Note (per my other comment) the connection between aspartame and migraines is not extremely strong. Nonetheless, I've found one source that labels possible form

Note (per my other comment) the connection between aspartame and migraines is not extremely strong. Nonetheless, I've found one source that labels possible formaldehyde sensitivity. http://www.medscape.com/viewarticle/579335 http://www.medscape.com/viewarticle/579335 (http://whilesciencesleeps.com/pdf/328.pdf http://whilesciencesleeps.com/pdf/328.pdf) If this is the actual mechanism, it would suggest that those people should avoid formaldehyde-containing foods in general, like apples, bananas, grapes, onions, carrots, seafood, beef, and poultry.