Tea and Health

The Virtues of Tea

Over 4000 years ago Sheng Nong discovered thattea has the power to both stimulate and detoxify, man had gradually lost interest in its medicinal properties. In those early days it was seen primarily as a medicine, these properties being the source of its popularity. It was believed that its bitter taste favored alertness, good general health and the acquisition of greater wisdom. In Chinase medicine, under the Tang and Song dynasties, the medicinal effects of tea were increasingly recognized; it was recommended for the prevention and cure of various ailments such as headaches, 'dark thoughts' and bad digestion and also to dissolve fat. Several centuries later, Li Shizhen (1518-1593), physician and author of a book entitled 'Classification of medicinal plants', said that tea could regulate the temperature inside the body, relieve anxiety, dissolve fat, promote concentration etc..

If the stimulant, diuretic and antibacterial properties of tea have long been recognized by Chinase medicine, it is only recently that its benefits have been confirmed by modern science. Due to its antioxidant powers, the beneficial effects of tea on health are of great interest in medical research, mainly in relation to cancer prevention and the treatment of cardiovascular or degenerative diseases. Today, unlike the Taoists of old, we do not consider tea as an elixir of immortality or as a drink with mystical powers. However, there is no longer any doubt that its virtues contribute to our longevity by stimulating the functions of the heart, strengthening the immune system and preventing cell mutations.

Of course, the processing of the leaf promotes the development of new chemical compounds which alter its taste as well as its properties. As the results of this latest study show it is now difficult to generalize by family of tea as there is such a large amount of overlap. But over the centuries each family of tea has developed a certain reputation over time.

Tea picture.

THE
PROPERTIES
OF TEA
-

White tea symbol.

White tea

Refreshing, thirst quenching white tea in China is particularly consumed during the summer. According to Chinase medicine, it balances excess heat and mitigates the effects of menopause.

Green tea symbol.

Green tea

According to recent studies, some green teas contains a higher amount of polyphenols than other families of tea, which has made it very popular in the West in recent years. Thanks to its antioxidant properties, green tea can prevent some forms of cancer. Equally reknowned as an aide to concentration, green tea contains more iron, vitamins and catechins than black tea. The drying necessary to obtain a green tea helps increase the polyphenol content of leaves.

Wulong tea symbol.

Wulong tea

Steady consumption (8 grams per day) of Oolong causes weight loss by improving lipid metabolism. Its relaxing effect, anti-stress, even euphoria, is due to the high concentration of aromatic oils that are exuded from the leaves during rolling.

Black tea symbol.

Black tea

The enzymatic oxidation experienced by the leaves during the processing of black tea conGreens some of the catechins into theaflavin and thearubigins. Caffeine in black tea is released more quickly into the bloodstream, over a shorter period than that of green tea, the oxidation partially separating the tannins. Due to this, black tea acts as a more physical stimulant than green tea. Surprisingly we now find that some black teas are rich in antioxidants.

Aged tea symbol

Aged Tea

Because of its properties, Aged tea has long been used as a food supplement by several tribes and nomadic populations living in remote areas. As these people ate mostly high fat yak meat, tea allowed them to balance their diet by fighting against fat. Today we recognize the cleansing virtues of Aged tea which helps to regulate the body and aid digestion. Aged tea also helps to remove cholesterol.

ANALYSIS
OF
ANTIOXYDANTS
-

The team at CAMELLIA SINENSIS Teahouse conducted, in collaboration with the College Centres for the Transfer of Technologies TransBIOTech, a study on the levels of antioxidants and caffeine in different teas. The analyses were conducted so that the results reflect what the tea drinker gets at home, in the context of daily consumption.

