Be wary of all packaged food if you are a migraine sufferer. The sodium may be a contributing factor but for me its the MSG and other chemicals that are hidden in this food that is a problem. Its best to keep your food as natural as possible to avoid eating any 'hidden' ingrediants. This doesn't apply to everyone but I know a lot of migraine sufferers who are sensitive to artificial flavourings and additives in packaged/processed food.
Hope this helps!