The Migraine-Magnesium Connection, by Dr D. Williams

"...The Missing Mineral
One of the most commonly overlooked migraine triggers is a magnesium deficiency. The precise role of this mineral in the development of migraines is still being unraveled, but we do know that magnesium deficiencies allow serotonin levels to flow unchecked. A serotonin increase causes vascular spasms, which then reduces blood flow and oxygen to the brain. It also brings about the release of other pain-producing chemicals..."

read more: https://www.drdavidwilliams.com/magnesium-prevent-migraines/