Review title is Yes - this powder whitens....but [SEP] This product actually does whiten teeth.  If it doesn't - you haven't been to a dentist in a while!  I see a few people complain that it doesn't work, but you have to consider....It took quite a while for your teeth to get discolored - months, or even years.  You can't expect anything ( even dentist whitening) to whiten your teeth over night. A dentist whitening has you come back several times - depending on how white you want.  It will take weeks, even months using this to get your teeth close to white, but if you use this every day - you will see a difference.  One more thing - instructions tell you to wet the tooth brush and dab it in the powder.  What they do not instruct is if the powder in the container gets wet - mold will begin to grow on it.  This happened with my first order.  Now, I put a small amount of powder on the outside top of the lid, dab with a wet brush, then throw the small amount left away.  You can gauge the amount of powder needed for one use, so you don't waste too much.