system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What is MSG and why is it bad?

I love Chinese food but I always hear from my family and friends that it's really bad because of all the MSG in it. Is it really that bad for you or is it just a urban myth?
gpt
MSG, or monosodium glutamate, has been used as a food additive for a long time. 

Long story short, no scientific study has found any conclusive evidence that MSG has a harmful effect, even in studies conducted on subjects who reported an 'MSG sensitivity.' Studies conducted on lab mice found the lethal dosage of MSG was five times larger than that of ordinary table salt.