As a coincidence I had a dentist appt this am and asked my dentist about the 1.23 Ion and he said it's really meant for kids as the acid etches their teeth and allows the fluoride to bond better but he does not recommend it long term for adults as it will etch the tops of your teeth and damage the enamel. He also said that with the etching will come the possibility of staining. He did say despite all this it is better than nothing for your circumstances.

I also sent you a PM.

David

Age 58 at Dx, HPV16+ SCC, Stage IV BOT+2 nodes, non smoker, casual drinker, exercise nut, Cisplatin x 3 & concurrent IMRT x 35,(70 Gy), no surgery, no Peg, Tx at Moffitt over Aug 06. Jun 07, back to riding my bike 100 miles a wk. Now doing 12 Spin classes and 60 outdoor miles per wk. Nov 13 completed Hilly Century ride for Cancer, 104 miles, 1st Place in my age group. Apr 2014 & 15, Spun for 9 straight hrs to raise $$ for YMCA's Livestrong Program. Certified Spin Instructor Jun 2014.