Where can i buy 12% or higher, hydrogen peroxide for my teeth in canada specifically

[griffatcel]

I've been looking but I cant find anything over 8% and im trying to find 12 or higher

 

[manuIQ]

In Canada, 12% hydrogen peroxide isn’t usually sold directly for teeth. People typically get it as like a 40 volume hair developer from beauty supply stores, or through teeth whitening kits online that already contain similar strength gel. Dentists also use that strength in controlled trays, which is the safest option. Just be careful w high concentration peroxide bc it can burn gums and damage enamel if it’s not used properly. Best bet is to find one online ngnl.