Clinical Trials Registry (ReBEC) under the identifier RBR-928HCW.
Final conclusion drawn from the study:
- In healthy individuals, green tea may increase energy expenditure.
- It was also observed that it affected subjective responses related to hunger.
A study published on December 7, 2022, found that 60 days of green tea extract supplementation in overweight, post-menopausal, and class I obese women may help counteract dysfunction in adipose tissue. The following study reports the related findings.
After menopause, weight gain in women is common, and an increase in visceral fat, especially around the abdominal area, is often observed. This type of fat acts as an endocrine organ that releases pro-inflammatory adipocytokines, which can trigger inflammation in the body. As a result, the risk of metabolic disorders increases. These results suggest that 60 days of green tea extract supplementation may help counteract adipose tissue dysfunction in overweight and class I obese post-menopausal women.
A study published on April 11, 2023, examined the combined effects of green tea catechins and citrus β-cryptoxanthin in obese rats. The animal study reported anti-obesity and anti-inflammatory synergistic benefits as follows.
Chronic obesity leads to various diseases, so there is an urgent need to prevent and treat it. In this study, obesity was induced in rats using monosodium glutamate (MSG), and the synergistic anti-obesity effects of tea catechins and the antioxidant β-cryptoxanthin found in mandarin oranges were investigated.
According to the study results, obese rats that consumed tea catechins and β-cryptoxanthin together for 4 weeks showed a significant reduction in body weight. Furthermore, their body weight was reduced to a level that was not significantly different from that of the control group rats. This study suggests that consuming tea catechins together with antioxidant-rich foods may help reduce chronic obesity. Therefore, researchers suggest that the combined action of different bioactive compounds in foods may play an important role in reducing obesity.
Note: This study was conducted in mice; therefore, further human clinical trials are needed to confirm whether the same effects occur in humans.
A study published on May 5, 2020, examined the effects of green tea supplementation on obesity. A systematic review of randomized controlled trials and a dose–response meta-analysis reported the following findings.
The effects of green tea (GT) in individuals with obesity have been evaluated in several studies. However, the results of the studies have been inconsistent, so no clear consensus has been reached so far. These differences are mainly attributed to factors such as dosage, type of extract used, and duration of the intervention.
The results of this meta-analysis support that green tea may help improve obesity-related measures. Therefore, researchers suggest that green tea may be used alongside a balanced healthy diet and regular physical exercise in the management of obesity.
Note: This study does not claim that green tea alone is a complete solution for obesity. Instead, it suggests that it may be an adjunct strategy that can provide additional benefits when used alongside a healthy diet and regular exercise.
A study conducted in 2021 on exercise and green tea reported the following findings. An overview study reported the following findings on how reducing the formation of reactive oxygen species (ROS) may help improve sports performance.
Green tea is widely recommended for preventing various diseases, maintaining health, and managing body weight. Its benefits are mainly due to the catechins and polyphenols it contains. In particular, (–)-epigallocatechin-3-gallate (EGCG) has been identified in medical and animal studies as having strong antioxidant and anti-inflammatory properties.
A study published on February 22, 2025, titled “Green Tea: Current Scientific Understanding and Challenges in Use” reported the following findings.
Green tea has many biological activities, including antioxidant, anti-inflammatory, anticancer, and antimicrobial effects. It may help reduce body weight and slow down the aging process. Over the past several years, many efforts have been made to improve catechin intake and increase its benefits in humans. However, at present, the use of catechins for disease prevention or treatment is still limited. Therefore, more research is needed to better understand the safe and effective use of catechins in the future.
A study published on December 12, 2012, on the use of green tea for weight loss and weight maintenance in overweight or obese adults reported the following.
In overweight or obese adults, green tea products may cause a small amount of weight loss, but the result was not statistically significant. Also, the amount of weight loss was very small, so it is unlikely to have a clinically important effect. Likewise, there is no strong evidence that green tea helps maintain weight after weight loss. In studies that reported adverse events, only two cases were found to have severe side effects that required hospital admission. The remaining side effects were generally mild to moderate.
A study published on December 11, 2008 found that green tea catechins increase exercise-induced abdominal fat loss in overweight and obese adults. A study on this topic reported the following.
This study evaluates the effects of a green tea catechin drink on body composition and fat distribution in overweight and obese adults who exercise for weight loss. These results suggest that taking green tea catechins may increase exercise-related abdominal fat loss and reduce blood triglycerides.
