just a guess

i'd say yes, it's possible to inhale very minute amounts if you're smelling the product. the quantities would be very very small however. if the msg, by weight, is say 0.2%, and you might only inhale a few molecules of the product, it's possible that you'd get maybe a molecule of msg.

i guess it would also depend on if msg is heavier than the product too, in which case it would sink toward the bottom of the mixture.

my 2 cents Tweet