This is a great talk about your brain, https://www.youtube.com/watch?v=tTSvlGniHok
This is a great summary of this information.
This 2004 article has advice on defending against excitotoxins, although I seriously question the amino acid suggestion.
- Glutamic Acid
- Anything glutmate (Monopotassium glutamate, magnesium diglutamate, etc)
- Hydrolyzed anything, (Hydrolyzed vegetable protein, hydrolyzed soy protein, etc)
- Vegetable protein
- Textured protein
- Plant protein
- Autolyzed anything (Autolyzed plant protein, autolyzed yeast extract, etc)
- Yeast extract
- Malt extract
- Soy Sauce Extract
- Yeast nutrient
- Sodium Cyclamate