Written by Chanel M. contributed by Kyle J. Norton, All right reserve
Wuyi Cliff Oolong tea, the best of Oolong and one of 3 ingredients of Tava Tea, is a species of Camellia sinensis belonging to the family Theaceae, native the Wuyi Mountain area. Its leaves and leaf buds has been used as tea in Chinese culture and many places in the world, including Wuyi Rock Tea, Tie Guan Yin tea, Taiwan tea and Oolong tea, Iron Goddess of Mercy and other products in Fujian, etc.. Oolong can be bought as green or black tea but it is best known as a black tea in the process of withering under the strong sun and oxidation before curling and twisting.
Oolong tea's Side Effects
Oxalates
a. In the evaluation of oxalstes effects in tea of the study of "Oxalate content and calcium binding capacity of tea and herbal teas" by Charrier MJ, Savage GP, Vanhanen L.[3a], researchers found that a regular tea drinker consuming six cups of tea/day would have an intake of between 26.46 and 98.58 mg soluble oxalate/day from loose black tea, 17.88 and 93.66 mg soluble oxalate/day from black tea in tea bags and a maximum of 18.0 mg/day from herbal teas. The oxalate intake from the regular daily consumption of black teas is modest when compared to the amounts of soluble oxalate that can be found in common foods. However, oxalate in black teas has the potential to bind to a significant proportion of calcium in the milk, which is commonly consumed with the black teas.
b. In the measurement of the availability of oxalate normally extracted of the study of "Bioavailability of soluble oxalate from tea and the effect of consuming milk with the tea" by Savage GP, Charrier MJ, Vanhanen L [3b], researchers found that consuming black tea on a daily basis will lead to a moderate intake of soluble oxalate each day, however the consumption of tea with milk on a regular basis will result in the absorption of very little oxalate from tea.
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Sources
[3a] http://www.ncbi.nlm.nih.gov/pubmed?term=oolong%20tea%20and%20Oxalates
[3b] http://www.ncbi.nlm.nih.gov/pubmed/12627177
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