Table 3.
Content of fluorides [mg/L] in infusions of selected teas and herbs (replicates n = 9, mean ± SD)
| Brand | Package type | Origin | Brewing time [min] | |||
|---|---|---|---|---|---|---|
| 5 | 15 | |||||
| Content ± SD [mg/L] | RSD [%] | Content ± SD [mg/L] | RSD [%] | |||
| black tea | bag | China | 3.172 ± 0.066 | 2.08 | 4.085 ± 0.060 | 1.47 |
| black tea | bag | India | 2.212 ± 0.015 | 0.66 | 2.540 ± 0.012 | 0.77 |
| black tea | bag | Sri Lanka | 2.178 ± 0.051 | 2.35 | 2.442 ± 0.046 | 1.90 |
| black tea | bag | India, Indonesia | 4.480 ± 0.034 | 0.75 | 6.098 ± 0.149 | 2.45 |
| black tea | bag | India, Africa | 6.029 ± 0.127 | 2.10 | 6.759 ± 0.143 | 2.12 |
| black tea | leaf | Turkey | 1.564 ± 0.027 | 1.72 | 2.108 ± 0.104 | 4.93 |
| black tea | leaf | Turkey | 1.836 ± 0.032 | 1.75 | 2.088 ± 0.083 | 3.96 |
| black tea | leaf | Turkey | 1.595 ± 0.060 | 3.73 | 1.890 ± 0.045 | 2.39 |
| black tea | bag | Sri Lanka | 2.320 ± 0.013 | 0.56 | 2.948 ± 0.064 | 2.15 |
| black tea | leaf | Sri Lanka | 1.122 ± 0.032 | 2.87 | 1.376 ± 0.052 | 3.79 |
| green tea | bag | NA | 4.893 ± 0.053 | 1.08 | 4.908 ± 0.167 | 3.40 |
| green tea | bag | NA | 4.041 ± 0.108 | 2.68 | 4.494 ± 0.125 | 2.78 |
| green tea | leaf | NA | 2.051 ± 0.042 | 2.06 | 2.384 ± 0.102 | 4.27 |
| green tea | leaf | China, India, Sri Lanka | 0.832 ± 0.030 | 3.57 | 0.997 ± 0.034 | 3.40 |
| green tea | leaf | NA | 0.869 ± 0.018 | 2.10 | 0.944 ± 0.045 | 4.72 |
| white tea | bag | China | 2.258 ± 0.026 | 1.14 | 2.476 ± 0.120 | 4.85 |
| white tea | bag | NA | 2.359 ± 0.039 | 1.66 | 2.492 ± 0.010 | 0.38 |
| white tea | bag | India, Africa | 1.122 ± 0.006 | 0.51 | 1.186 ± 0.047 | 3.99 |
| earl grey | bag | Asia | 4.070 ± 0.054 | 1.32 | 4.722 ± 0.095 | 2.01 |
| earl grey | bag | Sri Lanka | 2.290 ± 0.021 | 0.92 | 2.930 ± 0.062 | 2.11 |
| earl grey | leaf | NA | 0.718 ± 0.012 | 1.66 | 0.817 ± 0.028 | 3.45 |
| pu-erh | bag | China | 2.634 ± 0.059 | 2.24 | 2.673 ± 0.096 | 3.57 |
| pu-erh | bag | NA | 2.169 ± 0.019 | 0.88 | 2.351 ± 0.091 | 3.88 |
| pu-erh | leaf | China | 1.186 ± 0.003 | 0.28 | 1.364 ± 0.023 | 1.65 |
| rooibos (Aspalathus linearis) | bag | RPA | 0.090 ± 0.004 | 4.47 | 0.091 ± 0.004 | 4.73 |
| rooibos (Aspalathus linearis) | bag | RPA | 0.038 ± 0.002 | 4.36 | 0.053 ± 0.002 | 3.81 |
| yerba mate (Ilex paraguariensis) | leaf | Argentina | 0.045 ± 0.002 | 4.31 | 0.066 ± 0.003 | 3.84 |
| yerba mate (Ilex paraguariensis) | fine leaf | NA | 0.041 ± 0.002 | 4.14 | 0.057 ± 0.003 | 4.53 |
| chamomile (Chamomillae anthodium) | bag | Poland | 0.043 ± 0.002 | 4.95 | 0.056 ± 0.002 | 3.18 |
| mint (Menthae piperitae folium) | bag | Poland | 0.077 ± 0.001 | 1.60 | 0.086 ± 0.004 | 4.83 |
| nettle (Urticae folium) | bag | Poland | 0.059 ± 0.003 | 4.55 | 0.075 ± 0.003 | 4.56 |
| purges (Cistus incanus) | herbal drought | Albania | 0.044 ± 0.002 | 4.46 | 0.083 ± 0.004 | 4.41 |
| yarrow (Achillea millefolium) | bag | Poland | 0.063 ± 0.005 | 7.80 | 0.065 ± 0.003 | 3.97 |
NA- data not available