I am very interested in your research re calcium propionate. I thought that it may be of interest to you that as a migraine sufferer, I have found that 282 is one of my main triggers for a migraine attack. I have them very infrequently but very severely. By keeping a food diary I have been virtually able to avoid them. Calcium propionate has been off my list for at least five years. Thanks for drawing the attention of the world to the effects of this preservative. - by email