Fluoride in Tea - Traditional & Herbal

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Fluoride in Tea - Traditional & Herbal

Postby pfpcnews » Tue Jan 09, 2018 5:43 am

Das S(1), de Oliveira LM(2), da Silva E(2), Liu Y(3), Ma LQ(4) -
"Fluoride concentrations in traditional and herbal teas: Health risk assessment."
Environ Pollut 231(Pt 1):779-784 (2017)
. doi: 10.1016/j.envpol.2017.08.083.
Epub 2017 Aug 30.

Author information:
(1)Soil and Water Science, University of Florida, Gainesville, USA; Life Science
and Bioinformatics, Assam University, Silchar, India.
(2)Soil and Water Science, University of Florida, Gainesville, USA.
(3)Faculty of Environmental Science and Engineering, Southwest Forestry
University, Yunnan 650224, China.
(4)Soil and Water Science, University of Florida, Gainesville, USA; State Key
Laboratory of Pollution Control and Resource Reuse, School of the Environment,
Nanjing University, Jiangsu 210023, China. Electronic address: lqma@ufl.edu.

ABSTRACT:

Traditional tea (Camellia sinensis) and herbal tea are being consumed across the
world. However, long term consumption of tea can increase the chances of
fluorosis owing to the presence of fluoride (F) in teas. Therefore, it is
imperative to assess the health risk associated with tea consumption. The main
objectives of this study were to: 1) estimate total F in 47 popular teas,
including traditional and herbal teas and F concentrations in 1% (w/v) infusion
of 5 min, and 2) assess the exposure risks of F from tea consumption in children
and adults. The data showed that total F was the least in herbal teas
(33-102 mg/kg) and their infusions (0.06-0.69 mg/L) compared to traditional teas
(296-1112 mg/kg) and their infusions (1.47-6.9 mg/L). During tea infusion, 6-96%
and 18-99% of the F was released into the water from herbal and traditional teas,
respectively. Ten samples of traditional teas, including five green teas had
chronic daily intake (CDI) values of F > 0.05 mg/d/kg bw, the stipulated
permissible limits of F intake from all sources. Although the F from teas posed
no immediate health hazards with hazard quotient <1, some tea samples could
potentially contribute >4 mg F/d, thereby adding to the overall F burden.
Therefore, together with F from food and water sources, daily F consumptions from
teas might increase its health risks to humans. So, caution should be excised
when drinking teas containing high F.

Published by Elsevier Ltd.

DOI: 10.1016/j.envpol.2017.08.083
PMID: 28865383
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