<<Disclaimer: Verify this information before applying it to your situation.>> I have searched the archives about this and actually found a post about the exact brand of hair color I used yesterday (Belle color), but the message I sent to the original poster bounced (she may not have email anymore?) Anyway, migraine is one of my gluten reactions and I colored my hair yesterday with Belle color brand hair color (first time this brand). Within about 2 hours, I had a migraine. I suppose the "proof of the pudding" is to wait til the next time I color my hair, use the same product, and see if the same thing happens, but I would rather ask "you" whether anyone else has had a similar problem, with hair coloring specifically. The other person who used this product thought she had accidentally ingested some of it, but she also had had a salad that might have had croutons in it (but which she had not eaten). I did not have any gluten. Thanks for any enlightenment! (And no, I was not changing the color, just covering the gray!!!!!) :-) Anne Washburn North Carolina, USA