News for hackers. Stuff that matters.
Re:Show HN: I invented a caffeinated toothpaste by BorgHunter on Thursday September 15, 2016 @01:07PM (#12507848)
> Power Toothpaste does not contain Fluoride. We know many of you don't want fluoride in your toothpaste.

This seems bizarre to me. People don't want fluoride in their toothpaste? Why not? Dentists seem pretty unanimous that everyone should brush twice a day with fluoride toothpaste.

Re:Show HN: I invented a caffeinated toothpaste by nappy on Thursday September 15, 2016 @01:31PM (#12508070)
I wrote a longer comment about this below, but the essential reason is: if I made fluoride a product requirement, I wouldn't have gotten to a release. It would have added a huge expense.

Additionally, fluoride is much more important for children. As enamel is forming, fluoride interacts with it and strengthens it. Adults need far less (threshold dose effect) and for most people in the United States, they likely get enough in the water. I also figure this is a toothpaste you'll use in the morning, and another fluoridated one in the evening. You can also use a fluoridated mouthwash.

At some point, I would love to introduce a fluoridated version.

Re:Show HN: I invented a caffeinated toothpaste by BorgHunter on Thursday September 15, 2016 @01:38PM (#12508139)
This is fair. I do think this should be a bit more prominent, though, because when I hear "toothpaste", I tend to assume it is fluoridated. Unfluoridated toothpaste is unusual enough that it should probably be called out right on the front of the box/tube, whereas right now it's kind of buried in a FAQ.

Good job getting this off the ground, and best of luck with it.

Re:Show HN: I invented a caffeinated toothpaste by nappy on Thursday September 15, 2016 @02:31PM (#12508559)
Much appreciated! Based on this comment and others from HN, I think I'm going to add a whole section for Formulation/Ingredients, show the full label, talk about the process etc. Thank you again!
Re:Show HN: I invented a caffeinated toothpaste by koytch on Thursday September 15, 2016 @06:00PM (#12510194)
As a guy living in Europe, it seems more logical to drink unfluoridated water and use fluoridated toothpaste, but that's America over there… Cool idea, for sure.
Re:Show HN: I invented a caffeinated toothpaste by jamiepenney on Thursday September 15, 2016 @06:28PM (#12510375)
For children, it works better in the water as you're trying to get flouride to the developing adult teeth rather than their baby teeth.
Re:Show HN: I invented a caffeinated toothpaste by koytch on Thursday September 15, 2016 @07:14PM (#12510641)
You may be right, but as I get it, the entire American population gets to drink fluoridated tap water, not only children. A stinking Commie plot, if I ever saw one.
Re:Show HN: I invented a caffeinated toothpaste by msane on Thursday September 15, 2016 @06:38PM (#12510449)
If that's the case you shouldn't misrepresent why you don't have fluoride
Re:Show HN: I invented a caffeinated toothpaste by PieterH on Thursday September 15, 2016 @05:01PM (#12509789)
If your formula is simple enough, listing it on the box might be good marketing.

I really like the idea of caffeinated toothpaste. It is simple & brilliant and I hope you succeed with this.

Re:Show HN: I invented a caffeinated toothpaste by ryandrake on Thursday September 15, 2016 @06:44PM (#12510490)
As someone with a kid, who lives in one of those towns where the crazies managed to prevent water fluoridation, I'm always looking at toothpastes to make sure they contain it.
Re:Show HN: I invented a caffeinated toothpaste by justinlardinois on Thursday September 15, 2016 @06:04PM (#12510215)
That's clever of you to spin the lack of fluoride as a benefit. It'll satisfy people who are paranoid about fluoride, and people who aren't probably don't care.
Re:Show HN: I invented a caffeinated toothpaste by msane on Thursday September 15, 2016 @06:43PM (#12510477)
Yay marketing! I feel inspired to remove expensive healthy ingredients from other products.
Re:Show HN: I invented a caffeinated toothpaste by bjterry on Thursday September 15, 2016 @09:39PM (#12511343)
Healthy ingredients have been removed from most foods, and for very similar reasons. It's not a product requirement for a burger bun to include wheat germ, for example, so it is removed to reduce cost and balance with other product requirements (eg lower cost, improved flavor, shelf stability).
Re:Show HN: I invented a caffeinated toothpaste by justinlardinois on Friday September 16, 2016 @03:55AM (#12512542)
If the alternative is not having a profit margin, why not?
Re:Show HN: I invented a caffeinated toothpaste by msane on Monday September 26, 2016 @11:21PM (#12587229)
Ethics?
Re:Show HN: I invented a caffeinated toothpaste by frozenport on Thursday September 15, 2016 @07:54PM (#12510869)
Could you do something clever like mix this isn't regular toothpaste? Perhaps by having a special dual tube, toothpaste holder?
Re:Show HN: I invented a caffeinated toothpaste by alexcabrera on Thursday September 15, 2016 @04:56PM (#12509741)
Do you realize that in addition to fluoridating water, there are studies underway to fluoridate salt, flour, fruit juices, soap, sugar, milk. Ice cream. Children's ice cream.

