Teeth whitening 'scams'..... very scary

[Dave7]

not only lips

Not sure what you mean.
PM me with some photos so I understand

 

[Dave7]

I blame Simon Cowel... teeth so white and perfect that they look more false than actual false teeth. I like natural things to look natural. The Queen Mother had perfect teeth.

Jurgen Klopp ??

 

[DRM]

This "White Teeth" phenomenon seems to have started in the good Ol' US of A, as seen on Friends, decades ago

 

[Profpointy]

I did think that, but I was unsure about the numbers. I remember at school for some reason we added H2O2 (no idea of the concentration) to animal blood, and got lots of red foam. Quite what the point of that experiment was I have long since forgotten.

(Edit. It's come to me. Peroxidase enzyme was the subject of the experiment)

"everyday" H2O2 is often labelled 10 volumes or 20 volumes; this being the multiple of the original volume liberated as oxygen when it breaks down. This is the stuff you might dab on a cut; albeit of questionable medical value. 20 vol is I think about 6%