Re: fresh or aged urine for teeth whitening?

-if you consider that historically (going from memory, you can find it on wiki) pee was imported from Portugal to Rome for tooth care, it would be aged.

I use both in my dental care. Haven't noticed the whitening, but my teeth stain easily. However, I had almost no tartar on my teeth after nine months of no dental hygienist cleaning, and my gums are reportedly perfect, so something is working here.