I know that Zoom usually takes about (4) 15 min sessions to be effective correct? Does this include all sessions or just one session??
Carolyn B. asked on Dec 11, 2012
With the Groupon, the 20-minute process is repeated two to three times (a total of 40-60 minutes) for optimal whitening results, which can whiten teeth up to 8 shades.
Brette V. from Groupon replied on Dec 12, 2012