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Can you share your sources on this? What figures can you point to on mg/L of fluoride in (commonly consumed) green tea vs tap water? Even aside from that, it’

Can you share your sources on this? What figures can you point to on mg/L of fluoride in (commonly consumed) green tea vs tap water? Even aside from that, it’s a specious argument: people who want to avoid fluoride can just avoid green tea; it’s much harder to avoid it in tap water. As for “delusional panic”: it matters a lot for iodine absorption and thyroid function for some people, which is a both widespread and overlooked/diminished, at great harm and cost to those who are affected and unable to get help. For what it’s worth I’m not advocating for removal of fluoride from tap water, but there does need to be more recognition of the harms to those affected and serious efforts made to develop treatment approaches for those with iodine deficiencies and thyroid dysfunction, as it really is a catastrophic problem for a lot of people.

woodruffw 3y ago
> What figures can you point to on mg/L of fluoride in (commonly consumed) green tea vs tap water? Municipal tap water in the US is fluoridated between 0.7mg/L and 1.2mg/L, per the CDC's 1962 guidelines[1]. To my knowledge, most municipalities choose the lower end of that range (since the effects are diminishing and, well, it's cheaper). By contrast, at least one survey of black tea infusions finds an average of 2.65mg/L[2]. So over twice the CDC's highest baseline for municipal fluoridation. (Note: at that average for black tea, an adult would still need to drink ~4L of black tea a day to pass the CDC's tolerable upper limit. People grossly overestimate both how much fluoride is dangerous, and how much they actually consume.) [1]: https://stacks.cdc.gov/view/cdc/5160 https://stacks.cdc.gov/view/cdc/5160 [2]: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9672222/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9672222/
- xk_id 3y ago
  the argumen is much stronger for green tea. depending on time of harvesting and grow conditions, it has a lot more fluoride than black tea. this study found 7mg/L: https://pubmed.ncbi.nlm.nih.gov/34343066/ https://pubmed.ncbi.nlm.nih.gov/34343066/ General discussion: https://en.wikipedia.org/wiki/Health_effects_of_tea#Fluoride_exposure https://en.wikipedia.org/wiki/Health_effects_of_tea#Fluoride...
- nyscof1 3y ago
  [flagged]

woodruffw 3y ago

> What figures can you point to on mg/L of fluoride in (commonly consumed) green tea vs tap water? Municipal tap water in the US is fluoridated between 0.7mg/L and 1.2mg/L, per the CDC's 1962 guidelines[1]. To my knowledge, most municipalities choose the lower end of that range (since the effects are diminishing and, well, it's cheaper). By contrast, at least one survey of black tea infusions finds an average of 2.65mg/L[2]. So over twice the CDC's highest baseline for municipal fluoridation. (Note: at that average for black tea, an adult would still need to drink ~4L of black tea a day to pass the CDC's tolerable upper limit. People grossly overestimate both how much fluoride is dangerous, and how much they actually consume.) [1]: https://stacks.cdc.gov/view/cdc/5160 https://stacks.cdc.gov/view/cdc/5160 [2]: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9672222/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9672222/

xk_id 3y ago
the argumen is much stronger for green tea. depending on time of harvesting and grow conditions, it has a lot more fluoride than black tea. this study found 7mg/L: https://pubmed.ncbi.nlm.nih.gov/34343066/ https://pubmed.ncbi.nlm.nih.gov/34343066/ General discussion: https://en.wikipedia.org/wiki/Health_effects_of_tea#Fluoride_exposure https://en.wikipedia.org/wiki/Health_effects_of_tea#Fluoride...
nyscof1 3y ago
[flagged]