Black tea

Summary

Medicinal plant and drink used mainly as a stimulant in cases of fatigue. It is almost always presented in the form of tea.

names

Portuguese name: Black tea, tea, Indian tea
Binomial name: Camellia sinensis (L.) Kuntze
French name: Thé noir
English name: black Tea
German name: Schwarzer Tee , Tee
Italian name: tè nero

Family

Theaceae

Constituents

Purine alkaloids such as caffeine (theine), flavonoids and polyphenols (quercetin, catechins, kaempferol), triterpenes, essential oil, tannins.

Note: A 2017 study conducted in mice showed that black tea polyphenols, which are too bulky to be absorbed in the small intestine, stimulate the growth of gut bacteria and the formation of short-chain fatty acids, a type of bacterial metabolite that has been shown to modify hepatic (liver) metabolism. Polyphenols in black tea and green tea may support weight loss (see also Notes below). This study was published on September 30, 2017 in the scientific journal European Journal of Nutrition (DOI: 10.1007 / s00394-017-1542-8).

parts used

Sheets

Effects

Stimulant (caffeine), diuretic (caffeine), slimming, antioxidant (flavonoids).

Indications

Fatigue (caffeine), aging (antioxidant, thanks to flavonoids), migraine (caffeine), diarrhea (tannins): to treat diarrhea it is necessary to let the tea steep for about ten minutes, stress (according to clinical studies in 2007), gastroenteritis , canker sores (apply a wet sachet on the canker sores), hypertension, styes (soak a sachet in cold or hot water and apply directly to the eyelid), possibly in case of overweight and obesity (see Observations below).

Secundary effects

Excitement, trouble falling asleep, constipation (difficulties with intestinal transit if you drink several glasses a day).

contraindications

Heart problems (due to the caffeine content).

Interactions

We don’t know.

Black tea-based preparations

– *Black tea

* It is recommended when preparing black tea to infuse the sachet for 3 minutes if you want a tea rich in caffeine (theine), useful in cases of fatigue or migraines.

However, if we let it infuse for more than 3 or 10 minutes, we will obtain a tea rich in tannins, which mask the caffeine (its content decreases) and can then be used to fight light diarrhea. This tea has less exciting effects which makes it ideal to be consumed at night, before going to sleep (for people sensitive to caffeine).

Where does the black tea plant grow?

Tea grows mainly in Asia. This plant is native to Asia (China, Japan, Russia and India). This plant can reach up to 1.5m in height when grown.

Comments

– Very consumed beverage all over the world. After water, tea is the most consumed beverage in the world.
Tea is mainly used for its flavor and not necessarily for its exciting effect as is the case with coffee . Its antioxidant virtues make it one of the most recommended drinks as a means of prevention and treatment.

– China is the world’s largest producer of black tea, ahead of India.

– According to an Australian study published in 2012, drinking a cup of black tea 3 times a day helps to slightly lower blood pressure, in the order of 2 to 3 mmHg. The study was carried out by the University of Western Australia in Perth (Australia), with 95 participants who drank black tea regularly. Flavonoids, which can be found in significant amounts in black tea, may be responsible for this hypotensive effect.

– In the 17th century, the Dutch were the first to import tea from Europe, through the Dutch East India Company .

– Overweight and obesity:
According to a study carried out on mice by researchers at the University of California at Los Angeles (UCLA), black tea could help weight loss due to a change in the amount of certain bacteria (microbiota). This effect happened both with the ingestion of black tea and green tea (an already known effect), the percentage of bacteria associated with obesity decreased, while the percentage of bacteria associated with thinness increased. Scientists have discovered that black tea alters metabolism in the liver, transforming intestinal metabolites. In this experiment, black and green teas did not contain caffeine and were rich in polyphenols (see also Active ingredientsabove). Dr. Susanne Henning of UCLA who conducted this study explained in a press release about the study that black tea and green tea act as prebiotics, that is, substances that promote the growth of microorganisms beneficial to health. This study was published on September 30, 2017 in the scientific journal European Journal of Nutrition (DOI: 10.1007 / s00394-017-1542-8).

Jeanne Kenney
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I’m a stylist trainer, a content creator, and an entrepreneur passion. Virgo sign and Pisces ascendant, I move easily between my dreams, the crazy world I want, and my feet on the ground to carry out my projects.

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