Concentration of antioxidants as measured by the ABTS-TEAC method.*

All teas were brewed in a teapot, in 500 ml of water, except Matcha Sendo, which has been whipped in a bowl containing 100 ml of water. It is important to note that for the matcha, the concentration of tea compared to the amount of water is higher than other teas because we chose to measure levels of antioxidants in relation to how the tea is normally consumed.

tea

Family

Country

Symbole de poids Symbole de température Symbole de durée

CONCENTRATION OF ANTIOXYDANTS PER 250ML

Symbole du thé vert. Sencha Mobata Green Japan 5 g 75 °C 3,5 min 3410 µMOLES
Symbole du thé vert. Dong Shan Green China 5 g 85 °C 3,5 min 3180 µMOLES
Symbole du thé vert. Sencha Yamabuki Green Japan 5 g 75 °C 3,5 min 3015 µMOLES
Symbole du thé vert. Sencha Haruno Green Japan 5 g 75 °C 3,5 min 2770 µMOLES
Symbole du thé vert. Zhu Ye Qing Green China 5 g 85 °C 3,5 min 2735 µMOLES
Symbole du thé vert. Lu An Gua Pian Green China 5 g 85 °C 4 min 2500 µMOLES
Symbole du thé vert. Guricha Green Japan 5 g 80 °C 3,5 min 2490 µMOLES
Symbole du thé vert. Tan Huong Green Vietnam 5 g 85 °C 3,5 min 2435 µMOLES
Symbole du thé vert. Sencha Keikoku Green Japan 5 g 75 °C 3,5 min 2375 µMOLES
Symbole du thé vert. Sencha Nagashima Green Japan 5 g 75 °C 3,5 min 2280 µMOLES
Symbole du thé vert. Sencha Tsuyu Hikari Green Japan 5 g 70 °C 3,5 min 2215 µMOLES
Symbole du thé vert. Long Jing Shi Feng Green China 5 g 80 °C 4,5 min 2200 µMOLES
Symbole du thé vert. Bi Luo Chun Green China 5 g 80 °C 3,5 min 2105 µMOLES
Symbole du thé vert. Anji Bai Cha Green China 5 g 85 °C 6 min 1800 µMOLES
Symbole du thé vert. Huo Shan Huang Ya Green China 5 g 80 °C 4,5 min 1785 µMOLES
Symbole du thé vert. Tai Ping Hou Kui Green China 5 g 85 °C 6 min 1750 µMOLES
Symbole du thé vert. Lu Shan Yun Wu Green China 5 g 80 °C 4,5 min 1750 µMOLES
Symbole du thé vert. Gyokuro Hokuen Green Japan 5 g 70 °C 3,5 min 1535 µMOLES
Symbole du thé vert. Huiming Bai Ye Green China 5 g 85 °C 4 min 1530 µMOLES
Symbole du thé vert. Lan Xiang Green China 5 g 85 °C 4,5 min 1450 µMOLES
Symbole du thé vert. Huang Shan Mao Feng Green China 5 g 80 °C 4,5 min 1310 µMOLES
Symbole du thé vert. Kamairicha Green Japan 5 g 80 °C 3,5 min 1275 µMOLES
Symbole du thé vert. Gyokuro Shuin Green Japan 5 g 70 °C 3,5 min 1255 µMOLES
Symbole du thé noir. Darj. sungma first flush dj3 Black India 5 g 80 °C 3,5 min 1225 µMOLES
Symbole du thé vert. Bocha Green Japan 5 g 80 °C 3,5 min 1150 µMOLES
Symbole du thé vert. Bancha Shizuoka Green Japan 5 g 85 °C 4,5 min 1075 µMOLES
Symbole du thé blanc. Bai Mu Dan Blanc China 5 g 80 °C 6 min 1025 µMOLES
Symbole du thé wulong. Bai hao Wulong Taiwan 5 g 95 °C 6 min 1025 µMOLES
Symbole du thé vieilli Pu Er Xiangming 2006 Vieilli China 5 g 95 °C 4,5 min 975 µMOLES
Symbole du thé vert. Xue Ya Green China 5 g 85 °C 5,5 min 950 µMOLES
Symbole du thé wulong. Dong Ding de M. Chang Wulong Taiwan 5 g 95 °C 4,5 min 925 µMOLES
Symbole du thé vert. Sencha Ashikubo Green Japan 5 g 75 °C 3,5 min 900 µMOLES
Symbole du thé vert. Sencha Isagawa Green Japan 5 g 75 °C 3,5 min 875 µMOLES
Symbole du thé noir. Yunnan Hong Gong Fu Black China 5 g 85 °C 4,5 min 875 µMOLES
Symbole du thé vert. Kabusecha Kawase Green Japan 5 g 70 °C 3,5 min 750 µMOLES
Symbole du thé wulong. Shan Lin Xi Wulong Taiwan 5 g 95 °C 4 min 750 µMOLES
Symbole du thé wulong. Bai Hao Yin Zhen Wulong Taiwan 5 g 95 °C 4 min 750 µMOLES
Symbole du thé wulong. Xin Yang Mao Jian Wulong Taiwan 5 g 95 °C 4 min 700 µMOLES
Symbole du thé vert. Sencha Uchiyama Green Japan 5 g 75 °C 3,5 min 700 µMOLES
Symbole du thé wulong. Rou Gui Wulong China 5 g 95 °C 6 min 650 µMOLES
Symbole du thé noir. Assam Banaspaty Black India 5 g 95 °C 3,5 min 650 µMOLES
Symbole du thé noir. Darj. Sungma d'automne Black India 5 g 95 °C 3,5 min 625 µMOLES
Symbole du thé vert. Nepal Fikkal organic Green Nepal 5 g 85 °C 9,5 min 575 µMOLES
Symbole du thé vert. Sencha Tsukigase Green China 5 g 75 °C 3,5 min 575 µMOLES
Symbole du thé vieilli Pu Er Yong Ming 2006 (shou) Aged Tea China 5 g 95 °C 4,5 min 575 µMOLES
Symbole du thé wulong. Anxi Tie Guan Yin Wulong China 5 g 95 °C 4,5 min 550 µMOLES
Symbole du thé vert. Huiming Green China 5 g 85 °C 4,5 min 500 µMOLES
Symbole du thé wulong. Mucha Tie Guan Yin Wulong Taiwan 5 g 95 °C 4,5 min 450 µMOLES
Symbole du thé vieilli. Pu Er 1997 (sheng) Aged Tea China 5 g 95 °C 6 min 425 µMOLES
Symbole du thé vert. Ali shan of Mr Chen Wulong Taiwan 5 g 95 °C 6 min 425 µMOLES
Symbole du thé vert. Gyokuro Tamahomare Green Japan 5 g 65 °C 4,5 min 375 µMOLES
Symbole du thé noir. Darjeeling Singell DJ-2 Black India 5 g 95 °C 4 min 375 µMOLES
Symbole du thé vieilli Pu Er 1995 (shou) Aged Tea China 5 g 95 °C 4,5 min 375 µMOLES
Symbole du thé vert. Sencha Fukamushi Aji Green Japan 5 g 75 °C 3,5 min 375 µMOLES
Symbole du thé vert. Dragon Pearls (jasmin) Green China 5 g 85 °C 3,5 min 175 µMOLES

