Review (5/5): Works great, a little messy, but WORTH IT
This powder is very efficient and easy to use. Only downside is it's a bit messy, the powder can 'poof' into the sink and stain it if not washed away quickly. I use this once a week and/or a heavy day of drinking dark liquids and my teeth are much whiter. It removed a meh-color from years of drinking coffee, tea, and red wine. My teeth color was fine before, but now they're definitely more noticeably white. Highly recommend!!