I 100% believe that MSG is not a problem for the general population. I also 100% believe that some (apparently not huge) number of people have a very real reaction to it.
My son, now 4 3/4 and apparently having outgrown it, used to be an absolutely infallible MSG detector from birth to about age 3. If I ate something with MSG in it (before he was fully weaned at 18 months), or if *he* ate something with MSG in it, he would start behaving oddly in a very very distinct and repeatable fashion. For 8-12ish hrs after eating the food (or nursing, if it was something I ate) he would experience very rapid extreme mood swings, from crazy hysterical activity to sudden outbursts of tears to screaming to just sitting there in a lump, usually very rapidly alternating (like 5 minutes of one, 2 minutes of another, 4 minutes of another one, etc).
I am
positive this was from MSG; it happened only when we'd eaten stuff with MSG and never when we hadn't. I mean SERIOUSLY only and never. In fact I learned about a number of foods containing MSG that I had never previously thought it was in, because sometimes I'd think we were eating carefully enough but he'd flip out and I'd go back and read labels or look further into what some named ingredient really contains and dammit if it didn't have MSG after all. He was really a SCARY-accurate detector of it
Fortunately he's outgrown it and his younger brother does not have the same problem, although I suspect occasional high-MSG meals of making him a little bit poor sleeping that night. (But I am not sure of this, especially as I have no way of knowing the actual amount of MSG in different things).
The problem with large studies is that they can't find uncommon individual idiosyncrasies. For most purposes that is fine, large studies are a GOOD thing
, but normal study design is not set up to find out whether a few people are really constitutively different in their response.
That said, I wholeheartedly agree that there is a list of food ingredients and environmental chemical exposures as long as both an orangutan's arms that are FAR bigger worries than MSG, and that people are MASSIVELY too cavalier about.
JMHO,
Pat, not a toxicologist or environmental chemist but hung out with enough over the years, and on enough Masters degree committees in that sort of field, to have a healthy respect for what complex molecules can do when you're not paying attention.