This article is very long and having skimmed it I'm still not entirely sure: is monosodium glutamate unhealthy or not after all?
It's an amusing tale, but rather unsettling how easily fooled we can be. I remember (growing up as late as the '80s) people legitimately wondering whether an MSG allergy was responsible for their loaginess and fatigue. A number of tv news programs like 20/20 ran cover stories about it. To hear it was all bunk is a sobering reminder to take what we read with a grain of salt. Even much of the hysteria surrounding coronavirus and the like.
I don't have an answer to this, but these publications take a serious long term credibility hit with stories like these. And rightfully so.