only after use wow [SEP] i was very skeptical about the charcoal teeth whitening thing i decided to try it though and i was blown away by results i am an avid coffee drinker and i smoke every once in a while so my teeth tend to stay yellow unfortunately it is a terrible mess in my sink but its so worth it this picture was my first try at the charcoal stuff instant results it will leave your gums a little tender so do not brush vigorously like normal toothpaste i use the charcoal stuff for minutes wash it out with water brush my teeth then use mouth wash i would definitely recommend this to my coworkers and friends however if you still drink coffee everyday the whitening will not stay if you give up smoking or tinted drinks you will fall in love with the long term results