Either you didn’t read the article, or you’re blatantly ignoring that we don’t understand the long term implications of having this bacteria in your mouth and gut microbiome.
There may be no problems at all… but we don’t know. This is why FDA regulations exist. The product being sold in Prospera to skirt regulations should be a red flag anyway.
I’m not saying that it can’t or won’t work. I’m saying, be careful. If you can prevent cavities by brushing with fluoridated toothpaste and flossing, why would you adopt a potential risk that could affect your health?
1. infecting yourself with this bacteria may not do what it is marketed to do
2. may result in suppression of beneficial microbiota
3. is not safe against lateral acquisition of a gene that is beneficial to the microbe but pathogenic to the human host
4. there is no real kill switch
for a lot of money, you might just end up buying a lot of health issues.