Apple cider vinegar is my go-to all-purpose nostrum.
Great for sore throat when diluted about an ounce in eight ounces of fruit juice, tea or whatever.
It will bring tears to your eyes, and you make the most awful facial wince, but cough and soreness gown within hours. Regular vinegar is not nearly so effective.
I have really bad calculus/tartar on one tooth because I cant chew due to a fractured tooth below it that needs to be pulled but have been putting it off
Supposedly internet says apple cider vinegar can help dissolve it
I dont trust it. probably take my enamel too