pH Balance

Went researching some of the labels on the blood test results and came across this interesting article (and comments, always gotta read the comments).
I know I sell a greens powder so should be promoting the hell out of alkalising foods. But even if it does not suit my sales efforts, I believe that promoting truth is more important. This is an interesting read on the subject of acid versus alkaline foods.
http://sciencebasedpharmacy.wordpress.com/2009/11/13/your-urine-is-not-a-window-to-your-body-ph-balancing-a-failed-hypothesis/