Category Archives: Black Tea

Herbal Teas and Antioxidants

Evidence shows that black and green tea are rich in antioxidants, and it is these antioxidants that provide tea with some of its health effects. Antioxidants are important components of a healthy diet because they accumulate in tissues and protect … Continue reading

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Is It Worth Changing Tea Brands Regularly?

Tea is a healthy tea because it contains high amounts of antioxidants. The antioxidants in tea are dependent on the type of tea consumed. Green tea contains mainly flavonoids of the flavan-3-ol class called catechins. Catechins are known to have … Continue reading

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The Fluoride Content of Different Teas

Fluoride is almost ubiquitous in food. Because water contains trace amounts of fluoride naturally, and because fluoride is also added to drinking water, the mineral is present in nearly all foods. All drinks made with water are also likely to … Continue reading

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The Effects of Black Tea on Mood

After water, tea is the most commonly consumed drink in the world. Black tea is an oxidised form of tea and that has been researched and shown to possess a number of health effects including benefits to cognition and mood. … Continue reading

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Why Does the L-Theanine Content of Tea Vary?

Tea is a unique source of an amino acid called L-theanine. L-theanine is of interest to nutritionists because evidence suggests that L-theanine can alter brain chemistry which result in changes to brain wave pattern. These changes cause the excitability of … Continue reading

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Degradation of Carotenes in Tea Leaves

Tea leaves contains a number of phytochemicals that are degraded during the fermentation step to produce black tea. It has been suggested that these degradation products contribute significantly to the aroma and taste of black tea. A number of studies … Continue reading

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Carotenoids in Black Tea

Carotenoids are antioxidant pigments found in plants. Like many plants the tea plant (Camellia sinensis) is a good source of carotenoids, and there is evidence that they are bioavailable from brewed green and white tea. Once consumed, the carotenoids pass … Continue reading

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L-Theanine: It’s Effects on Mental State

L-theanine is an amino acid found in the tea plant (Camellia sinensis). When tea is brewed, L-theanine passes from the tea leaves into the water. Consuming tea therefore provides a source of L-theanine, and studies show that the L-theanine from … Continue reading

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Antioxidants in Tea

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Is Tea an Anti-anxiety Drink?

Tea is a complex mixture of chemicals and these have been isolated and characterised. Evidence suggests that tea has a calming effect, and this may relate to the unique chemical composition of the drink. The calming effects of tea may … Continue reading

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