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Tea leaves may release or absorb fluoride, depending on the fluoride
content of water.
As the tea plant (Camellia sinensis) is known to accumulate fluoride from the soil, the
tealeaves may contain high concentrations of fluoride, which is easily released during
infusion. In this study, we have tested the possible effect of original fluoride
concentration in the water on the fluoride release from tea. Moreover, we wanted to
test the possible capacity of tealeaves (commercially available tea) to absorb fluoride
from high-fluoride water. In low-fluoride water, fluoride is easily released from
tealeaves. Depending upon the fluoride content of the water, dried tealeaves are able
also to absorb fluoride. Thus, if a cup of tea is made from high-fluoride water, the
fluoride concentration of the infusion may actually be lower than the original fluoride
concentration of the water.
Kjellevold Malde M, Greiner-Simonsen R, Julshamn K, Bjorvatn K.
National Institute of Nutrition and Seafood Research, P.O. Box 2029 Nordnes, N-5817
Bergen, Norway.
content of water.
As the tea plant (Camellia sinensis) is known to accumulate fluoride from the soil, the
tealeaves may contain high concentrations of fluoride, which is easily released during
infusion. In this study, we have tested the possible effect of original fluoride
concentration in the water on the fluoride release from tea. Moreover, we wanted to
test the possible capacity of tealeaves (commercially available tea) to absorb fluoride
from high-fluoride water. In low-fluoride water, fluoride is easily released from
tealeaves. Depending upon the fluoride content of the water, dried tealeaves are able
also to absorb fluoride. Thus, if a cup of tea is made from high-fluoride water, the
fluoride concentration of the infusion may actually be lower than the original fluoride
concentration of the water.
Kjellevold Malde M, Greiner-Simonsen R, Julshamn K, Bjorvatn K.
National Institute of Nutrition and Seafood Research, P.O. Box 2029 Nordnes, N-5817
Bergen, Norway.
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