I found this on the internet a few weeks ago. I have thinning enamel on my teeth so they are sensitive, commercial whiteners are too harsh for me and I can’t afford unnecessary dental care so thought I would try this, I have tried it several times….I’m sold!! This is effective, very gentle on teeth and gums and costs just a few cents each time. The only drawback is that it is messy to use and will stain anything it falls on so care needs to be used to guard against this. You will need to use an old toothbrush as it stains them.
Mix 3/4 teaspoon turmeric with a very little amount of warm water, just enough to make a stiff paste. Brush teeth for one minute or so, holding an old towel under your mouth to catch any dripping. Rinse mouth out and clean with toothpaste as normal.
There is a video here which I watched before using it, from Secrets of Longevity.com http://www.youtube.com/watch?v=ffYTPtnA1yk This is the before and after photos he uses.