06 August 2024

How Much Caffeine Is in Green Tea?

An 8-ounce (230-ml) cup of green tea contains between 30 and 50 milligrams of caffeine. Bagged teas tend to be more caffeinated than loose leaf teas.

reen tea is a popular drink with many health benefits.

In fact, some studies have linked green tea with improved brain function and brain aging. It may also reduce the risk of heart disease, type 2 diabetes and cancer (1Trusted Source, 2Trusted Source, 3Trusted Source, 4Trusted Source).

However, just like regular tea, green tea contains caffeine. This can be a concern for people who want to be aware of or limit their caffeine intake.

This article explores how much caffeine is in green tea and how this type of tea compares to other caffeinated drinks.

turally occurring chemical found in the leaves, beans and fruits of more than 60 plants, including the leaves of tea plants (5Trusted Source).

It’s a central nervous system stimulant that is consumed all over the world to boost alertness and fight fatigue.

It works by blocking the effects of a neurotransmitter called adenosine, which builds up over the course of the day and makes you feel tired (6Trusted Source).

Drinking caffeine has also been linked with a number of health benefits, such as improved mood and brain function, an increase in metabolism and improved exercise performance (5Trusted Source, 7Trusted Source, 8Trusted Source, 9Trusted Source).

However, some people may be more sensitive to the effects of caffeine than others (10Trusted Source, 11Trusted Source).

Additionally, people who consume too much caffeine may experience restlessness, insomnia or an irregular heartbeat (12Trusted Source).

Summary: Caffeine is a naturally occurring stimulant
that can help you stay alert and awake. Consuming caffeine may also have some
health benefits, such as improved brain function.

How Much Caffeine Is in a Cup of Green teaThe average amount of caffeine in an 8-oz (230-ml) serving of green tea is around 35 mg (5Trusted Source).

However, this can vary. The actual amount can be anywhere between 30 and 50 mg per 8-oz serving.

Since the caffeine in green tea occurs naturally, the amount depends largely on the variety of tea plant, its growing conditions and the way it is processed and brewed.

For example, tea made with older leaves usually has less caffeine than tea made with younger tea leaves (13Trusted Source).

The amount of caffeine in your drink can also be influenced by the type of green tea you choose and how you prepare it.

For example, bagged teas tend to be more caffeinated than loose leaf teas.

This may be because the tea leaves in tea bags are crushed up, so more caffeine is extracted and infused into the drink (14Trusted Source, 15Trusted Source).

Additionally, powdered green teas like matcha have a higher caffeine content than both bagged and loose green tea.

Nevertheless, portion sizes tend to be small — 1 gram or half a teaspoon per serving — for powdered teas, so the caffeine content of the bagged tea and powdered matcha tea can be similar (16, 17Trusted Source).

Finally, the longer you brew your tea and the hotter the water, the more caffeine will make its way into your drink (18Trusted Source).

Summary: An 8-ounce cup of green tea contains between 30
and 50 mg of caffeine. Powdered green tea like matcha contains more caffeine
than loose leaf or green tea bags.

Green Tea Contains Less Caffeine Than Other Caffeinated Beverages

Caffeine is found in a wide range of beverages like black tea, coffee, soft drinks and energy drinks.

Here’s the caffeine content in 8 ounces (230 ml) of some popular drinks so you can compare the caffeine content (5Trusted Source):

Green tea: 30–50 mg
Instant
coffee: 27–173 mg
Plain,
brewed coffee: 102–200 mg
Espresso: 240–720 mg
Black tea: 25–110 mg
Yerba mate: 65–130 mg
Soft drinks: 23–37 mg
Energy
drinks: 72–80 mg

As you can see, the caffeine content per 8 ounces is usually much higher for other caffeinated beverages.

Like green tea, there is a range of caffeine in these drinks. Yet black tea contains, on average, around 55 mg of caffeine per 8 ounces, while brewed coffee contains 100 mg.

Interestingly, green tea also contains the amino acid L-theanine, which has been shown to work synergistically with caffeine. Thus, you get a milder but different kind of buzz than with coffee, despite the lower caffeine content of green tea (19Trusted Source).

In particular, the combination of L-theanine and caffeine has been shown to help improve both alertness and focus, which may make green tea a better drink than coffee if you’re doing tasks that require a lot of thought (20Trusted Source).

Summary: Green tea usually contains around half the
amount of caffeine as brewed coffee and less than other caffeinated beverages
like black tea, soft drinks and energy drinks.

975578661

Related Posts