I saw a TV program which claimed to be disproving MSG allergies/reactions. The science in it was terrible, though - they served one of two meals to a bunch of people claiming allergies, one of which had artificial MSG added and the other, 'placebo' meal had a seaweed extract added which contained naturally occurring MSG. Then they proceeded to deride the people who showed allergic reactions to the "placebo" as fakers, despite it containing the exact chemical that they'd claimed a sensitivity to.