Fluoridation is the most monstrously conceived and dangerous Communist plot we have ever had to face. A foreign substance is introduced into our precious bodily fluids without the knowledge of the individual. Certainly without any choice. That's the way your hard-core Commie works.

Re:Show HN: I invented a caffeinated toothpaste by hooph00p on Thursday September 15, 2016 @04:58PM (#12509762)
What am I reading?
Re:Show HN: I invented a caffeinated toothpaste by pravda on Thursday September 15, 2016 @05:00PM (#12509786)
It's a Dr. Strangelove reference.[1]

[1]https://www.youtube.com/watch?v=X4XhhTF7vRM

Re:Show HN: I invented a caffeinated toothpaste by david-given on Friday September 16, 2016 @04:56AM (#12512719)
Apparently the Flouride Conspiracy Theory used in the film (go watch it, BTW; it's one of the best films of all time; and if you've already seen it, go watch it again) was based on actual real life:

https://news.google.com/newspapers?nid=1891&dat=19620321&id=...

Re:Show HN: I invented a caffeinated toothpaste by nohat on Thursday September 15, 2016 @11:56PM (#12511720)
Humorously the poster of that clip is apparently using it to argue for his conspiracy theory about fluoride.
Re:Show HN: I invented a caffeinated toothpaste by antisthenes on Thursday September 15, 2016 @05:00PM (#12509780)
A movie quote.
Re:Show HN: I invented a caffeinated toothpaste by tomca32 on Thursday September 15, 2016 @05:00PM (#12509779)
Not sure if you're sarcastic. If not, what does Communism have to do with anything?
Re:Show HN: I invented a caffeinated toothpaste by alexcabrera on Thursday September 15, 2016 @05:08PM (#12509845)
I can no longer sit back and allow Communist infiltration, Communist indoctrination, Communist subversion and the international Communist conspiracy to sap and impurify all of our precious bodily fluids.
Re:Show HN: I invented a caffeinated toothpaste by ganset on Thursday September 15, 2016 @05:29PM (#12509966)
Well at least you're committed.
Re:Show HN: I invented a caffeinated toothpaste by robhu on Thursday September 15, 2016 @05:34PM (#12510000)
He's quoting Dr Strangelove, these are all quotes from the (excellent) film.
Re:Show HN: I invented a caffeinated toothpaste by betenoire on Thursday September 15, 2016 @06:27PM (#12510364)
phew. That totally changes this from "dude..." to "added to list"
Re:Show HN: I invented a caffeinated toothpaste by jmspring on Thursday September 15, 2016 @11:13PM (#12511592)
Sadly, there are some that haven't seen the film.

A classic.

Re:Show HN: I invented a caffeinated toothpaste by jmspring on Thursday September 15, 2016 @11:14PM (#12511593)
That said, at least he isn't trying to get our POE.
Re:Show HN: I invented a caffeinated toothpaste by lamontcg on Thursday September 15, 2016 @11:19PM (#12511611)
You're going to have to answer to the Coca-Cola company.
Re:Show HN: I invented a caffeinated toothpaste by M_Grey on Friday September 16, 2016 @01:08AM (#12511971)
Uh, Jack, Jack, listen... tell me, tell me, Jack. When did you first... become... well, develop this theory?
Re:Show HN: I invented a caffeinated toothpaste by unfunco on Friday September 16, 2016 @02:07AM (#12512176)
Please don't let this place become reddit.
Re:Show HN: I invented a caffeinated toothpaste by M_Grey on Friday September 16, 2016 @11:05AM (#12514492)
I take your meaning, but that seems like a very unkind way of reinforcing what a basket full of downvotes already taught me.
Re:Show HN: I invented a caffeinated toothpaste by M_Grey on Friday September 16, 2016 @01:06AM (#12511966)
You should watch 'Dr. Strangelove'.
Re:Show HN: I invented a caffeinated toothpaste by jscottmiller on Thursday September 15, 2016 @01:28PM (#12508044)
Judging from this comment, the choice to remove fluoride seems to be a way to avoid additional FDA testing (including animal studies).

