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  • No matter where you are on Earth, the chance is high that someone will drink this substance not far from you. And although it is consumed a lot by humans, not a single country has declared it illegal. We are talking about caffeine. What does the watchmaker have in me? For this article, we have researched countless studies to tell you more about this interesting remedy. Today we discover what the miraculous fabric is all about!

Caffeine Tea Field India


What is caffeine?

1,3,7-trimethyl-3,7-dihydro-1H-purine-2,6-dione. This is the chemical name of the most commonly consumed pharmacological substance in the world. The drug has been used by people for thousands of years because of its Performance-enhancing properties Used. In 1819, the chemist and pharmacist Friedlieb Ferdinand Runge succeeded for the first time in isolating pure caffeine from the coffee bean. In the pure state, the substance has a bitter taste and consists of small, white crystals.

The term “caffeine” comes from the fact that the substance has long been associated only with coffee. In addition to the coffee bean and the tea plant, the kolanuss, mate, guarana and in small amounts also the cocoa bean has caffeine. The substance is produced by the plants to protect against insects. It serves as a natural defence mechanism against insects.


Effects and Effects of Caffeine (in Tea)

Caffeine is primarily a stimulant that increases the ability to concentrate. In addition, signs of fatigue are eliminated and the central nervous system is stimulated. A study by the Nature Neurosience Caffeine also has a positive effect on concentration, attention and even long-term memory. Caffeine can also cause negative effects if the quantities are too large. According to a opinion of the European Food Safety Authority, regular intake of up to 400 milligrams of caffeine in a normal-weight adult Safe. The exception is pregnant women who should not consume more than 200 milligrams of caffeine.

Regular intake above the recommended guideline can lead to a slight increase in blood pressure or even anxiety. An overdose occurs approximately when taking approximately Zten grams of pure caffeine A. For this amount, more than 100 cups of tea would have to be consumed.

In coffee, the caffeine is bound to a chlorogenic acid potassium complex. This releases the caffeine immediately when in contact with the stomach acid. The Koffein in tea, on the other hand, is bound to polyphenolswhich only develop the effect in the intestine. In tea, the stimulating agent thus Slower And over a longer period of time across the way.


Caffeine in tea – which varieties have the highest amount?

It is quite difficult to determine how much caffeine which types of tea contain. How much of the watchmaker ends up in the drink depends on many factors. With higher water temperature and a longer drawing time, the caffeine content of the teas also increases. There are myths that say varieties like green or white tea have less caffeine than other teas from the tea plant. That’s wrong. White and green tea is generally infused with a lower water temperature than, for example, black tea. At the lower temperature, less caffeine is released from the leaves. A Dissertation of the TU-Braunschweig According to white tea in the dry matter even has a higher caffeine content than green or black tea.

In general, it can be said that teas from young leaves and buds tea plant has a higher caffeine content than teas from older leaves of the shrub. The young leaf shoots are more susceptible to attacks by insects and therefore form an increased amount of caffeine as a defensive reaction.

The values shown below are obtained by extracting the complete caffeine content from the leaves. Most studies use boiling hot water to brew the teas. With a lower water temperature and drawing time, the value is lower. At a water temperature of 50-60 degrees, the value must be roughly halved. At a temperature of 70-80 degrees, the value should be reduced by 20 percent.

The actual content can vary greatly depending on the variety and preparation. The information shown below should be understood as a yardstick, not as a fixed value.



VarietyQuantity of caffeineSize of portion

Tees from Taiwan

High Mountain Oolong671 mg240 ml
Wenshan Baozhong721 mg240 ml
Dong Ding Oolong731 mg240 ml
Green Tea, Taiwan1001 mg240 ml
Black Tea, Taiwan1041 mg240 ml
Oriental Beauty Oolong1081 mg240 ml

Tees from Japan

Gyokuro702 mg300 ml / 2 g
Sencha, 1. Picking57.42 mg300 ml / 2 g
Sencha, 2. Picking562 mg300 ml / 2 g
Sencha, 3.55.42 mg300 ml / 2 g
Matcha, High quality772 mg80 ml / 2 g
Matcha, Medium Quality70.22 mg80 ml / 2 g
Matcha, Low quality64.62 mg80 ml / 2 g
Kukicha, Medium Quality242 mg300 m / 3 g
Bancha 432 mg300 ml / 3 g
Hojicha432 mg300 ml / 3 g
Genmaicha422 mg300 ml / 3 g

Other caffeinated beverages

Starbucks Coffee54.79 mg100 ml
Coca Cola®8 mg100 ml
Fritz Cola, Afri Cola25 mg100 ml


1Values refer to a study by Taiwan’s Tea Research and Extrention Station (TRES). The study is written in Mandarin. A translated content was taken from an article by Eco Cha teas.

