After using the gels & pens how long does the whiter color last & when you need more where would you buy the treatments & how much would they cost?
suzanne p. asked on Nov 14, 2012
It depends on your oral habbits. If you drink a lot of tea or coffee you may need to touch up every 3-4 months. We sell refills at www.smilesciences.com they cost $49
Deanna G. from Merchant replied on Nov 14, 2012