I've averaged two or three of nasty migraines per year long before doing Atkins. Had one in the 4th week of diet that I finally knocked down with Imitrix (boy, I'm glad they developed that stuff, even if it does cost a fortune!) I'm just into my 11th Atkins week now, and (not unexpectedly), nothing more.

Lots of people report headaches during the 1st week of Induction, probably caused by sugar or caffeine withdrawal...but that's not even close to a true migraine. I've never heard of any increased incidence of migraines in Atkins dieters, but I wouldn't be surprised if there were some decreases in people with triggers from specific foods. Unfortunately, that doesn't seem to be the case with me.