Abstract

The fluoride contents of infusions prepared from 44 different brands and types of teas were measured. Fluoride concentrations ranged from 0.34 to 3.71 ppm (mean = 1.50 ppm) in caffeinated tea infusions, 0.02-0.14 ppm (mean = 0.05 ppm) in herbal tea infusions, and 1.01-5.20 ppm (mean = 3.19) in decaffeinated tea infusions. This is the first report of the fluoride content of decaffeinated teas. The mean fluoride content of decaffeinated tea infusions is significantly (p < 0.01) higher than the corresponding caffeinated tea. The use of mineral water containing a naturally high fluoride level during the process of decaffeination is the most likely explanation of the above observation.

• Related Studies :

  • Analysis of naturally occurring fluoride in commercial teas and estimation of its daily intake through tea consumption

    The aim of this study was to determine the levels of fluoride in commercial teas and to estimate the contribution of tea consumption to the fluoride recommended daily allowance. A total of 558 tea products in 6 categories, green tea, black tea, oolong tea, pu'er tea, white tea, and reprocessed

  • Risk assessment of fluoride daily intake from preference beverage.

    Background/purpose Tea, coffee and alcohol beverages are called preference beverage and are drunk habitual and in large quantities. Therefore, there is a high possibility that a health risk is caused by the contained components, and risk assessment of intake is essential. However, the risk assessment of fluoride intake from preference beverages

  • Comparative study of vegetative and reproductive growth of different tea varieties response to different fluoride concentrations stress.

    Highlights A low-level and a high-level fluoride varieties were selected for the morphological and transcriptome analysis to explore their different regulate network for the fluoride stress. High-fluoride tea tree varieties had stronger ROS-scavenging ability than low-fluoride varieties. High-fluoride tea tree varieties could maintain the normal growth and reproduction under high-fluoride

  • Predictors of Plasma Fluoride Concentrations in Children and Adolescents.

    Despite increasing concerns about neurotoxicity of fluoride in children, sources of fluoride exposure apart from municipal water fluoridation are poorly understood. We aimed to describe the associations of demographics, drinking water characteristics, diet, and oral health behaviors with plasma fluoride concentrations in U.S. children. We used data from 3928 6–19-year-olds

  • The effects, both separate and interactive, of smoking and tea consumption on urinary fluoride levels.

    The goal of this study was to investigate the effects of smoking and tea consumption on urinary fluoride ion (F) levels and whether any interactive effects occurred. Three hundred university students were recruited to provide urinary samples. An Orion 4-Star ion-meter, equipped with an ion selective electrode (ISE), was used

• Related FAN Content :

  • Estimated "Threshold" Doses for Skeletal Fluorosis

    For over 40 years health authorities stated that in order to develop crippling skeletal fluorosis, one would need to ingest between 20 and 80 mg of fluoride per day for at least 10 or 20 years. This belief, however, which played an instrumental role in shaping current fluoride policies, is now acknowledged by the National Academy of Sciences (NAS) and other US health authorities to be incorrect.

  • The Lancet: Fluoride Studies in a Patient with Arthritis

    It is possible that fluoride intake from tea may be sufficient to cause fluorosis, and I report here a case which gives some evidence for this.

  • Fluoride content in tea and its relationship with tea quality.

    J Agric Food Chem. 2004 Jul 14;52(14):4472-6. Fluoride content in tea and its relationship with tea quality. Lu Y, Guo WF, Yang XQ. Department of Tea Science, Zhejiang University, 268 Kaixuan Road, Hangzhou 310027, People's Republic of China. Abstract: The tea plant is known as a fluorine accumulator. Fluoride (F) content in fresh leaves collected

  • Fluoride Content of Tea

    Tea, particularly tea drinks made with lower quality older leaves, contain high levels of fluoride. Because of these high levels, research has found that individuals who drink large amounts of tea can develop skeletal fluorosis -- a painful bone disease caused by excessive fluoride intake. Since skeletal fluorosis is often misdiagnosed by

  • Exposure Pathways Linked to Skeletal Fluorosis

    Excessive fluoride exposure from any source -- and from all sources combined -- can cause skeletal fluorosis. Some exposure pathways , however, have been specifically identified as placing individuals at risk of skeletal fluorosis. These exposure pathways include: Fluoridated Water for Kidney Patients Excessive Tea Consumption High-Fluoride Well Water Industrial Fluoride Exposure Fluorinated Pharmaceuticals (Voriconazole