× SuperSmart Learn by health topic New articles Popular articles
Visit our shop My account Smart Prescription Blog Loyalty scheme Language: English
Slimming and weight control Features

Green tea for weight loss: does it really work?

It’s been said that it cleanses and detoxifies the body, burns fat and suppresses the appetite … In short, it’s credited with many benefits, due in particular to its high content of powerful flavonoids called catechins. But can green tea really help you lose weight?
Drink green tea to lose weight
Can green tea really improve your health and figure?
Rédaction Supersmart.
2023-05-30Comments (0)

Green tea: a catechin-rich tea

Consumed for thousands of years, especially in Asia, tea leaves contain numerous active ingredients. The most important are catechins (polyphenols from the flavonoid family, recognised as antioxidants), L-theanine (an amino acid derived from glutamine) and theine (the same molecule as caffeine) (1).

There are, however, a wide variety of teas. What’s more, the way in which the leaves are prepared before preserving has a significant impact on the tea’s ultimate content of active ingredients (2).

Black tea leaves undergo oxidation which promotes a bitter taste, increases the content of theine but reduces that of catechins.

In contrast, green tea is exposed to heat as soon as it has been picked, which prevents oxidation of the leaves. Two methods are used for this: the Chinese method (in which the leaves are heated in a tank) and the Japanese method (in which the leaves are steamed, preserving the tea’s active ingredients even more).

These methods of preparation mean that green tea contains 15%-30% catechins (compared with an average 9% for black tea), of which 50% -75% are epigallocatechin gallate (EGCG), tea’s most potent compound (3).

Matcha, sencha, gyokuro, bancha and genmaicha are all varieties of green tea that contain high catechin levels.

Green tea to slim down the tummy: fact or fiction

Although the various health authorities in Europe do not currently recognise the efficacy of green tea for weight loss, numerous studies have been exploring this question for a number of years.

And their results have been consistent: visceral fat loss was greater in subjects who consumed catechins than in controls (4-6).

Other studies have investigated the moderating effects of caffeine and the role of ethnicity. One study published in the International Journal of Obesity concluded that drinks containing catechins or a mixture of caffeine and epigallocatechin gallate (ECGC) had a mildly positive effect in reducing weight and fat mass (7).

Interestingly, this study revealed that increased caffeine intake reduced the slimming effects of green tea. Ethnicity also seems to play a role, with green tea’s slimming benefits appearing to be more marked among Asian populations, though this needs further investigation.

However, it appears that the benefits of green tea alone are not enough to produce weight loss or reduce abdominal fat effectively; other measures are needed.

Losing weight from the stomach and elsewhere: some advice

A key factor in losing weight, especially slimming down the tummy, is achieving the right calorie balance. Based on your basal metabolic rate and activity level, you need to work out the amount of calories you consume each day (check out our article How many calories should you eat and burn each day?).

To lose weight, you need to consume fewer calories than you burn; it’s as simple as that.

There are, however, a few measures that can help with this:

Green tea for weight loss: objective view

With its diuretic and draining effects, green tea offers some efficacy in aiding weight loss and supporting health. Drinking a lot helps to eliminate toxins from the body, hence green tea’s detox reputation – and all without consuming too much caffeine.

In addition, by filling up the stomach, green tea curbs hunger and thus helps to reduce the amount of food consumed.

Drinking green tea with lemon is an excellent choice as the lemon juice helps acidify the pH of the drink. This improves the body’s acid-base balance, which is great for the metabolism, and therefore, weight loss.

Nevertheless, it’s unrealistic to rely on green tea for rapid weight loss: no ‘quick fix’ approach to losing weight i effective over the long-term. Successful slimming requires a gentler, more measured approach.

What time of day should you drink green tea for the best slimming benefits?

Anytime! But ideally, before meals (breakfast, lunch and dinner) or when you’re feeling a bit peckish. Drinking green tea before a meal helps to reduce your appetite (by curbing hunger) and enables you to properly digest all the drink’s micronutrients.

How much tea should you drink a day for weight loss?

As much as you want! 3 to 5 cups of green tea a day would seem to be a good basis for aiding weight loss through adequate hydration.

Green tea-based supplements

While it’s perfectly possible to drink green tea throughout the day, you can also take advantage of dietary supplements that contain green tea’s active ingredients in order to obtain their benefits at higher doses:


Natural Rapalogs SupplementNatural Rapalogs

Natural, effective inhibitors of mTOR

55.00 €Add to basket
5 2 reviews
Sunphenon® EGCg SupplementSunphenon® EGCg

Extract of green tea (Camellia sinensis) standardised to 95 % epigallocatechin- gallate All the power of green tea - naturally!

