I'd like to add my .02 about diet sodas:  in addition to leaching calcium
from the bones, the carbonic and phosporic acids (that make the fizz) also
destroy tooth enamel.  Nonsugared sodas are actually worse, because the
percentage of acid is higher than in sugary drinks (which promote bacterial
growth, increasing tooth decay as well...).  After teaching women's health
for 3 years, I've lost all craving for soda!

Carol