DeepDish
When my first started hurting while brushing last week around day 4/5 of my MC, I did a search on CureZone for teeth and master cleanse.
I have found several postings in the past, but none recently about people concern about thier teeth.
Yes, lemon becomes alkaline, but I believe that happens after/during the digestive process, in your mouth it is probably still acidic.
I am just guessing though.
Regardless, I now have three teeth that were fine 13 days ago.
I believe in the MC.
I just plan on doing a lot of rinsing with water after each drink.