The researchers added that there was “a significant additive interaction between [being] overweight and MSG intake in relation to snoring and SDB.”
However, the study is not an air-tight one, and the findings are limited because the study used self-reported sleep data instead of the more valid polysomnographic method to confirm the diagnosis of SDB. Another limitation was that the measurement of MSG consumption may have under or overestimated MSG intake.
Nonetheless, probably a good idea to minimize consumption of food additives. So I leave you with this fun video a friend sent...sorta relevant to this post.
Source: Association between monosodium glutamate intake and sleep-disordered breathing among Chinese adults with normal body weight
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