<<...changing the urinary ph was thought to assist in avoiding kidney
stones.... Yet cranberries come in about halfway down the list at a  7.0.
Can anyone clarify or comment?>>

"Proanthocyanidins" found in blueberries and cranberries inhibit the binding
of certain, disease-causing strains of E. coli to cells taken from the
lining of the urinary tract which would promote flushing of bacteria from
the bladder into the urine stream, resulting in the prevention or reduction
of symptoms.
www.mercola.com/1998/oct/12/cranberry_compounds.htm

www.mercola.com/2001/jul/7/uti_cranberry_juice.htm

Rob