You Are What You Eat

In Torah Tavlin I read, the Rambam in Moreh Nevuchim says that the foods that we are not allowed to eat are not only spiritually impure, but are harmful to the body.  The Rashbam brings a proof for this from the Gemara in Shabbos 86b that gentiles who eat these foods have a different physical makeup than Jews.

Very interestingly, the Chasam Sofer (YD 158) says, based on this Gemara, that while non-Jewish doctors have ne'emanus (you can rely on them), nevertheless all their research is based on the biology of non-Jews, which is not like ours because of their different dietary habits.  Therefore, their medical conclusions do not necessarily apply to Jews!