Both PAP and PAP+ are ingredients used for tooth whitening. Their full name is phthalimide peroxycaproic acid (phthalimidoperoxycaproic acid). They are non-peroxide whiteners that change the color of teeth by oxidizing stains on them.
The difference between PAP and PAP+ is that PAP+ adds potassium citrate and hydroxyapatite to PAP, thereby improving the whitening effect of PAP. It is reported that tooth whitening products using PAP+ can see visible results within 10 minutes, while products using PAP need at least 6 days to see the effect.
The advantage of tooth whitening products that use PAP or PAP+ is that they do not damage the enamel or cause tooth sensitivity like hydrogen peroxide or urea peroxide. They also don’t release harmful free radicals, but instead protect the outer layer and nerves of the tooth.
There are many brands of teeth whitening products that use PAP or PAP+, such as Hismile and Smile Avenue. They come in different forms of products such as whitening kits, whitening patches and mouthwashes