How do you reverse it?
And OP, how many fillings did you get?
It is said that there is specific bacteria causing the cavities and there are certain natural medications which can kill this bacteria.
It is also not normally found in the human mouth, from what I know.
So, first the bacteria needs to be killed off, the the cavities cleaned.
If you have a healthy diet, no vegetarianism or veganism bullshit your saliva will contain all the building blocks to repair your cavities naturally.
Your saliva for example contains calcium.
Which is why brushing teeth too often is stupid anyway.
You are literally brushing away the attempt of your body to repair itself.
Too much brushing is bad anyway.
Also, leave out all that sugary and bad stuff. After eating fruits, you should flush your mouth with water to get rid of the acid from the fruits.
The nore natural your diet is, rich in animal foods, the better
The less acidic food you consume the better.
I have only two small cavities, but those were caused because I have little space between my teeth.
Underdeveloped jaw and skull in general.
I may be able to correct that though.
In seven years the cavities have not gotten bigger, despite me rarely brushing my teeth.