Next time show them this:
http://www.cornucopia.org/2008/01/replacing-mother-infant-formula-report/
Oh by the way, did you know a couple of decades ago around the time when you and I were born, doctors were so sure formula is so much more better than mother's milk...
Looks like in the last few 10's of years, in lieu of the millions of years of human evolution; there has been a marked improvement in the quality of mom's milk ... after all, how can a doctor's theory based on 'scientific research' go wrong?? LOL
Cheers,
Deepti