Feel a headache coming on? Have an organic Granny Smith apple. In one study from the Smell & Taste Treatment and Research Foundation in Chicago, when subjects in the midst of a migraine attack sniffed test tubes containing a green apple smell, the pain improved more than when they sniffed tubes that had no scent. Researchers say it could be a matter of distraction, or it could be that the smell of green apple actually reduces muscle contractions in the head and neck, reducing headache pain. Earlier studies found that the smell of green apples helps reduce anxiety.