*ABTS: A chemical compound used to evaluate the antioxidant capacity of a food. TEAC: Trolox Equivalent Antioxidant Capacity. Unit of measurement used to express the results of the antioxidant activity exerted by a reference compound, Trolox, a water-soluble equivalent of vitamin E.

Concentration of antioxydants in Matcha

The Matcha have been whipped in a bowl with 1.5 g of tea in 100 ml of water (μMOLES / 100 ML).

Thé

Famille

Pays

Symbole de poids Symbole de température Symbole de durée

concentration d'antioxydants dans 100ml

Symbole du thé vert. Matcha Suisen Green Japan 1.5 g 75 °C 30 s 1808 µMOLES
Symbole du thé vert. Matcha Sendo Green Japan 1.5 g 75 °C 30 s 1510 µMOLES
Symbole du thé vert. Matcha Uji Green Japan 1.5g 75 °C 30 s 1486 µMOLES
Symbole du thé vert. Matcha Asahi Green Japan 5 g 75 °C 30 s 1406 µMOLES
Symbole du thé vert. Matcha Choan Green Japan 5 g 75 °C 30 s 1212 µMOLES

Concentration of antioxidants resulting from two successive infusions of 4 and 6 minutes compared to the concentration resulting from a single infusion of 10 minutes.

The four teas were brewed in a teapot, in 500 ml of water. The two successive infusions were made with the same leaves and the single infusion, with fresh leaves.

