I stumbled upon this article after reading some more recent commentary on MSG [0], in which the author wrote:

"There’s no evidence to substantiate the claim that MSG causes ill effects in most people who consume it. A minority of people are hypersensitive to glutamate and MSG in food—added or natural—and in a study where MSG was given at 3 grams, in the absence of food, sensitive individuals had short-term, transient adverse reactions."

[0] https://peterattiamd.com/should-we-still-be-worried-about-ms...