2Yamamoto, Takehiko et. al.: Chemistry and Applications of Green Tea, CRC Press, 1997, p. 14; Ecopro Research Co. Ltd., By Standard Table of Food Composition in Japan, 2000


Caffeine Calculator

With this caffeine calculator you can easily calculate your amount of caffeine. Simply select the variety and quantity and the calculator will tell you the caffeine content!

How much caffeine is tolerated?

Each person is different and reacts differently to external influences. This also applies to caffeine. There are people with a high sensitivity to the substance and people who are very insensitive to the substance. So everyone should first find out for themselves how much you can tolerate and in what quantities you can enjoy tea.

The European Food Safety Authority recommends for an adult weighing 70 kilograms, not more than 400 milligrams of caffeine per day to eat. In the case of pregnant women, a value of 200 milligrams per day Recommended. Before enjoying tea during pregnancy, however, it is best to consult with your doctor.

Children can per kilogram of body weight 3 milligrams of caffeine a significantly small amount as adults.


Caffeine in black tea

Tea varieties for caffeine-sensitive people

Even if you can tolerate only a few caffeine, this does not mean that you have to give up tea. There are many types of tea that have an extremely low caffeine content. Roasted teas or varieties with a high content of leaf stalks generally have a much lower content of the watchmaker. The Japanese kukicha (translated as “stems”) consists of up to 50 percent of the refined stems of the tea plant. These hardly contain caffeine. You will also find a delicious Kukicha with us in the online shopGenmaicha is another low-caffeine tea. The tea was mixed with roasted rice. This makes the tea less stimulating, more tolerable and at the same time more affordable!

too roasted teas have a lower caffeine content than unroasted teas. The stronger the roasting, the less stimulating the tea is. One of the roasted teas is the Japanese Hojicha, which also has a high proportion of low-caffeine leaf stalks. With a comparatively low caffeine value, the Hojicha a popular drink in Japan, especially among the elderly and children.

Teas from very young and delicate leaves of the tea plant yield teas with the highest content of the stimulating substance. Consequently, older and more mature tea leaves have a lower content of the stimulating means. For this reason, many oolong teas have a lower caffeine content than other varieties. At Oolong tea, not the usual top two leaves and the young leaf bud (two leaves and a bud), but the top three to four leaves picked. Oolong is also picked a few weeks later than most green, black or white teas. For the production of Oolong, we have a dedicated to own articles! The result is a less stimulating effect in Oolong. Roasting the tea further reduces the content, which is why roasted oolong has little caffeine.

Here is a list of low-caffeine teas:

  • Bancha
  • Genmaicha (tea with roasted rice)
  • Kukicha (teas with high proportion of refined leaf stems)
  • Karigane (Kukicha from Gyokuro)
  • Rolled oolongs
  • Roasted Oolongs
  • Sannenbancha

Caffeine-free teas (teas not made from the tea plant):

  • Rooibos Tea
  • Honeybush Tea
  • Fruit tea
  • Herbal
  • Mugicha (Japanese barley tea)
  • Chrysanthemum tea

Chemical effect of caffeine

When we are mentally active, our neurons consume energy when awake state, producing a secondary substance called adenosine. Adenosine settles at certain receptors in the brain and activates a signal. This gives the nerve cells a sign to work less. We get tired. This process is designed to protect our brains from reworking.

Caffeine is very similar to adenosine from its chemical structure. The modles can occupy the adenosine receptors, but they are not activated. The adenosine released is prevented from docking to the receptors by caffeine. This does not send a signal to the nerve cells in the brain, blocking the feeling of fatigue.

Regardless of its ability to eliminate the feeling of fatigue, caffeine has, according to the US Institute of Medicine further skills to increase cognitive performance. This includes, among other things, increased memory and attention, as well as a fast reaction time.


Watchmaker pleasing?

Puh, what a long article, isn’t it? We have read countless studies for this post to make sure everything is correct. Tea has always been our faithful companion to keep concentration on top. If you are also looking for a delicious watchmaker, take a look at our online shop Over! Great varieties from all over the world are waiting for you there. We look forward to your visit.