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Black tea contains many polyphenols, but contains a different blend from green teas and other teas. All tea contains catechins, a type of polyphenol that is responsible for some of the health benefits of tea. In addition, black tea contains theaflavins, including Theaflavin-3-gallate and many others; these chemicals are not found in green tea, and they are thought to convey health benefits similar to the catechins. Many of these chemicals function as antioxidants.
Black tea also contains caffeine, together with small amounts of theobromine and theophylline. It is often said that black tea contains "tannins", but these refer to the polyphenols, which can be classified as tannins; tea does not actually contain tannic acid.
Tea contains very little protein but it does contain more theanine than one would expect; this is more true of some teas than others. Theanine is an essential amino acid and is thought to work synergistically with caffeine to promote more alertness with a lower caffeine intake.
Tea also contains some minerals, and can contain a lot of fluoride and aluminum, often due to pollution.
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoTea contains the antioxidant catechins, amino acid L-theanine, polyphenols, theobromine, theophylline, and tannins. The small amount of aluminum and fluoride found in tea is a result of environmental pollution.
Wiki User
∙ 13y agocaffeine, fluoride and flavonoids
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