[nitrogen]

My own anecdotal experience would leave me surprised if controlled studies found that modern chiropractic care had no useful effect at all. Over a three month period I watched one guy go from a hunch-backed nerdy appearance to a shoulders-back, upright, and confident posture. Chiropractors probably can't cure ulcers, but they probably can accelerate improvements in posture, which have payoffs in other areas (improved posture->reduced pain->less stress caused by pain->better quality of life).