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The median lethal dose (LD 50) is between 15 and 18 g/kg body weight in rats and mice, respectively, five times the LD 50 of table salt (3 g/kg in rats). The use of MSG as a food additive and the natural levels of glutamic acid in foods are not of toxic concern in humans. [ 20 ]
A new study reveals a shocking potential cause for insomnia.
There are two types of insomnia: short-term insomnia and chronic insomnia. Short-Term Insomnia Short-term insomnia is when you have trouble sleeping for a period of days or weeks.
The controversy surrounding the safety of MSG started with the publication of Robert Ho Man Kwok's correspondence letter titled "Chinese-Restaurant Syndrome" in the New England Journal of Medicine on 4 April 1968. [22] [23] In his letter, Kwok suggested several possible causes for symptoms that he experienced before he nominated MSG.
Insomnia can be grouped into primary and secondary, or comorbid, insomnia. [124] [125] [126] Primary insomnia is a sleep disorder not attributable to a medical, psychiatric, or environmental cause. [127] There are three main types of primary insomnia.
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Insomnia disorder (primary insomnia), chronic difficulty in falling asleep or maintaining sleep when no other cause is found for these symptoms. Insomnia can also be comorbid with or secondary to other disorders. Kleine–Levin syndrome, a rare disorder characterized by persistent episodic hypersomnia and cognitive or mood changes. [84]
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