Caffeine In Tea: The Ultimate Guide For Your Safe And Healthy Drink

Caffeine In Tea

Are you aware that you consume Caffeine every time you sip from that cup of tea?

This guide explains everything you need to know about the amount of caffeine in your tea.

You will learn what tea is, types, the benefits, sources and how much is too much



What Is Tea?  

Tea is an aromatic beverage commonly prepared by pouring hot or boiling water over cured leaves of the Camellia Sinensis

Camellia sinensis an evergreen shrub native to East Asia.

After water, it is the most widely consumed drink in the world


It is the most popular manufactured drink consumed in the world 

Tea Benefits Of Caffeine 

Drinking caffeinated tea will improve your mental alertness. 

There is preliminary evidence that the caffeine from long-term tea  consumption provides a small amount of protection against the progression of dementia or Alzheimer’s disease during aging

The results across numerous studies were inconsistent

The given range of caffeine content depends on the variety of tea and how long it is steeped.

Caffeine In Tea

How much caffeine in a cup of tea? 

 A typical 8-ounce cup of tea prepared from one tea bag contains 40 mg of caffeine

How much caffeine in Tea Bag?

Tea contains less caffeine than coffee. A typical 8-ounce cup of tea prepared from one tea bag contains 40 mg of caffeine


Types of Tea

Tea is generally divided into categories based on how it is processed.

Green, black, and oolong teas all come from the same plant, Camellia sinensis, but are prepared using different methods.

To produce green tea, fresh leaves from the plant are lightly steamed.


What is white tea? 

White tea is the least processed of the three teas.

Because of this, it retains a high amount of antioxidants (2, 3).

This is thought to be one reason why studies have linked white tea with many health benefits such as:

  • Reducing the risk of heart disease
  • Combating skin aging
  • Weight loss.

It also refers to one of several styles of tea which generally feature young or minimally processed leaves of the Camellia sinensis plant.

White tea is not rolled or oxidized, resulting in a flavor characterized as “lighter” than most green or traditional black teas.

White tea, like black and green tea, is made from the Camellia sinensis plant and contains polyphenols, a set of phytonutrients that are thought to be responsible for the health effects of tea

How Much Caffeine In White Tea? 

White tea contains 35mg of caffeine

Oolong tea  

Oolong is a traditional semi-oxidized Chinese tea produced through a process including:

 Withering the plant under strong sun and oxidation before curling and twisting.

Most oolong teas, especially those of fine quality, involve unique tea plant cultivars that are exclusively used for particular varieties.

The degree of oxidation, which varies according to the chosen duration of time before firing, can range from 8–85%, depending on the variety and production style.

Oolong is especially popular in south China and among Chinese expatriates in Southeast Asia, as is the Fujian preparation process known as the Gongfu tea ceremony.

The Journal of Food Science recently tested several varieties of Oolong tea and they discovered varying levels of caffeine.

Caffeine In Oolong Tea

Oolong teas contain about 45 mg of caffeine per cup.

Oolong Tea Benefits 

Oolong tea may not be as well known as green or black tea, but it has similar health benefits.

These include benefits for heart, brain, bone and dental health.

In addition, it may boost your metabolism, decrease your risk of developing type 2 diabetes and protect against certain types of cancer


Black Tea   

Black tea retains its flavor for several years

It accounts for over 90% of all tea sold in the West

Caffeine In Black Tea

How Much Caffeine In Black Tea? 

The Caffeine in black tea is 47 mg Caffeine per one cup of 8 ounce



What are the disadvantages of drinking black tea?

High amounts of black tea can cause side effects due to the caffeine in black tea.

These side effects include:

Headache, nervousness, sleep problems, vomiting, diarrhea.

Irritability, irregular heartbeat, tremor, heartburn, dizziness. Ringing in the ears, convulsions, and confusion.

Black tea is a type of tea that is more oxidized than oolong, green, and white teas.

It is generally stronger in flavor than the less oxidized teas.

Two principal varieties of the species are used:

  • Small-leaved Chinese variety plant, used for most other types of teas
  • Large-leaved Assamese plant, which was traditionally mainly used for black tea 


 It is a type of tea that is made from Camellia sinensis leaves and buds that have not undergone the same withering and oxidation process used to make oolong teas and black teas.

Green Tea

It originated in China, but its production and manufacture have spread to many other countries in Asia.

Caffeine In Tea

How much caffeine in green tea?  

This amount of green tea provides about 200 mg of caffeine.

However, drinking more than 2 cups of green tea per day is unsafe.

Consuming more than 2 cups of green tea daily has been linked to an increased risk of miscarriage and other negative effects. 

Several varieties of green tea exist, which differ substantially based on the variety of C. Sinensis used growing conditions, horticultural methods, production processing, and time of harvest.

There has been considerable research on the possible health effects of consuming green tea regularly

There is little evidence that drinking green tea has any effects on health.

Regular green tea is 99.9% water, provides 1 Calorie per 100 mL serving, is devoid of significant nutrient content


The given range of caffeine in tea depends on the variety of tea and how long it is steeped.


Green tea. National Center for Complementary and Integrative Health, US National Institutes of Health. 30 November 2016. Retrieved 27 February 2018.

“Caffeine and Tea Information”. Stash Tea. Retrieved 15 July 2009.

Panza, Francesco; Solfrizzi, V.; Barulli, M. R.; Bonfiglio, C.; Guerra, V.; Osella, A.; Seripa, D.; Sabbà, C.; Pilotto, A.; Logroscino, G. (2014). “Coffee, tea, and caffeine consumption and prevention of late-life cognitive decline and dementia: A systematic review”

The Journal of Nutrition, Health & Aging. 19 (3): 313–328. doi:10.1007/s12603-014-0563-8ISSN 1279-7707PMID 25732217.

 “Black tea”. MedlinePlus, US National Library of Medicine. 30 November 2017. Retrieved 27 February 2018.

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