https://news.ycombinator.com/item?id=12507965

Re:Show HN: I invented a caffeinated toothpaste by Broken_Hippo on Thursday September 15, 2016 @03:14PM (#12508939)
Well, that is certainly a mountain of things to go through just for fluoride in toothpaste.

I find it amazing that only basic testing is needed for cosmetic products and something one is easily ingesting (slightly) on a day to day basis, but yet... fluoride requires animal testing?

I would think at this point, a simple chemical composition testing the fluorine levels would be appropriate enough. They obviously don't find the caffeine a threat enough to warrant such things in the product.

Re:Show HN: I invented a caffeinated toothpaste by msane on Thursday September 15, 2016 @06:49PM (#12510515)
Are you advocating for less testing on toothpaste or more testing on cosmetics...
Re:Show HN: I invented a caffeinated toothpaste by Broken_Hippo on Thursday September 15, 2016 @07:03PM (#12510590)
In a way, both, depending.

In the case of toothpaste, we've already tested fluoride. I'm going to guess we know the safe limits and the recommended amounts in the stuff. So as long as there isn't any new sorts of drug in the toothpaste and one is using pretty standard safe sort of ingredients, there isn't really a need for some of the testing - animal or human testing. Tests to verify the percentage of fluoride in the toothpaste? Absolutely. Getting the fluoride from verified sources? Sure thing. And so on.

Cosmetics have relatively few standards comparatively [1]. In a way, it seems to be enough. It likely isn't an issue with common ingredients - same situation as fluoride. But on the other hand, if a company uses a new ingredient, I'd rather have some sort of official tests for safety. I think this is probably especially important with things used around the eyes and lips - and I'm not sure some of the warning labels are quite enough. For example, some of the Halloween makeup will have warnings not to use certain colors around the eyes (usually black or red). Of course, this is in small print on the back of the package, and not on the container holding the makeup. Yet if you look at the package, it often has that very color near the eyes.

[1]http://www.fda.gov/Cosmetics/GuidanceRegulation/LawsRegulati...

Re:Show HN: I invented a caffeinated toothpaste by brenschluss on Friday September 16, 2016 @12:50AM (#12511910)
> So as long as there isn't any new sorts of drug in the toothpaste and one is using pretty standard safe sort of ingredients, there isn't really a need for some of the testing

This is probably exactly what the testing is for. Consider a drug that is (fluoride + X), where both fluoride and X are "already tested and safe". Are we sure that for all values for X, (fluoride + X) is safe also?

Re:Show HN: I invented a caffeinated toothpaste by Broken_Hippo on Friday September 16, 2016 @03:37AM (#12512491)
I certainly can't be sure - I don't know that much about fluoride itself and the limits that are on it nor exactly what research has been done. It seems the main concerns with fluoride is getting too much of it along with some environmental damage. I doubt testing for all values of x is prudent: simply the ingredients compared to the allowed amount of fluoride allowed (there is a limit in amount in the over the counter stuff). I'd think at minimum, he should be able to send a sample to the FDA or independent company for analysis to compare it with research already on file. Or be able to cross reference the ingredients himself. So long as his stuff is within the tested parameters, he'd be allowed to go ahead.

Of course, it might also be prudent to get certified to handle fluoride as well as manufacture toothpaste with it and other such things.

But then again, caffeine is a drug occasionally as well. Excedrine has to list it on their FDA required product information: No-Doz (caffeine pills) has the same sort of label. Granted, it might be more benign than fluoride - yet the FDA sees no problem with it being in toothpaste so long as he doesn't have the fluoride.

