Regarding glutamate, besides the typical magnesium, inositol, B6 etc, never forget:
-Zinc
-Taurine
-CoQ10
-B12
-Selenium
ncbi.nlm.nih.gov/pmc/articles/P…
mdpi.com/2072-6643/14/6…
ijbs.com/v12p0688.htm
pubmed.ncbi.nlm.nih.gov/7901032/
faseb.onlinelibrary.wiley.com/doi/epdf/10.10…
Also berberine is worth looking…