| http://www.w3.org/ns/prov#value | - Fluoride concentrations in the infusions (0.8 to 4.0 ppm F) are comparable with those reported in Brazil5 and other countries.4,9 The concentration range can be explained by factors such as leaf age, plant genetics, rainfall, altitude, fertilizer, type of soil, and even sample preparation.9,18 In addition, commercially available teas are a blend from a variety of sources, which is reflected by the
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