I don't know all the details, mostly because I've never wanted to manufacture toothpaste. But it seems there should be a simple way of doing this stuff with simple tests in most cases, and that the information should be easily accessible.

Re:Show HN: I invented a caffeinated toothpaste by lloyddobbler on Thursday September 15, 2016 @05:01PM (#12509795)
Yep. & at least in this case, the FDA involvement may have good reason. Fluoride is a poison, and detrimental effects manifest themselves in much lower dosages than caffeine.

http://emedicine.medscape.com/article/814774-overview

Re:Show HN: I invented a caffeinated toothpaste by choward on Thursday September 15, 2016 @05:59PM (#12510187)
Yeah. This stuck out to me too. $15 dollars for a tube of toothpaste that doesn't contain flouride? What am I paying for? I'll just buy my own caffeine powder and use real toothpaste that's only $2.
Re:Show HN: I invented a caffeinated toothpaste by nixy on Friday September 16, 2016 @04:53AM (#12512704)
What you're paying for is not having to buy and mix your own caffeine powder.
Re:Show HN: I invented a caffeinated toothpaste by zzalpha on Thursday September 15, 2016 @01:12PM (#12507896)
Yeah. Welcome to a world where beliefs are equivalent to facts. Even real life experiments like this:

http://www.cbc.ca/news/canada/calgary/tooth-decay-calgary-fl...

Are unlikely to dissuade folks given the echo chambers people are encouraged to live in today.

Re:Show HN: I invented a caffeinated toothpaste by HillRat on Thursday September 15, 2016 @11:58PM (#12511730)
Fluoridated toothpaste is, for regulatory purposes, a drug; caffeinated toothpaste is a food item. So this is just another way of saying, "We didn't want to deal with the regulatory burden."

But, man, one tube of this thing is roughly the LD50 for caffeine ingestion. This is definitely a "keep out of the reach of children" product.

Re:Show HN: I invented a caffeinated toothpaste by BMFX on Thursday September 15, 2016 @07:34PM (#12510747)
I actually have fluorosis... I was shoved Fluride growing up and the damage it has done to my teeth is serve, add in my poor college choices and I will be having full on implants before I turn 40.
Re:Show HN: I invented a caffeinated toothpaste by jimjimjim on Thursday September 15, 2016 @05:09PM (#12509858)
that's ok, i get enough fluoride from the chemtrails.
Re:Show HN: I invented a caffeinated toothpaste by dxbydt on Thursday September 15, 2016 @04:22PM (#12509502)
I don't. I always buy the non fluorinated toothpaste from Trader Joe's. Considering it is sold out 50% of the time, it is a pretty popular option.
Re:Show HN: I invented a caffeinated toothpaste by generic_user on Thursday September 15, 2016 @05:33PM (#12509993)
There seems to be some hardcore pro fluoride fanatics on here. Never the less I will stand by you with my no fluoride Tom's Toothpaste and fight the good fight.
Re:Show HN: I invented a caffeinated toothpaste by generic_user on Thursday September 15, 2016 @06:44PM (#12510484)
Down votes for no fluoride toothpaste? Good grief...
Re:Show HN: I invented a caffeinated toothpaste by drdeca on Thursday September 15, 2016 @07:28PM (#12510719)
I'm not sure, but I would guess that the "fight the good fight" part of the post might have contributed to the downvotes.

Just a guess though.

