Final answer:
Migraine headaches are most closely linked with an undersupply of serotonin. Low levels of serotonin can contribute to migraines and other conditions. Antidepressant medications can help restore normal serotonin levels.
Step-by-step explanation:
Migraine headaches are most closely linked with an undersupply of serotonin. Serotonin is a neurotransmitter that helps regulate mood, sleep, and appetite, among other functions. Low levels of serotonin have been associated with various conditions, including depression and migraines. Medications called antidepressants can help restore normal serotonin levels and alleviate symptoms of depression and migraines.