It did not hurt or cause my teeth to be overly sensitive. I love this and you need this in your life.
http://www.amazon.com/Whitening-Carbamide-Accelerator-Professional-Treatment/dp/B00UQOHOSQ/ref=aag_m_pw_dp?ie=UTF8&m=A2JOEA28TJA6HA
Disclosure: I received one or more of the products mentioned above in exchange for review from Giveaway Service website. Regardless, I only recommend products or services I use personally and believe will be good for my readers. Reference ID: pm1960b8912493f54222bd4aa1775caef3