In the offical Simpsons Comic
(edition with The Homer Show
on the front cover), the cover story contains a scene where Homer
goes into the Kwik-E-Mart
and buys lots of stuff. One of the packets of 'stuff' is called "Monosodium Glutimunchies". Obviously doesn't sound too healthy.
Similiar to the episode of the Simpsons where Bart's bones have become brittle because he's been drinking refreshing "Malk" (with added Vitamin R).