Beyond Whitening did six weeks ago. His teeth I have dark, the end result I was pleased they began to 7 shades lighter razdnitsa notice everything! The procedure is not very pleasant, but there is no pain at all. After bleaching can forget about cigarettes, wine, tea, coffee, fat (do not know why), and of all that has a bright color such as tomatoes and so on. E. The first week, but if you want a long result then forget for a long time. Many people write that after the procedure taaaak teeth hurt that even tablets do not help, but I'm fine, do not hurt anything! If you are willing to make such sacrifices for the sake of beautiful teeth, you flag in hand, I'm from such spent an hour, but krasotiiiischa !!!