How to prepare green tea
Refreshing and healthy green tea — can be easily made at home!
Ingredients
- 200 milliliters of water
- 1 teaspoon of green tea leaves or 1 tea bag
- 1 teaspoon of honey (optional)
- 0.5 teaspoon of lemon juice (optional)
Steps 1
Heating water: Heat 200 milliliters of water to about 80°C, without letting it boil. Turn off the stove before the water starts boiling Because, this is very important! If you use boiling water, the tea will taste bitter.
Steps 2
Adding tea: Put 1 teaspoon of green tea leaves or 1 tea bag into the hot water in a cup. You can add the tea leaves and then pour in the hot water, or you can put the tea bag directly in the cup and pour hot water over it.
Steps 3
Steeping: Let it soak for only 2 to 3 minutes. If you leave it too long, the tea will taste bitter. Remove the tea bag gently.
Steps 4
Adding flavor: If you want, you can add 1 teaspoon of honey and 0.5 teaspoon of lemon juice. Avoid adding sugar but, honey is a better option.
Steps 5
Drinking: Fresh green tea is ready! Drink it slowly while it is warm. Avoid drinking it on an empty stomach in the morning.
Making green tea is very easy! In the recipe above, each step has a timer. You can use it to prepare it at the right time.
Types of Green Tea
- Jasmine Green Tea — has a very pleasant floral smell.
- Matcha — green tea in powdered form, rich in nutrients.
- Honey Lemon Green Tea — good for cold and cough.
What are the other important benefits of green tea?
• May help you live a longer life
• May help prevent heart disease
• May help manage blood sugar levels
• May support oral (mouth and teeth) health
• May protect the brain from aging
• May help reduce the risk of some cancers
• May improve brain function and thinking ability
FAQ's
01. Does green tea really reduce belly fat?
The catechins and caffeine in green tea may slightly help increase the body’s fat-burning process. However, it cannot be said for sure that drinking only green tea will significantly reduce belly fat. It may give better benefits when combined with a healthy diet and regular exercise.
02. Which compound in green tea plays the main role in reducing belly fat?
Epigallocatechin gallate (EGCG), a catechin found in green tea, is considered the main active compound. It may support fat metabolism.
03. How many cups of green tea can be consumed per day?
Generally, 2–4 cups of green tea per day is considered a safe amount. However, this may vary depending on a person’s health condition and caffeine tolerance.
04. How long does it take for belly fat to start reducing if you drink green tea?
There is no fixed time for this. Diet, exercise, sleep, and lifestyle factors determine the results. Green tea alone does not cause quick changes.
05. Does combining green tea with exercise give extra benefits?
Yes. Some studies show that green tea catechins combined with regular exercise may help reduce belly fat.
06. If sugar is added to green tea, do its benefits decrease?
Adding too much sugar adds extra calories. So, if the goal is to reduce belly fat, it is better to drink it without sugar or with very little sugar.
07. Is green tea suitable for everyone?
Not necessarily. People who are sensitive to caffeine, pregnant women, or those taking certain medicines should get medical advice.
08. Does drinking green tea completely reduce body weight?
Green tea may help with weight management to a small extent. However, it is not a miracle drink that significantly reduces body weight on its own.
09. What is the best time to drink green tea?
It is generally suitable to drink in the morning or during the daytime. Drinking it at night may affect sleep in some people due to caffeine.
10.What is more important than green tea for reducing belly fat?
A balanced diet with calorie control, regular exercise, enough sleep, and stress management are the most important factors for reducing belly fat. Green tea should be considered only as a supporting factor.
11. Can we drink green tea on an empty stomach in the morning?
Generally, it is not suitable for everyone to drink green tea on an empty stomach in the morning. For most healthy people, drinking it in moderation is not harmful. But it is better for the stomach to drink it after a light snack, and it is also better for nutrient absorption in the body.
Takeaways
Green tea is not an instant solution for reducing belly fat.
However, the catechins in it, especially EGCG, and caffeine may slightly help increase fat oxidation and metabolism in the body.
In particular, when combined with exercise and a balanced diet, it may provide a small additional benefit in reducing belly fat.
In addition, green tea also has properties that support antioxidant, anti-inflammatory, and heart health benefits.
However, for long-term and effective weight management, healthy eating habits and regular exercise are the most important.
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