We are doing the elimination diet for my three children. I have been on the diet too and on the two occasions I had chocolate with my husband, I had a huge headache the next day. I have been a chocoholic all my life!! I also had a headache for the first week due to withdrawals, I presume. The best thing is I am not craving sweets and the weight is dropping off me!! I am losing about half a kilo a week (except during the salicylate challenge).