Re:Show HN: I invented a caffeinated toothpaste by generic_user on Thursday September 15, 2016 @07:43PM (#12510798)
Tips tinfoil hat in agreement from solar power tipi.
Re:Show HN: I invented a caffeinated toothpaste by generic_user on Thursday September 15, 2016 @07:24PM (#12510694)
I use to brush my teeth with salt for a year or two. Looks like I could probably start back up with a year or two supply for free and save some cash.
Re:Show HN: I invented a caffeinated toothpaste by Raphmedia on Thursday September 15, 2016 @01:15PM (#12507921)
The popular opinion is that we already get enough fluoride in our water.
Re:Show HN: I invented a caffeinated toothpaste by monknomo on Thursday September 15, 2016 @01:21PM (#12507993)
If you're lucky enough to live somewhere where the crazies haven't defluorinated your water because "you're polluting our pure water with chemicals..."
Re:Show HN: I invented a caffeinated toothpaste by coopermor1 on Thursday September 15, 2016 @01:42PM (#12508169)
Re:Show HN: I invented a caffeinated toothpaste by Drdrdrq on Thursday September 15, 2016 @02:14PM (#12508426)
Crazies or people who actually care about environment? Fluorinating water must be one of the least efficient ways of doing this.
Re:Show HN: I invented a caffeinated toothpaste by toomuchtodo on Thursday September 15, 2016 @04:30PM (#12509573)
If you'll coordinate an effort to get florinated products into the hands of everyone in the US who can't afford them, I'll agree with you.
Re:Show HN: I invented a caffeinated toothpaste by thatcat on Thursday September 15, 2016 @06:43PM (#12510475)
The reason foridation has additional FDA requirements is because it's essentially a medicine, not a food supplement like iodine - which is an essential nutrient. So to justify the medication of entire communities at the exact same dose of a non-essential pharmacological product in an effort to ensure poor people receive enough flouride seems misguided. Calcium has a similar hardening effect on teeth and is present in water already - forming the scale you see in the shower Ca(CO3). Additionally, flouride stains your teeth [0].

[0]https://en.wikipedia.org/wiki/Dental_fluorosis

Re:Show HN: I invented a caffeinated toothpaste by brassic on Thursday September 15, 2016 @10:02PM (#12511420)
Hard water has calcium and soft water doesn't. My city gets naturally soft water and we don't get scale. But we do get added fluoride.
Re:Show HN: I invented a caffeinated toothpaste by mod on Thursday September 15, 2016 @06:20PM (#12510328)
Like toothpaste? You actually think it's easier/cheaper to put it in the entire water supply vs handing out some free toothpaste?
Re:Show HN: I invented a caffeinated toothpaste by Retra on Thursday September 15, 2016 @07:42PM (#12510790)
Toothpaste isn't free. Producing toothpaste, putting flouride in it, and distributing it are all harder than putting fluoride in water and distributing it. Water is pumped to people's houses from central locations. Toothpaste has to be placed in tubes and shipped around on boats and trucks.
Re:Show HN: I invented a caffeinated toothpaste by schwap on Thursday September 15, 2016 @07:16PM (#12510653)
> Crazies or people who actually care about environment?

The environment???

Fluoride, like many minerals, is naturally occurring in many water sources, just not (all) of the ones that are used for drinking water. Additionally, the concentration of fluoride for this purpose is minuscule (0.7 mg/L according to Health Canada).

Re:Show HN: I invented a caffeinated toothpaste by DiabloD3 on Friday September 16, 2016 @12:23PM (#12515108)
This comment is why you absolutely must test well water every 2-3 years.

Up here in Maine we have a pretty bad fluoride issue in some areas, and a lot of people are not testing their well water, and ending up with fluoride poisoning.

Re:Show HN: I invented a caffeinated toothpaste by 2AF3 on Thursday September 15, 2016 @02:49PM (#12508717)
It's not the role of government to brush my teeth.
Re:Show HN: I invented a caffeinated toothpaste by bduerst on Thursday September 15, 2016 @07:13PM (#12510637)
It is when tooth decay is a major public health concern.
Re:Show HN: I invented a caffeinated toothpaste by kakarot on Thursday September 15, 2016 @08:09PM (#12510964)
Actually no, it still isn't.
Re:Show HN: I invented a caffeinated toothpaste by dx034 on Friday September 16, 2016 @10:19AM (#12514156)
I think it is, not for you but for your children. Too many parents don't take proper care of their children's teeth and this can cause non-reversible damages. Adding flouride is not the perfect solution but it can help to some degree.
Re:Show HN: I invented a caffeinated toothpaste by kakarot on Friday September 16, 2016 @03:20PM (#12516562)
The problem is a combination of sugar over-consumption and bad dental hygiene. Those are the issues that need to be addressed. Adding flouride to our drinking supply does not address these issues.
Re:Show HN: I invented a caffeinated toothpaste by freehunter on Friday September 16, 2016 @12:27PM (#12515147)
If you can't afford insurance, the government makes sure you get the health care you need to stay alive and healthy. So the government has a vested interest in making sure people stay healthy, because if a poor person gets sick, the government is paying for their healthcare. Not everyone brushes their teeth, not everyone can afford toothpaste. Everyone has to drink water, though, and fluoride in water causes no real health problems. It's a very quick win for public health, because otherwise the government would be paying to replace poor people's teeth.
Re:Show HN: I invented a caffeinated toothpaste by kakarot on Friday September 16, 2016 @03:30PM (#12516636)
What government are you talking about?