41.00 €Add to basket
5 7 reviews
AntiOxidant Synergy SupplementAntiOxidant Synergy

Powerful, multi-action antioxidant defence

49.00 €Add to basket
5 12 reviews
Suntheanine® dietary supplementSuntheanine®

Pharmaceutical, scientifically supported form of L-Theanine

25.00 €Add to basket
5 9 reviews
Metadrine ™ dietary supplementMetadrine™

Advanced thermogenic formulation, improved and strengthened

63.00 €Add to basket
5 4 reviews


  1. SHEN, Fwu-Ming et CHEN, Hong-Wen. Element composition of tea leaves and tea infusions and its impact on health. Bulletin of environmental contamination and toxicology, 2008, vol. 80, p. 300-304.
  2. TESHOME, Kidist. Effect of tea processing methods on biochemical composition and sensory quality of black tea (Camellia sinensis (L.) O. Kuntze): A review. Journal of Horticulture and Forestry, 2019, vol. 11, no 6, p. 84-95.
  3. GRAHAM, Harold N. Green tea composition, consumption, and polyphenol chemistry. Preventive medicine, 1992, vol. 21, no 3, p. 334-350.
  4. KOVACS, Eva MR, LEJEUNE, Manuela PGM, NIJS, Ilse, et al.Effects of green tea on weight maintenance after body-weight loss. British Journal of Nutrition, 2004, vol. 91, no 3, p. 431-437.
  5. JURGENS, Tannis M., WHELAN, Anne Marie, KILLIAN, Lara, et al.Green tea for weight loss and weight maintenance in overweight or obese adults. Cochrane database of systematic reviews, 2012, no 12.
  6. DIEPVENS, K., KOVACS, E. M. R., VOGELS, N., et al.Metabolic effects of green tea and of phases of weight loss. Physiology & behavior, 2006, vol. 87, no 1, p. 185-191.
  7. HURSEL, Rick, VIECHTBAUER, Wolfgang, et WESTERTERP-PLANTENGA, Margriet S. The effects of green tea on weight loss and weight maintenance: a meta-analysis. International journal of obesity, 2009, vol. 33, no 9, p. 956-961.


You must be connected to your account to leave a comment
Be the first to review this article
Our selection of articles
Ketogenic diet with meat, fish, eggs, avocados and the word keto
Why start a ketogenic, or keto, diet?

The keto diet, high in fat, produces rapid weight loss. Here’s a quick rundown of what you need to know before launching into a diet of this kind.

Woman taking exercise to lose weight and slim down
What is lipolysis?

Lipolysis is the body’s mechanism for breaking down fats to make them absorbable and usable. There are two types: gastrointestinal lipolysis, which takes place during digestion, and adipocyte lipolysis, concerned with stored fat, which is often referred to as ‘fat-burning’. How can you use it to help achieve your slimming goals?

Woman who has taken a natural appetite-suppressant
What is the most effective natural appetite-suppressant?

Prone to cravings? Unable to control your sweet tooth? Discover the best natural appetite-suppressants for effortlessly curbing your hunger pangs.

Dark, white and milk chocolate
What’s the best type of chocolate for your health?

Milk, dark, white, fruity or spiced chocolate … What are the pros and cons of chocolate in terms of our health? Which type should you choose and which should you avoid?

Fat cells (adipocytes) under the microscope
That’s what happens to your fat cells when you put on weight

If you’re overweight or have developed a paunch, you’re probably suffering from chronic inflammation of your adipose tissue. This is a silent pathological process which sooner or later will become a ticking time bomb, so it makes sense to read up on the latest findings and take action fast.

Ultra-processed foods
What are processed foods? How can they be replaced?

There are more processed foods in our cupboards and fridges than you might think. Learn how to recognise them and replace them with healthier options.

Products which must be of interest

© 1997-2023 Supersmart.com® - All rights reserved
© 1997-2023 Supersmart.com®
All rights reserved


Thank you for visiting our site. Before you go

Club SuperSmart
And take advantage
of exclusive benefits:
Continue shopping
We use cookies (first-party and third party) to give you the best online experience.
Learn more about cookies and manage my preferences
I accept cookiesx