Food preservatives, such nitrates and nitrites, found in processed meats might trigger migraines. Such additives can be found in hot dogs, ham, sausage, bacon and lunch meats, experts say.

Why do nitrites cause migraines?

Nitrates from our food are broken down by certain types of bacteria. They are eventually turned into nitric oxide in the bloodstream, which has been associated with headaches. This research suggests migraine sufferers have higher levels of these bacteria in their oral cavity and therefore higher levels of nitric oxide.

Can you get headaches from nitrates?

Nitrate-containing compounds have been identified as common headache triggers. Food preservatives are frequently identified triggers for those who suffer from migraines (1). Also, cardiac medications containing nitrates may cause severe headaches, which occur in over 80% of patients taking them.