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Green Tea, Fluoride Reduce Thyroid Function By As Much As 50%

Discussion in 'Beverages, Fruits, Sugars' started by haidut, Jun 22, 2015.

  1. haidut

    haidut Member

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    Ray has written that green tea is also quite estrogenic, so I am not surprised to see this effect. Fluoride is apparently also a well-known thyroid inhibitor as stated by the scientists. If this is well known then why do we have fluoride in the tap water?!?
    Also, caffeine, as expected, did not have detrimental effect on thyroid function.

    http://suppversity.blogspot.com/2015/06 ... n-tea.html

    "...As you can see in Figure 1, there was the expected significant decrease in serum T3 and T4 in the PTU treated group (T3 = 0.72±0.03). Similar, albeit less pronounced decreases were seen in the green tea (T3 = 0.96±0.04) and the fluoride (T3 = 0.93±0.04), but not in the caffeine group where only the T3 levels were significantly suppressed (T3 = 1.46±0.08) in comparison to the control group (T3 = 1.71±0.05)."

    "...What we do know, at least, is that EGCG interacts with thyroid hormones. Kato et al. (2011), for example, found that it inhibits the effects of thyroid hormones on bone cells. In view of the fact that many studies which have observed ill effects of green tea catechins on the thyroid all used regular extracts which may contain both caffeine and fluoride (Sakamoto. 2001, we cannot tell whether EGCG, EC, ECG & co will have a negative effect on your thyroid health if they come in caffeine- + fluoride-free form. Luckily, Chandra et al (2010) must have foreseen this problem in their 2010 study in which they found that purified green tea catechins (no caffeine, no fluoride | C in Figure 2) have even more pronounced anti-thyroid effects than green tea extracts. The independent anti-thyroid effects of green tea catechins would also exlpain why previous studies show that the effect is sign. less pronounced for black tea extracts (Chandra. 2011)."


    So, green tea and fluoride had similar effect to PTU - a known thyroid toxin used to "treat" hyperthyroidism. It looks like it's the green tea catechins specifically that are to blame as black tea was not nearly as damaging to the thyroid.
     
  2. jyb

    jyb Member

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    I wonder about populations drinking very high amounts of green tea like Mate in South America. Do they adapt (better at filtering the toxin) or are they constantly hypothyroid? Those teas don't necessarily have high fluoride in comparison to other (green) teas, it depends on the source. But they'd still have the other things...
     
  3. OP
    haidut

    haidut Member

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    Is Mate a green tea? I was under the impression that it is a black/red tea. Also, the fluoride was given as a separate test to compare how inhibiting green tea is compared to known inhibitors like PTU and fluoride. As far as I know there is no fluoride in green tea beyond trace amounts.
     
  4. narouz

    narouz Member

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    No kidding.
    How stupid crap like fluoridation gets starts and keeps going...
    sheesh! :?:
     
  5. pboy

    pboy Member

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    I suspect any kind oh polyphenols /tannins are the same...that's why I think the whole thing about herbalism, while really cool and intricate...ultimately, isn't ideal. Basically they try to balance something by poisoning something else to counter balance it, and it never ends. Vegetables, leaves, most planty material is the same, other than very light things like iceberg lettuce or maybe some tender just budding flowers or shoots. All the stuff like circumin, EGCG, resveratrol, you name it..the whole gambit of natural herbal or 'antioxidant' things...seem to all be poisons in the end, to the liver if nothing else...or a burden, which then lowers thyroid. Certain things like mate, tea, cacao...well cacao is a lil different, cocoa ill say, mimick overcoming their toxic effect because of the dopamine increase and caffeine, theobromine but its always an erratic unstable energy, not the worst thing, but not pleasant either. I agree with Peat when he said to the degree the polyphenol is an 'antioxidant' is to the degree of its estrogenic activity. There are some substances like that that can have benefits over time if used on a fundamental personality outlook level, but you want to end up not needing them because they all irritate the intestine
     
  6. jyb

    jyb Member

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    Well, it looks very green to me, the dry leaves, the tea colour and the taste. I have a sample at home. From studies I read fluoride can be just as high in green tea as in black tea. I'm not sure why green tea has a better reputation for this.

    So my question remains...some populations drink absurd amounts of Mate by tradition, are they constantly hypothyroid or are there protective factors?
     
  7. Sheik

    Sheik Member

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    Maybe I'm not understanding, but T3 levels were suppressed by caffeine?
     
  8. OP
    haidut

    haidut Member

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    I am not an expert on Mate but it looks like it is not even related to Camelia Sinensis (the tea shrub).
    https://en.wikipedia.org/wiki/Mate_%28beverage%29
    https://en.wikipedia.org/wiki/Holly

    So, I don't think we can compare Mate drinkers to green tea drinkers, especially considering that Mate has a lot more caffeine than green tea. I think it's comparable to espresso in terms of caffeine content.
     
  9. BobbyDukes

    BobbyDukes Member

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    The only way tap water gets into my body is through showering, and through my coffee drinking.

    I guess I have been quite lazy in trying to find an alternative to tap water for the coffee. I went through a phase of trying to use boiled coconut water for my coffee instead, but the taste was beyond foul.

    If any UK Peaters have a good source for water, hit me up. Or, if anybody has any other ideas?
     
  10. jyb

    jyb Member

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    You are in the UK, why do you assume your tap water has fluoride? This is not as prevalent as the US...
     
  11. paymanz

    paymanz Member

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    use a reverse osmmosis purifying system?
     
  12. jyb

    jyb Member

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    Ok but I assumed Mate would have as much catechins. Otherwise, I didn't know there was a proper definition for green tea. I just notice that based on taste and colour, Mate seems like green tea - not white and not black.

    It is true that the beverage has more caffeine content, although I always assumed this was due to using more leaves. When you brew a Mate, you use like 10 times the volume of a standard tea bag so I would expect caffeine to be higher. Although the water used is not boiling, so less caffeine would be extracted.
     
  13. jyb

    jyb Member

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    Apparently it doesn't really remove fluoride. Google it.
     
  14. paymanz

    paymanz Member

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    this one shows it almost removes it:

    http://www.ncbi.nlm.nih.gov/pubmed/18408264
     
  15. mas

    mas Member

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    TOP 10 WAYS TO REDUCE FLUORIDE EXPOSURE
     
  16. mas

    mas Member

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  17. Kasper

    Kasper Member

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    so borax for the win ?
     
  18. burtlancast

    burtlancast Member

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    Black tea is green tea leaves left to age on the plant and accumulating more fluoride.
    Here's a fairly well know article about black tea having the most fluoride:

    http://poisonfluoride.com/pfpc/html/green_tea___.html

    Also,...

    And as far as avoiding fluoride, remember that even if you manage all the steps detailed above, fluoride accumulates up the food chain in the meat of animals, the flesh of fruits, etc...

    You will always end up with more fluoride if you live in America, or Australia, New zaeland,...
     
  19. BobbyDukes

    BobbyDukes Member

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    Hmmm. Not sure. I guess I have always assumed that the UK has as much fluoride as the US in its tap water. Why I have made that assumption is confusing, even to me. It would be brilliant if the tap water wasn't as bad as I'd originally thought. I should look into this really.
     
  20. Anonymous

    Anonymous Guest

    Is the fluoride from the water or the tea
     
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