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Which tea has the most caffeine?

Amounts of caffeine vary between teas, with black tea being the one that contains the most. Green and white teas contain the least, with the exception of decaffeinated teas.

Tea is one of the most popular beverages in the world. It is made from the leaves of the Camellia sinensis plant, which begin to wither and oxidize after harvest. The oxidation process can be stopped by heating the leaves.

The more the tea leaves oxidize, the darker they become, which determines the type of tea:

Black tea leaves are withered, rolled and completely oxidized.
Green tea leaves do not become wilted and oxidized.
Oolong tea leaves are wilted and partially oxidized.
White tea consists of young leaves that are very little oxidized.

Black tea is most popular in Europe and accounts for around 75% of global tea consumption. Green tea is the most popular in Japan and China. Oolong tea and white tea are less consumed around the world.

The caffeine content of a tea varies depending on the type of tea. The most caffeinated teas are black and oolong teas, decaffeinated teas, and herbal teas, which contain very little or trace amounts of caffeine.

Many teas offer various health benefits because they contain:

Antioxidants: They delay or prevent oxidative damage, which helps reduce the risk of diseases like heart disease and cancer.

Phytochemicals: These phytochemicals occur naturally. They can boost the immune system and play a role in reducing the risk of cancer and heart disease.

Flavonoids: These are a type of polyphenolic phytochemical and are also antioxidants.

Flavonols: These are a type of flavonoids found in tea and are powerful antioxidants.

Epigallocatechin gallate (EGCG): This is a catechin found in black and green tea and is a powerful antioxidant.

Theanine: This is an amino acid that may help reduce stress.

Black tea

Black tea contains the highest amount of caffeine, between 64 and 112 milligrams (mg) per 200g serving.

Black tea contains no calories, fat, protein, fiber, vitamins or sugar. Like other teas, however, it contains flavonoids, phytochemicals, flavonols, theanine, and health-promoting antioxidant properties. Black tea can help:

Increase Mental Alertness: A person can feel more alert and alert by drinking black tea throughout the day due to its caffeine content.

Heart attack: People who drink black tea may have a lower risk of heart attack, while those who have drunk black tea for at least a year may be less likely to die of a heart attack.

Low blood pressure: Caffeinated beverages may contribute to high blood pressure in older people who have low blood pressure after eating.

Ovarian Cancer: People who drink tea regularly seem to have a lower risk of developing this type of cancer than those who never or rarely drink it.

Oolong tea

Oolong tea contains between 29 and 53 mg of caffeine per 2.5 liter serving.

It contains no fats, sugars, proteins or fiber. Per 100 grams (g) oolong tea has:

1 calorie
1 mg calcium
1 mg magnesium
1 mg phosphorus
12 mg potassium K
3 mg sodium
0.01 mg zinc
0.06 mg niacin
2 mg theobromine

Oolong tea can help with weight loss. Animal studies suggest that regular consumption of oolong tea and other types of tea can help with weight loss thanks to the antioxidant EGCG it contains. It may also help fight heart disease, as research shows that oolong tea can lower cholesterol, which may reduce the risk of heart disease.

Green tea

The caffeine in green tea ranges from 24 to 39 mg per 200 g serving.

Per 100g green tea contains no fats, sugars or fiber and contains:

1 calorie
0.22 grams of protein
0.02 mg iron
1 mg magnesium
8 mg potassium K
1 mg sodium
0.01 mg zinc

Green tea may have health benefits including

Anticarcinogenic Properties for Skin Cancer: Human, in vivo, and in vitro research has found that green tea may aid in the chemoprevention of UVB-induced skin cancer. This could be due to tea polyphenols, micronutrients found in plants.

Inflammatory skin conditions: Studies have found that green tea and the EGCG it contains appear to help reduce inflammation.

Cognitive Skills: Observational studies suggest a link between green tea and a reduced risk of cognitive impairment.

White tea

The caffeine in white tea ranges from 32 to 37mg per 200g serving:

Nutritionally similar to green tea, white tea is less processed than black tea, oolong tea, and green tea, meaning it contains more antioxidants. It shares many of the same benefits as these other teas and may also help:

heart health
Protection from the effects of harmful UV rays
reducing inflammation
weight loss
improve cognitive skills

Decaffeinated Teas

These teas contain less than 12 mg of caffeine per 8-ounce serving, and many natural caffeine-free herbal teas contain no trace of caffeine.

The Best Healthy Decaffeinated Teas

Many teas contain no trace of caffeine. You can usually find a decaffeinated version of your favorite black, green, or white tea, including Earl Gray tea, but many herbal teas are naturally caffeine-free. Some decaffeinated teas with notable health benefits are as follows.

rooibos tea

This tea does not contain caffeine. Animal studies suggest that rooibos supplements may help protect the liver from oxidative stress and lower blood pressure.

hibiscus tea

Research suggests that hibiscus leaf extracts offer antitumor and antioxidant properties and may support cardiovascular health and healthy blood pressure.

Camomile tea

Chamomile tea may help improve sleep in people with insomnia. It may also lower cholesterol, improve cardiovascular health and provide antioxidant protection.

turmeric tea

Curcumin, found in turmeric and giving it its distinctive yellow color, enhances immune function with antioxidant, anti-inflammatory, antiviral, and antibacterial properties.

The Risks of Caffeine

Consuming too much caffeine can lead to health problems. The study cited 400 milligrams, or about 4 or 5 cups of coffee, as the maximum recommended amount per day. However, consuming more than this number is associated with dangerous negative effects, including:

increased pulse

Some people need to avoid or limit their caffeine intake, including people who:

are pregnant or breastfeeding
have trouble sleeping
have high blood pressure
have ulcers or gastroesophageal reflux disease
are afraid
migraine attacks
You are taking medications such as stimulants.


The most caffeinated teas are black tea, oolong tea, green tea and white tea. They all have potential health benefits as they contain antioxidants, polyphenols, flavonoids, flavonols and other health-promoting compounds.

The health benefits of tea include:

– Cardiovascular health thanks to the lowering of cholesterol levels
– weight loss
– Protection against antioxidants
– Protection from the effects of harmful UV rays
– Reduction of inflammation

If a person wants to avoid caffeine, which can cause sensory overload or interact with certain health conditions, decaffeinated varieties of popular teas are commonly available. Some teas, including many herbal teas, are naturally caffeine-free. Some health-promoting decaffeinated teas include rooibos, hibiscus, and chamomile.


Canda, BD, et al. (2014). Effects of consumption of rooibos (Aspalathus linearis) and a commercial supplement derived from rooibos on liver tissue damage by tert-butyl hydroperoxide in Wistar rats.

Chang, S.-M., et al. (2015). Effects of a chamomile tea drinking intervention on sleep quality and depression in postnatal women with insomnia: A randomized controlled trial.

Chin, JM, et al. (2008). Caffeine content of brewed teas.

Chitpan, M., et al. (2015). Chemistry and health benefits of oolong tea and theasinensins.

Ohishi, T., et al. (2016). Anti-inflammatory effects of green tea [Abstract].

Pastoriza, S., et al. (2017). Health Properties of Green and White Tea: An Update [Abstract].

Rashid. Z (2019). Molecular evidence of the health benefits of drinking black tea.

* Presse Santé strives to convey health knowledge in a language accessible to all. In NO CASE can the information given replace the advice of a doctor.

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