This article is from the Solid Food for Infants FAQ, by David M. Poduska firstname.lastname@example.org with numerous contributions by others.
From: Paula Burch <email@example.com>
When most of the readers of misc.kids were small, the fashion was to feed
solid food (actually mush) to very young babies, even those as young as
two weeks. Now research has shown that there are several reasons to delay
introducing supplemental foods until quite a bit later. The reasons to
avoid introducing supplemental foods early range from the simple fact that
tiny babies cannot digest complex foods or starches well to the serious
though small risk of developing food allergies or even diabetes.