Ketones have been linked to decreased inflammation, less stress and a reduction in the brain "waves" that are believed to cause migraine aura.
The Keto diet is based on high-fat, "adequate" protein and low-carb foods, the researchers wrote in the journal Nutrients.
This form of diet has been shown to better migraines, dating back to the 1920s. But it is still unclear whether this was due to weight loss alone or if another factor was at play.