With No bleach or abrasives: The whitening toothpastes Black Is White and White Is Black remove discolouration the gentle way: activated carbon simply absorbs discolouration particles. Plus: this toothpaste even improves your oral health. Enzymes support the functions of saliva, while hydroxylapatite remineralises enamel and closes dentine channels. All without harmful substances like SLS and triclosan. Yep, naturally impressive.