It's a flavor enhancer.
I've seen people who claim to be allergic to MSG eat food with Accent & no one has ever complained of a head ache or any other side effects....other than TOO FULL! lol
The ingredients are NOT listed on the container, I guess for copyright reasons? The nutritional info requirements ARE listed. I can find it at every store in the "baking goods" aisle, next to the salt.
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1Use as directed on product.