127 subjects were involved in this controlled study published in the Journal of Manipulative and Physiological Therapeutics (Feb. 2000:23(2), pp91-5). The subjects all had at least one migraine headache per month, based on the International Headache Society standard. The response of the group receiving treatment showed improvement in migraine duration, frequency, and disability. Those receiving chiropractic treatment used less medication than the control group. Of those receiving chiropractic adjustments, 22% reported a greater than 90% reduction in migraines after just 2 months of care. Additionally, another 50% of the group receiving chiropractic adjustments reported significant improvement in the severity of migraines.
This is not the first study supporting the benefits of chiropractic care in the treatment of headaches. Many previous scientific studies have demonstrated that chiropractic care is safe and effective in treating headaches.