Logo


W8MD Diet | COVID-19 portal | Vitamin D | Vaccine | Keto

WikiMD is the world's largest medical encyclopedia with
14,020 pages, 4,158,213 edits & 43,222,920 views.

Free unbiased diet, health and wellness info!

Tea

From WikiMD's free health, diet & wellness encyclopedia
Jump to navigation Jump to search
Tea leaves steeping in a Chinese gaiwan.

Tea is a warm drink or beverage that is popular all over the world.

How is it made?

Tea is made by soaking the dried leaves or flowers of the plant Camellia sinensis in hot water although some teas can have other herbs, spices, or fruit flavours and or lemon. However, all teas are made from the Camellia sinensis plant.[1]

Latin Names

Camellia sinensis

Types of teas

All types of tea—green, black, oolong, and white—are produced from the Camellia sinensis plant using different methods. Tea is usually brewed and drunk as a beverage, but green tea extracts are also sold in capsules and sometimes used in skin products. (Herbal teas are made from plants other than Camellia sinensis.)

Use in herbal medicine

Tea contains various components, including polyphenols, alkaloids (caffeine, theophylline, and theobromine), amino acids, carbohydrates, proteins, chlorophyll, volatile organic compounds (chemicals that readily produce vapors and contribute to the aroma of tea), fluoride, aluminum, minerals, and trace elements. The polyphenols are thought to be responsible for the health benefits that have traditionally been attributed to tea, especially green tea.

Classic Tea at the Disneyland Hotel
Classic Tea at the Disneyland Hotel

Green tea is often promoted for improving mental alertness, relieving digestive symptoms and headaches, and stimulating weight loss. Also, green tea and its extracts have been studied for their possible protective effects against heart disease and cancer.

Science

  • Although tea and/or tea polyphenols have been found in animal studies to inhibit the growth of tumors in different parts of the body, the results of human studies—both epidemiologic and clinical studies—have been inconclusive.  
  • Green tea has not been shown to be effective for weight loss.  
  • Very few long-term studies have looked at the effects of tea on heart disease risk. However, the limited evidence currently available suggests that both green and black tea might have beneficial effects on some heart disease risk factors, including blood pressure and cholesterol.

Sometimes the word "tea" is used for other drinks that have been made by soaking fruit or herbs in hot water, like "rosehip tea" or "camomile tea". These are called "herbal teas".

Types of tea

There are two main types of tea: black tea and green tea.

To make black tea, workers take the leaves and spread them out on shelves where they can dry. Next they are rolled and broken into pieces and put into a room where they absorb oxygen. Chemical reactions change the taste and style of the tea. Finally the leaves are dried with hot air until they turn brown or black. Most black tea comes from Sri Lanka, Indonesia and eastern Africa. When black tea leaves are brewed in boiling water, the tea made from them looks deep dark red, so another name used for black tea, especially in China, is red tea.

Green tea is made by putting freshly picked leaves into a steamer. This keeps them green. Then they are crushed and dried in ovens. India is the biggest maker and user of green tea.

Tea is mainly grown in China, India, Pakistan, Sri Lanka, Taiwan, Japan, Nepal, Australia, Argentina and Kenya.

The word tea can also be used as another word for an afternoon meal (mostly in the Commonwealth countries), as in "I am having tea in a short while." The word also applies to "afternoon tea", a small snack meal served sometimes, usually featuring sandwiches, cakes and tea. This small snack meal is also called "tea time".

Brewing

Green tea must steep for 2–3 minutes in water at 175 °F (79 °C). Black tea must steep for 3–5 minutes in boiling water.

Blends

Japan

Shizuoka is Japan's top producer of tea. Japan has many kinds of tea.

Indian tea (chai)

In India, tea is often served mixed with milk, and sugar that is called by it's Hindi name chai.

References


 

Tea is part of WikiMD's free ^articles!

^Tea (article) is provided for informational purposes only. No expressed or implied warranties as to the validity of content.
WikiMD is not a substitute for professional advice. By accessing and using WikiMD you agree to the terms of use.
Templates etc. when imported from Wikipedia, are licensed under CC BY-SA 3.0. See full disclaimers.
W8MD weight loss logo

Ad. Tired of being overweight?. W8MD's physician weight loss program can HELP. Tele medicine available