O2 = Oxygen
Brushing your teeth with Baking Soda is a very good idea because you cannot swallow any flouride or other chemicals. I found an old tube of Colgate Total in the guest bathroom.
the Inactive Ingredients are
hydrated silica
glycerin
sorbitol
flavor,
PVM/MA
copolymer
sodium lauryl sulfate
cellose gum
sodium hydroxide
proplyene glycol
carrageenan
sodium sacharin
mica
titanium dioxide
FD&C blue no.1
D&C yellow no.10
Exactly what is meant by the “inactive ingrediants” term I don’t know but since the area under your tongue is the most porous place on your body if you have your underwear on. Myself, I don’t want all these chemicals being absorbed into my system when I brush my teeth.
the Active Ingredients are
Sodium flouride
Triclosan
All of which you nor I consume twice a day.