Plus White 5 Minute Speed Whitening Gel, Sensitive Teeth, 3-Ounce Tube (Pack of 3)

My husband has used this product for years with good results for coffee stained teeth, etc. I have tried it, but it hurts my sensitive teeth so I use Listerine Whitening strips instead.

...but this REALLY worked! I purchased it for my dad, (78yrs.) his teeth have acquired a yellow tinge over the years. He thinks it's too *froo~froo* to go anywhere to get them whitened...so I thought we (while visiting) could try this out together. My visit was 2 weeks, and we both had great results! I bought some sport mouth guards at Wal-Mart (99cents) and we used the paste mornings and evenings, 5 minutes. Viola!

I like it, I initially put it on for 5 minutes and didn't see a vast improvement but upon further reading of the bottle label it says 20 minutes for harsher stains. if you leave it on the full 20 minutes you will definitely see a difference.. like most whiteners you see a difference for a few days and then back to normal.. it seems to be a more of a temporary white which I guess is good if you are going out.. but if you want to see more permanent changes I'd suggest professional whitening.
Still a good product though. It's a clear gel and turns kinda foamy. If you concentrate the gel on the more visible teeth just coat it good, wait 20 minutes and rinse.