system
Given the following post, respond as if you're commenting on Reddit:
human
How safe can monosodium glutamate actually be if it's an excitotoxin?

Normally I'm one to ignore the fads of calling foods unsafe because of one flawed study or something like that. But according to a couple reasonably reliable sources, MSG is an excitotoxin, and excitotoxins kill nerves. So how safe can MSG actually be if it's an excitotoxin?
gpt
Lots of things are toxic in large quantities. The LD50 of MSG (the amount of a substance that needs to be consumed for a 50% chance of death in most subjects) is 15-18 g/kg of body weight; the LD50 of salt is around 3 g/kg. As a simple additive, you're more likely to die from acute salt ingestion.

That's not to say there couldn't be other possible side effects, but the current state of affairs seems to suggest little to no real negative side effects.