MatchaDB

2022Journal articleFree to read

Fluoride Content of Matcha Tea Depending on Leaf Harvest Time and Brewing Conditions.

Jakubczyk K, Ligenza A, Gutowska I, Janda-Milczarek K

Nutrients

Read at the publisher →Free full text →PubMedPubMed Central

Abstract

Matcha, or powdered green tea (Camellia sinensis) of the Tencha type, is popular all around the world, and its consumption continues to rise. Because of its unique cultivation method, it is rich in phytochemicals and has many health-promoting properties; it contains high concentrations of polyphenols, theanine and chlorophyll. Tea, and by extension matcha, contains numerous minerals, one of which is fluorine. Under physiological conditions, this mineral plays a significant role in hard tissue mineralisation processes. However, even in low concentrations, with prolonged exposure, fluoride can accumulate in the body, leading to a number of harmful effects. The aim of this study was to evaluate, for the first time, the fluoride content of the matcha infusions from different harvests, brewed using water at different temperatures (25 °C, 70 °C, 80 °C and 90 °C). The content of fluoride ions was measured by the potentiometric method. The fluoride content ranged from 3.36 to 4.03 mg/L and was dependent on both the leaf harvest time and brewing temperature. The concentration of this mineral in the dry powder ranged from 118.39 to 121.65 mg/kg. Irrespective of the water temperature or harvest time, matcha was found to have a high fluoride content, with particularly high concentrations being noted in the powder itself.

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Study type

Agronomy / cultivation

Growing, shading and harvesting tea for matcha.

Assigned automatically from the title, abstract and subject terms.

Topics

Safety, contaminants and toxicityCultivation and shadingProcessing, milling and qualityAntioxidants and polyphenols

Matcha is a main subject here (named in the title).

Keywords and subject terms

fluoridegreen teamatchapowderfluoride concentrationteabrewing temperaturefluoride accumulationmineral contenttea powderPowderFluorideAntioxidantsCamellia sinensisFluoridesPlant LeavesPowdersTeaWater

Cite this study

Jakubczyk K, Ligenza A, Gutowska I, Janda-Milczarek K. (2022). Fluoride Content of Matcha Tea Depending on Leaf Harvest Time and Brewing Conditions. Nutrients. https://doi.org/10.3390/nu14122550

DOI: 10.3390/nu14122550 · PubMed ID: 35745280 · Cited by 7 (OpenAlex)

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