Until recently I couldn't avoid government insurance here in America, and the IRS penalizes me monthly for it at a rate higher than the cost of subsidized insurance.

And flouride in your water doesn't replace toothpaste. Are you seriously trying to tell me if I don't brush but drink enough water a day, without changing my sugar consumption and after-meal rinsing habits, that my gums will stay healthy? I don't think you really know what you're talking about.

Re:Show HN: I invented a caffeinated toothpaste by bduerst on Friday September 16, 2016 @01:26PM (#12515656)
- Worldwide, 60–90% of school children and nearly 100% of adults have dental cavities.

- Dental cavities can be prevented by maintaining a constant low level of fluoride in the oral cavity.

http://www.who.int/mediacentre/factsheets/fs318/en/

It doesn't seem like it's an issue to you, personally, because we have flourinated water.

Re:Show HN: I invented a caffeinated toothpaste by kakarot on Friday September 16, 2016 @03:27PM (#12516608)
I have two abcesses and a cavity. So this is very much an issue to me. My dental problems were caused by weak enamel and losing access to proper dental care.

As a child, I used to get nauseated after brushing my teeth and formed a physical aversion I had to overcome daily. After discovering flouride-free toothpaste a few years ago, I stopped feeling sick after brushing. It's possible I have an underactive thyroid but I haven't sought a real diagnoses.

Putting flouride in our tap doesn't solve sugar over-consumption or bad dental care. And it possibly aggravates hyperthyroidism in some people, though I don't know of any conclusive studies.

Re:Show HN: I invented a caffeinated toothpaste by bduerst on Friday September 16, 2016 @07:06PM (#12518025)
>doesn't solve sugar over-consumption or bad dental care

I though you just said that tooth decay isn't still a public health concern, now it is?

Are you saying the WHO is wrong? Based on what evidence?

Re:Show HN: I invented a caffeinated toothpaste by kakarot on Saturday September 17, 2016 @11:53AM (#12520996)
I never said that?

Don't hijack my argument into something else.

I said it wasn't the government's responsibility to flouridate my drinking water. That isn't what I pay taxes for.

Re:Show HN: I invented a caffeinated toothpaste by bduerst on Sunday September 18, 2016 @03:04AM (#12524275)
>Actually no, it still isn't.

^ Is what you really said, which didn't make sense even in context.

You pay taxes for what your democratically elected representatives determine it's for, not what you personally think - and like the WHO, they think some of it should be marginally spent on solving major public health concerns.

Re:Show HN: I invented a caffeinated toothpaste by kakarot on Monday September 19, 2016 @03:17PM (#12533938)
It isn't my government's responsibility. Didn't say it wasn't an important issue.

The idea that democratic elections are functioning in a representative way in America is a joke. I have no control over many policies that govern me. But I still reserve the right to decide what I think are worthwhile tax expenditures. Your same logic would invalidate the gross overspending of taxes towards my government's defense budget.

Re:Show HN: I invented a caffeinated toothpaste by bduerst on Monday September 19, 2016 @06:57PM (#12535470)
So major public health concerns are not the government's responsibility?

At least you understand saying, "That's not what I pay taxes for" is a moot argument then.

Re:Show HN: I invented a caffeinated toothpaste by BorgHunter on Thursday September 15, 2016 @01:28PM (#12508042)
If this is true, then I must be really out of touch. No one has expressed that opinion to me, nor have I seen it on Facebook in my News Feed (and I do occasionally see woo-woo stuff there). And I've certainly never heard a dentist say that. I'm not surprised that there are people who make this claim, but I would never have considered it "the popular opinion", or even a popular opinion.
Re:Show HN: I invented a caffeinated toothpaste by reportingsjr on Thursday September 15, 2016 @01:40PM (#12508151)
The US Dept of Health and Human Services actually halved their recommendation for fluoride in water about six months ago. The reasoning is apparently that people in the US now get enough from other sources such as toothpaste, mouth washes, etc [1].