Green tea symbol. Lu an gua pian Green China
First infusion 5 g 85°C 4 min 2500 µMOLES
Second infusion Same leaves 85°C 6 min 1625 µMOLES
Single infusion 5 g 85°C 10 min 2925 µMOLES
Green tea symbol. Sencha keikoku Green China
First infusion 5 g 75 °C 4 min 2375 µMOLES
Second infusion Same leaves 75 °C 6 min 1025 µMOLES
Single infusion 5 g 75 °C 10 min 2750 µMOLES
Wulong tea symbol. Shan lin xi Wulong Taiwan
First infusion 5 g 95 °C 4 min 750 µMOLES
Second infusion Same leaves 95 °C 6 min 1050 µMOLES
Single infusion 5 g 95 °C 10 min 1725 µMOLES
Black tea symbol. Darjeeling singell dj-2 first flush Black India
First infusion 5 g 95 °C 4 min 375 µMOLES
Second infusion Same leaves 95 °C 4 min 600 µMOLES
Single infusion 5 g 95 °C 4 min 425 µMOLES

ANALYSIS
OF
CAFFEINE
-

The team at CAMELLIA SINENSIS Teahouse in collaboration with the College Centre for the Transfer of Technologies TransBIOTech, conducted a series of studies on the levels of antioxidants and caffeine in different teas. The analyses were conducted so that the results reflect what the tea drinker gets from their cup, in the context of daily consumption.

Caffeine concentration of various tea infusions (Determination of caffeine by liquid chromatography – UV)

All teas were brewed in a teapot, in 500 ml of water, except Matcha Sendo, which has been whipped in a bowl containing 100 ml of water. It is important to note that for the matcha, the concentration of tea compared to the amount of water is higher than other teas because we chose to measure levels of antioxidants in relation to how the tea is normally consumed.

Tea

Family

Country

CONCENTRATION OF CAFFEINE PER 250ML

Symbole du thé vert. Dong Shan Green China 5 g 85 °C 3,5 min 62 mg
Symbole du thé vert. Gyokuro Shuin Green Japan 5 g 70 °C 3,5 min 61 mg
Symbole du thé vert. Lu An Gua Pian Green China 5 g 85 °C 4 min 60 mg
Symbole du thé vert. Kamairicha Green Japan 5 g 80 °C 3,5 min 59 mg
Symbole du thé vert. Tai Ping Hou Kui Green China 5 g 85 °C 6 min 59 mg
Symbole du thé noir. Darjeeling Sungma 1st Flush Black India 5 g 95 °C 4 min 58 mg
Symbole du thé vert. Lan Xiang Green China 5 g 85 °C 4,5 min 58 mg
Symbole du thé vert. Sencha Tsuyu Hikari Green Japan 5 g 70 °C 3,5 min 58 mg
Symbole du thé vert. Wei Shan Mao Jian Green China 5 g 85 °C 3,5 min 58 mg
Symbole du thé vert. Wuyuan Zi Mei Green China 5 g 85 °C 3,5 min 59 mg
Symbole du thé vert. Tan Huong Green Vietnam 5 g 85 °C 3,5 min 56 mg
Symbole du thé vert. Zhu Ye Qing Green China 5 g 85 °C 3,5 min 55 mg
Symbole du thé vert. Bi Luo Chun Green China 5 g 80 °C 3,5 min 53 mg
Symbole du thé vert. Sencha Mobata Green Japan 5 g 75 °C 3,5 min 51 mg
Symbole du thé vert. Xue Ya Green China 5 g 85 °C 5,5 min 50 mg
Symbole du thé wulong. Bai Hao Wulong Taiwan 5 g 95 °C 6 min 49 mg
Symbole du thé vert. Sencha Ashikubo Green Japan 5 g 75 °C 3,5 min 48 mg
Symbole du thé vert. Long Jing Shi Feng Green China 5 g 80 °C 4,5 min 48 mg
Symbole du thé vert. Guricha Green Japan 5 g 60 °C 3,5 min 45 mg
Symbole du thé vert. Gyokuro hokuen Green Japan 5 g 70 °C 3,5 min 45 mg
Symbole du thé vert. Sencha Haruno Green Japan 5 g 75 °C 3,5 min 41 mg
Symbole du thé blanc. Bai Mu Dan Blanc China 5 g 80 °C 6 min 39 mg
Symbole du thé vert. Sencha Nagashima Green Japan 5 g 75 °C 3,5 min 37 mg
Symbole du thé vert. Hojicha Shizuoka Green Japan 5 g 95 °C 4,5 min 27 mg
Symbole du thé vieilli. Pu Er 1997 (sheng) Aged Tea China 5 g 95 °C 6 min 23 mg
Symbole du thé vieilli Pu Er Yongming 2006 (shou) Aged Tea China 5 g 95 °C 4,5 min 23 mg
Symbole du thé vert. Kamairicha Green Japan 5 g 80 °C 3,5 min 23 mg
Symbole du thé vieilli Pu Er Xiangming 2006 (sheng) Aged Tea China 5 g 95 °C 4,5 min 22 mg
Symbole du thé noir. Assam Banaspaty Black India 5 g 95 °C 3,5 min 22 mg
Symbole du thé wulong. Dong Ding de M. Chang Wulong Taiwan 5 g 95 °C 4,5 min 20 mg
Symbole du thé noir. Yunnan Hong Gong Fu Black China 5 g 85 °C 4,5 min 19 mg
Symbole du thé vieilli Pu Er 1995 (shou) Aged Tea China 5 g 95 °C 4,5 min 19 mg
Symbole du thé yerba. Yerba Maté Yerba mate Brazil 5 g 85 °C 4,5 min 18 mg
Symbole du thé vert. Bancha Shizuoka Green Japan 5 g 85 °C 4,5 min 18 mg
Symbole du thé wulong. Anxi Tie Guan Yin Wulong China 5 g 95 °C 4,5 min 17 mg
Symbole du thé vert. Bocha Green Japan 5 g 80 °C 3,5 min 17 mg
Symbole du thé wulong. Rou Gui Wulong China 5 g 95 °C 6 min 16 mg
Symbole du thé noir. Darj. Sungma d'automne** Black India 5 g 95 °C 3,5 min 16 mg
Symbole du thé wulong. Bai Hao Yin Zhen** Wulong Taiwan 5 g 95 °C 4 min 15 mg
Symbole du thé vert. Gyokuro Tamahomare Green Japan 5 g 65 °C 4,5 min 14 mg
Symbole du thé vert. Sencha Fukamushi Aji Green Japan 5 g 75 °C 3,5 min 14 mg
Symbole du thé wulong. Ali shan 1991 (charbon) Wulong Taiwan 5 g 95 °C 4,5 min 13 mg
Symbole du thé vert. Huiming Green China 5 g 85 °C 4,5 min 13 mg
Symbole du thé vert. Perles de dragon (jasmin) Green China 5 g 85 °C 3,5 min 13 mg
Symbole du thé vert. Sencha Isagawa Green Japan 5 g 75 °C 3,5 min 12 mg
Symbole du thé wulong. Mucha Tie Guan Yin Wulong Taiwan 5 g 95 °C 4,5 min 12 mg

