Nite White Excel is carbomide peroxide whitening gel.
Basting RT, Rodrigues AL Jr, Serra MC.
The effects of seven carbamide peroxide bleaching agents on enamel microhardness over time. (J Am Dent Assoc. 2003 Oct;134(10):1335-42.)
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Li Y, Lee SS, Cartwright SL, Wilson AC.
Comparison of clinical efficacy and safety of three professional at-home tooth whitening systems. (Compend Contin Educ Dent. 2003 May;24(5):357-60, 362, 364 passim; quiz 378.)
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