<<Disclaimer: Verify this information before applying it to your situation.>>

Two responses were received regarding whether anyone had tried the
Nupro-Gold teeth whitening treatments for whitening teeth.

Again, the company Dentsply (1-800-989-8825) did verified that the
bleaching solution is g-f.

One stated he had used the Nupro-Gold treatment with no problems.  He
used it daily for 2 weeks then once or twice a month thereafter for two
hours at a time.  He said using it overnight could  cause temporary
sensitivity and pain.  He also said, according to his dentist, after two
hours you get no additional benefit.  It improved his teeth a lot but
not to the point where he would call them white.

The other person who responded used a different brand (Nite White Excel2
from Discus Dental) and said his teeth were significantly whitened.  He
did the treatment five or six nights but  had to remove the trays two
times in the middle of the night because the bleach made his tongue
uncomfortable.

Hope this information is helpful to others.

Mary Anne