Note that they didn't /remove/ the recommendation for fluoride in water. They just reduced the recommended amount.

1: http://www.npr.org/sections/health-shots/2015/04/27/40257994...

Re:Show HN: I invented a caffeinated toothpaste by nappy on Thursday September 15, 2016 @02:31PM (#12508563)
Getting too much fluoride is something that can occur as well: https://en.wikipedia.org/wiki/Dental_fluorosis
Re:Show HN: I invented a caffeinated toothpaste by reportingsjr on Thursday September 15, 2016 @05:55PM (#12510167)
I am all too aware as I have mild fluorosis in some of my teeth! Although I think the biggest cause of this was semi regular fluoride rinses at the dentist when I was a kid.
Re:Show HN: I invented a caffeinated toothpaste by nikolay on Thursday September 15, 2016 @01:44PM (#12508182)
It's the most stupid thing, though. We also shower and cook with this water.
Re:Show HN: I invented a caffeinated toothpaste by tclancy on Thursday September 15, 2016 @04:10PM (#12509418)
Agreed. It's sapping our precious bodily fluids. https://www.youtube.com/watch?v=Qr2bSL5VQgM
Re:Show HN: I invented a caffeinated toothpaste by nikolay on Thursday September 15, 2016 @05:00PM (#12509782)
Well, if you're okay with putting excess amounts of chemicals on your skin that are targeting your teeth although you may get enough from green tea, I'm not, and many others aren't either. I bought a chlorine filter for my shower, and all my dandruff and skin itching issues have disappeared, so, call it a conspiracy theory or whatever, but you can't beat the facts.
Re:Show HN: I invented a caffeinated toothpaste by zyxley on Thursday September 15, 2016 @07:49PM (#12510832)
Anecdotes are not data.
Re:Show HN: I invented a caffeinated toothpaste by nikolay on Thursday September 15, 2016 @08:15PM (#12511006)
I'm not a computer; I'm a human being, and I apply heuristics all the time. Maybe you're not. Anyway, data can be forged, and has been forged numerous times driven by corporate and political interest.

What I do works for me, and works well - I look for fluoride-free products - you can stick with using agricultural waste in your water supply, but I stay off it!

Re:Show HN: I invented a caffeinated toothpaste by Broken_Hippo on Thursday September 15, 2016 @01:23PM (#12508015)
I don't think my water has fluoride, though.
Re:Show HN: I invented a caffeinated toothpaste by knicholes on Thursday September 15, 2016 @01:34PM (#12508103)
https://nccd.cdc.gov/DOH_MWF/Default/Default.aspx will tell you whether or not your water source should/shouldn't be flouridated if you live in the US.
Re:Show HN: I invented a caffeinated toothpaste by Broken_Hippo on Thursday September 15, 2016 @03:08PM (#12508889)
Thanks ... but I live in Norway. I'm not sure any of the water is fluoridated here. In the states, however, everywhere I lived had fluoride in the water.
Re:Show HN: I invented a caffeinated toothpaste by ptaipale on Friday September 16, 2016 @01:18AM (#12511998)
Water is fluoridated in Norway if it needs be, i.e. the fluoride content of drinking water is moderated so that it is between 0.7 and 1.2 mg/l (i.e. around one part per million).

https://sml.snl.no/fluoridering

Re:Show HN: I invented a caffeinated toothpaste by drakonandor on Thursday September 15, 2016 @04:43PM (#12509664)
Water often has some levels of fluoride naturally.
Re:Show HN: I invented a caffeinated toothpaste by ptaipale on Friday September 16, 2016 @03:28AM (#12512463)
Yes, and it always has had - one would expect that during the human evolution, the human body developed to expect and utilize variable levels of fluoride in drinking water.

Nowadays we consume processed water which is clear of many impurities and tends to come just one source. The quality is extremely consistent, so we don't die of poisonings and contaminations. But then, the selection of where our drinking water comes from, and the purification processes may have the impact that the fluoride level is consistently lower than is good. Hence the possible need to add fluoride to water.

Re:Show HN: I invented a caffeinated toothpaste by nikolay on Thursday September 15, 2016 @01:37PM (#12508129)
If I regularly drink green tea, I don't need extra fluoride.