Vitamin D supplementation is a common topic among headache disorders. Prior research has linked Vitamin D deficiency to various types of headaches, including migraines, tension headaches, and cluster headaches.1-3 Vitamin D deficiency is defined as a level <20 ng/mL.

Approximately 16% of the US population is impacted by migraines, making them one of the most common neurological disorders.1 Among women aged 15 to 49 years, migraines rank as the leading cause of years lived with disability and the second-highest overall.