Chiropractors

Episode Summary

Executive Summary: The episode examines chiropractic care, especially spinal manipulation, to separate tradition and belief from evidence. It finds modest evidence that chiropractic may help some back and neck pain, likely through mechanisms other than “realigning” spines, but finds no good evidence for treating children or for the core subluxation theory. Serious harms are rare but real, including stroke or death.

Main Topics: Origins of chiropractic (Priority: 5/5): The show traces chiropractic to D.D. Palmer, who developed the practice in the late 1800s from magnetic healing and proposed that spinal misalignments cause disease. Spinal manipulation for back and neck pain (Priority: 5/5): Evidence reviewed by researchers suggests spinal manipulation can reduce neck and back pain for some people, though studies are often low quality and benefits are modest. Chiropractic for children (Priority: 4/5): The episode questions taking babies and children to chiropractors, noting a lack of good evidence for benefit despite ongoing use and advocacy. The subluxation theory (Priority: 5/5): The foundational chiropractic idea that misaligned spinal joints cause broad illness is presented as unsupported by biology and clinical evidence. How chiropractic may work (Priority: 3/5): Researchers suggest any benefit may come from pain modulation, reduced stiffness, or placebo/context effects rather than correction of a structural problem. Risks and harms (Priority: 5/5): The episode covers side effects such as soreness, headache, dizziness, and rare severe outcomes including fractures, vascular injury, stroke, and death.

Key Arguments: Chiropractic's original explanation—that spinal subluxations block vital energy and cause disease—is not supported by science. There is some low-quality evidence that spinal manipulation can help neck and back pain, including in some comparisons with medications. The benefits for pain may come from non-mystical mechanisms such as temporary pain inhibition, reduced muscle tension, or placebo effects. There is no good evidence that chiropractic helps newborns or children with general health, growth, or specific conditions. Serious adverse events are rare but possible, especially with neck manipulation. Many chiropractors continue to use or endorse subluxation-based concepts despite weak evidence. Patients may continue care because they feel better, even if the underlying theory is incorrect.

Data Points: Americans with neck/back pain who visited a chiropractor: almost one third - Large survey cited early in the episode Trials reviewed for neck pain: almost 40 trials - Systematic review by Anita Gross and colleagues Typical study size in the neck-pain evidence base: often no more than 30 people - Many trials were described as low quality Canadian chiropractors who thought fixing subluxation was key to health: almost 1 in 5 - Survey of several hundred Canadian chiropractors Chiropractors agreeing there is a lack of evidence for most treatments they use: 1 in 4 - Survey of more than a thousand chiropractors Family chiropractic visits in Katie's childhood: every six weeks or so - Katie described routine visits through age 18 Duration of baby Katie's daily chiropractic treatment: about three months - Her parents took her as a newborn after a traumatic birth American College of Physicians guidance: included spinal manipulation as a suggested treatment - Referenced as part of the evidence for back pain care

Pivotal Quotes: "The science behind it is not likely to come because the science behind it is simply not there." — Marcello Costa: On the subluxation theory and chiropractic claims about disease "To do nothing with your patients isn't of any value either." — Anita Gross: Explaining why she may still use spinal manipulation clinically despite low-quality evidence "It's a bit like religion. You've got to filter out the bulls." — Bill Sorrey: Katie's father on chiropractic beliefs and claims

Implications: Listeners should view chiropractic as a possible option for some back/neck pain, not a cure-all. Claims about child health and whole-body disease lack evidence, and neck manipulation carries rare but serious risk.