Research shows:

“...for the management of low-back pain, chiropractic care is
the most effective treatment, and it should be fully integrated
into the government’s health care system.”-The Manga
Report (1993)

“The overwhelming body of evidence” shows that chiropractic
management of low-back pain is more cost-effective than
medical management, and that “many medical therapies are
of questionable validity or are clearly inadequate.”-The
Manga Report (1993)

“Cervical spine manipulation was associated with significant
improvement in headache outcomes in trials involving pa-
tients with neck pain and/or neck dysfunction and head-
ache.”-Duke Evidence Report, McCrory, Penzlen,
Hasselblad, Gray (2001)