How is MSG harmful to dogs?

Answer 1

MSG is classified by the FDA as an excitotoxin, a dangerous neurotoxin that shrivels and kills brain cells and has been linked to causing seizures, migraines, heart palpitations and even cancer, amongst it's many symptoms.... in people! Never mind your dog, YOU should be avoiding MSG!

It's definitely one of things you should not feed a dog, but MSG isn't something you eat straight out the bag like potato chips. It's an ingredient in MANY human foods, and probably pet foods (MSG goes by 40 different names!). Unless the dog (or person) happens to be sensitive to MSG, eating something that contains MSG probably won't do any harm, though it's best avoid potentially harmful substances, both in foods we give to our pets, and for ourselves.

Answer 2

Stumbled upon this and this is why you shouldn't get your answers from a site that's less used like this one. Here's what the FDA actually says about MSG (tl;dr: it's safe)

fda.gov/food/food-additives-petitions/questions-and-answers-monosodium-glutamate-msg

Oh and it was published in 2012 too, the same time numnuts quoted the fda to say that it's an "excitotoxin"