Given that bone weight and Ca concentration in bone ash
were affected by benzoic acid, a change in bone resorption
induced to buffer the increase in acid absorption is likely.
If
one considers that the normal resorption of AA from the
glomerular filtrate is associated with cotransport of Na, a
conjugation of free glycine with benzoic acid may have
indirectly increased Na excretion in urine of the pigs fed the
benzoic acid-containing diets.