Yes it does work, however you must be consistent, and do it at least once daily for (well, for my husband it took about 1 year). I was lazy. Just swish a small amount in your mouth for about a minute, it will foam, spit it out, then rinse your mouth. We know that it worked because when we saw family after about a year, everyone wanted to know what did he do to get his teeth so white. (He was /is a smoker, too). They gave him a nickname– "Bionic teeth"(?). That was about 10 years ago. before it was as popular. Still white. I'm working on it. True story.

Yes it whitens them…no dental experience…but real life experience doing it…

I never had good luck with liquid hydrogen peroxide–the 3% liquid kind in the bottle that you can also use to disinfect cuts. It didn't do much because it's basically a rinse and doesn't stay in contact with the teeth that long.

Instead, I had the dentist make wearable trays for me and used gel bleaching. You put the gel in the trays and wear them on your teeth, sometimes overnight and sometimes for just a half hour or so, depending on the particular type of gel you're using.

The carbamide peroxide (Opalescence) was good. It's all that some people need if their teeth are on the yellowish side. But mine were sort of grayish so I ended up using hydrogen peroxide gel (Day White). And that did the trick.

With the gels, you use them for several days as your dentist directs. Then you use them every 6 months or so for a touchup.

The first visit to get the trays made and a supply of gel was $250. After that I bought it online.

I also know people who have had good results with the Zoom light treatment, but that cost about $500 and can result in very sensitive gums for a few days.

Hope this helps.

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yes,it will work you can also mix with baking soda excellent together.