this post was submitted on 22 Nov 2024
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Science Memes

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[–] [email protected] 14 points 22 hours ago (14 children)

Fluoridated water doesn't seem to make a difference on cavities. It does have neurological effects. It's simply not acutely fatal. It's already in our toothpaste. We don't need it in our municipal water supply and the majority of developed countries don't.

https://www.hsph.harvard.edu/magazine/magazine_article/fluoridated-drinking-water/

[–] [email protected] 11 points 22 hours ago (4 children)

I appreciate that you put some reputable sources, rather than relying on a random tweet/post.

[–] [email protected] 12 points 21 hours ago

Keep in mind that they listed Canada as having non-flouride water, presumably based on the sole criteria that it's not a national requirement. The split between communities with and without flouride in their water varies wildly by province.

[–] [email protected] 8 points 21 hours ago

It's an opinion piece by a geneticist (so not a chemist or biologist or a field that could be related) and she ignores all the direct evidence that every city and county that added fluoride started having fewer cavities than neighboring areas that hadn't yet added it.

She then further points out that it only causes health issues in much higher concentrations than what the US was getting our water supply up to. You know, like literally anything that you get too much of is bad for you. You can literally die from drinking too much plain water. Too much of anything will kill you.

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[–] [email protected] 7 points 21 hours ago (5 children)

Your link is more or less an opinion piece from a geneticist, so this isn't even her field of study.

All her health issues she points out are for fluoride concentrations over triple the amount that tap water is brought up to.

The reason it's usage spread across the country was because while the entire country had access to things such as fluoridated toothpaste, counties and cities that started fluoridation of their water supplies consistently had fewer cavities than areas that didn't fluoridate the water. This alone outlines the glaringly obvious flaw in her argument.

Further still, while the US adds fluoride to the tap water in a concentration to reach 0.5mg to 0.7mg per liter of water (a couple drops per 50 gallons), natural drinking water for over 20% of the world is in concentrations well over that (to be clear, being well over that can cause health issues. Too much of anything can cause health issues.)

In other words, there is no evidence that this low concentration of fluoride causes health issues. There is loads of direct evidence that it reduces cavities. Plus, this woman from your opinion piece is talking out of her field. Not to mention that 21% of the world's drinking water supply naturally already falls within the recommended range of what the US takes theirs up to. It's just that most of the US water supply naturally falls below that amount.

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[–] [email protected] 6 points 20 hours ago

Only 3% of Quebec's population has access to fluoridated water and we have way more dental issues than any other province in Canada.

[–] [email protected] 6 points 21 hours ago

Interesting. The article doesn’t actually say that fluoridation in water supplies is dangerous but that some researchers are questioning. Generally code for lack of scientific evidence. It also finds that early studies may have had a flawed basis (pretty much all early studies have been found wanting by later scientists) but doesn’t refute the results.The study mentioned in the article talks about high levels of fluoridation which I assume is in lab tests however these levels are not the case in water supplies.

The correct way forward is more actual science based studies.

[–] [email protected] 5 points 21 hours ago

The bad part about Rfk jr is he probably mixes in some science with quackery. I honestly assumed all his ideas are insane. That's what's so hard about being discerning right now, you have to be on one side or the other.

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[–] [email protected] 6 points 20 hours ago (2 children)

but what about my precious bodily fluids?!?

[–] [email protected] 4 points 20 hours ago

"Have you ever seen a commie drink a glass of water?"

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[–] [email protected] 8 points 21 hours ago

Lemminologist here:

the fluoride levels vary because that’s how numbers do in reality

[–] [email protected] 6 points 20 hours ago (1 children)

But what about our precious bodily fluids?

[–] [email protected] 2 points 19 hours ago

I don't avoid women, Mandrake, but I do deny them my essence.

[–] [email protected] 8 points 23 hours ago

the people that need to hear this will never believe you.

[–] [email protected] 4 points 23 hours ago (6 children)

The question is: does it make sense to buy toothpaste with fluoride then or can I buy one without? Just because my kids don't like the peppermint ones and other flavours are most of the times without fluoride

[–] [email protected] 12 points 23 hours ago (1 children)

Non-fluoridated toothpaste is mainly for kids who are too young to be able to consistently spit it all out. The concentration of fluoride in toothpaste is high enough that you shouldn't be swallowing it, because doing that on the regular is harmful to your teeth. Gray discoloration is one of the first symptoms.

If your kids are capable of doing "rinse and spit," then they should be using fluoridated toothpaste.

[–] [email protected] 8 points 23 hours ago (1 children)

And even then, there's a significant safety margin worked into the advice that you shouldn't swallow toothpaste. You'd need to eat several tubes of prescription strength toothpaste to get sick from fluoride.

Still rinse and spit though

[–] [email protected] 3 points 23 hours ago (1 children)

Absolutely true - and I just remembered, even if your kids are little and using non-fluoridated toothpaste, you should still be using this time to teach them rinse and spit.

[–] [email protected] 3 points 22 hours ago* (last edited 22 hours ago) (1 children)

What is this rinse? You are supposed to leave the toothpaste on your teeth iirc. No water rinse.

Edit sorry realized this comes off harsh but not sure how to fix it. Lmao

[–] [email protected] 3 points 20 hours ago

With you having to judge millions of children, that you need to get high just to stay sane; you get a pass.

But there is a general recommendation to not eat or drink for 15-30min after brushing to give enough time for the fluoride to bind to any exposed enamel surfaces. It's also better to use a fluoridated mouthrinse over water, if getting the grittyness is what you're after.

[–] [email protected] 3 points 22 hours ago

Always buy flouride toothpaste.

[–] [email protected] 3 points 22 hours ago* (last edited 22 hours ago) (1 children)

Fluoridated toothpaste is more effective than drinking water. The fluoride works by direct contact with the enamel. Another reason it doesn't make sense to put it in drinking water.

[–] [email protected] 3 points 22 hours ago

Fluoride in the water is beneficial in the pre-eruptive phase (when teeth are still growing). Fluoride ingestion increases tooth resistence to cavities if the ingestion happened while they were growing.

This does mean that fluoride in water isn't really useful after you have all your permanent teeth though.

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[–] [email protected] 1 points 17 hours ago

Toxicology isn't a real profession. These people are run by big toxicity. For real water advice you want a homeopath.

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