Bests & Worsts Reviews from Amazon

I was shopping for toothpaste that isn't a typical US overly flavored, too intense and unpleasant product when I came across this conspicuously expensive brand. I checked out the active ingredient and found abstracts from research showing positive results from the National Institutes of Health (and elsewhere). I read some more about home dental care and re-mineralization, about topical fluoride (no, there is no such thing as "fluoride burn"; that's the flavoring. I have a topical fluoride gel that's a very smooth and pleasant) and calcium carbonate. In the US, fluoride is regarded as the gold standard whereas in Japan it's nano hydroxyapatite. I had to try it-and no, not because I believe I'm being poisoned when I use fluoride topically. I don't swallow it, or I try not to. There are a lot of things that are perfectly safe to use as designed but not safe to swallow. I ended up doing a bit more reading-I can hardly call it research- because of some reviews like: - The toothpaste contains HCl. Yes, the active ingredient is precipitated with HCL, a process used in pharmaceuticals when the active ingredient is difficult (read "expensive") to crystallize. It's written as [active compound]•HCl and caused some people to believe the toothpaste contains hydrochloric acid, including one man earnestly explaining that it's stomach acid and will break down teeth rather than build them up. Yes, stomach acid is bad for teeth as people with bulimia or acid attest but, in all probability, the pH is what your mouth needs. -The research explains what "nano"means in this context yet some reviewers dismissed the product as useless because the word nano is used. I agree that "nano" is a currently overused and often meaningless word in the US, but in this case it's a description of the size of the particles, necessary to suspend, then redeposit on the final destination: the microtubules of the tooth enamel. -More than one person gave single star review because there are no English instructions included with the product that's made for the domestic Japanese market. Many of them stated they wouldn't trust putting something in their mouth if they didn't know what was in it. Even without knowing the ingredients, to reject it on those terms shows great distrust of the Japanese regulatory agencies, in this case, oversight of quasi-medical products. (Several customers had answered requests for ingredient lists so they're available.) -One woman stated she "threw (hers) in the trash" because the ingredients weren't listed in English. Again, more distrust of the Japanese regulatory agencies than I'd expect but also an apparent unwillingness to do any research at all. -A reviewer complained of the feeling of film on her teeth when using this product, something that didn't happen with her usual routine. It's possible the feeling was a sensation of the active ingredient, absorbing into her enamel microtubules. In other words, it may have been doing it's job and re-mineralizing her teeth. Because of these statements I wondered how hard it was to find English language information and it's almost disappointingly easy. Scanning the QR code in the package leaflet opened the company's website with an English link at the top but even without any information from the company, Googling "premio Apaguard" found plenty of information. Anyone who's worried about what's in it but has found they've ordered it for some reason should have their concerns put to rest after learning more about it. I've used it for a couple weeks. I like it, it tastes good without nasty over-flavoring and I think it's subtly helping my teeth become less sensitive. For some reason, some people thought it was all about whitening but it isn't. (Some whitening products can damage your enamel.) I don't expect a change overnight but I brush my teeth all the time so there's a lot of opportunity for it to work.