The difference is that those foods are high in glutamate, not the chemically-stabilised for easy human sprinkling 'monosodium glutamate'.
I've long suspected any headaches or perceived ill-effects from MSG consumption are probably just sodium spikes from dishes made with a bit too much msg and salt, perhaps washed down with some not enirely quenching alcoholic beverage.
I've long suspected any headaches or perceived ill-effects from MSG consumption are probably just sodium spikes from dishes made with a bit too much msg and salt, perhaps washed down with some not enirely quenching alcoholic beverage.