I hate to say this but I NEVER believe in "those" kinds of things...
I have a friend who takes it for parkinsons and it helps with her tremors but doesn't get rid of it. Anyway, she swears by it and has been drinking in for 2 years now. But, I've never heard of it used for migraines.
Personaly, I'm desperate enough...what's the harm in trying. Even some minimal effect is better than nothing for me.
I'm interested to hear if anyone else has heard it used migraines.