Ethanol:
or alcohol is one of the causative agents for oral cancer. Especially, together with smoking.
If the herbal extracts are in alcohol (and they may not be) then this may be something to consider. There is quite a spectrum of opinions regarding alcohol consumption AC.
Still, I would avoid unnecessary consumption of high percentage alcohol. Having said this I do drink (and now enjoy again) an occasional glass of (cheap) wine.

>>In addition to vit D, just a multivitamin prep.

cheers!
M