This isn’t strictly true and it’s a sloppy article.
While MSG alone does not create a consistent response in all people, SOME people DO have issues with glutamate and glutamate has absolutely been indicated as playing a role in several diseases.
This can be true of many many vitamins and nutrients though - for example, some people with eg Wilson’s disease are sensitive to copper. They get so much copper it causes them to be ill. They therefore avoid copper in their diets. That does not mean copper is a problem for everyone, but we wouldn’t insist those people eat copper either.
This isn’t strictly true and it’s a sloppy article.
While MSG alone does not create a consistent response in all people, SOME people DO have issues with glutamate and glutamate has absolutely been indicated as playing a role in several diseases.
This can be true of many many vitamins and nutrients though - for example, some people with eg Wilson’s disease are sensitive to copper. They get so much copper it causes them to be ill. They therefore avoid copper in their diets. That does not mean copper is a problem for everyone, but we wouldn’t insist those people eat copper either.