Concentration of caffeine of Matcha Teas

The Matcha have been whipped in a bowl with 1.5 g of tea in 100 ml of water

Tea

Famyly

Country

Symbole de poids Symbole de température Symbole de durée

CONCENTRATION OF CAFFEINE PER 100ML

Symbole du thé vert. Matcha Choan Green Japan 1.5 g 75 °C 30 s 51 mg
Symbole du thé vert. Matcha Sendo Green Japan 1.5 g 75 °C 30 s 50 mg
Symbole du thé vert. Matcha Uji Green Japan 1.5g 75 °C 30 s 47 mg
Symbole du thé vert. Matcha Asahi Green Japan 5 g 75 °C 30 s 44 mg
Symbole du thé vert. Matcha Suisen Green Japan 5 g 75 °C 30 s 42 mg

Concentration of caffeine in ice tea

The tea has been infused with 7,5 g of tea in 750 ml of water.

Tea

Family

Country

Symbole de poids Symbole de température Symbole de durée

CONCENTRATION OF CAFFEINE PER 250ML

Symbole du thé vert. Long Jing iced (hot infusion) Green China 7.5 g 80 °C 3,5 min 37 mg
Symbole du thé vert. Long Jing iced (cold infusion) Green China 7.5 g 4 °C 12 h 26 mg

Concentration of caffeine in leaves of Shi Feng Long Jing against duration of the infusion

The chart below shows that much of the caffeine is released during the first three minutes of the infusion. It is also found that after six minutes of infusion, even if the curve is stabilizing, the release of caffeine continues.

Proportion of caffeine by infusion time graphic

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