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Good research! And what you found compliments this study from 2013 -- before covid-19. These researchers found that coronavirus infections may alter the "regulation of glutamate release and uptake," leading to excitotoxicity and damage and death of neurons. I wrote to the authors in 2020 and asked if they thought a Covid-19 infection might have the same effects. One wrote back and said yes, Covid-19 "could do the same in neuronal cells that are infected." Glutamate is certainly involved in coronavirus infections. Here's a link to the 2013 study: https://www.researchgate.net/publication/243457712_Human_coronavirus_respiratory_pathogens_revisited_as_infectious_neuroinvasive_neurotropic_and_neurovirulent_agents

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Interesting post, thank you. I found out in 2020 that the industrial monosodium glutamate sometimes uses ammonia in refining process. I surmised that residues of this would cause disease issues due to the excess nitrogen ions. I wrote about this briefly in this post of mine on sodium nitrite.

https://baldmichael.substack.com/p/sodium-nitrite-e250-the-poison-in

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