Chiropractic Care and the Nervous System: What New Research Is Investigating

The study focused on secretory immunoglobulin A (SIgA).

SIgA is an antibody found in saliva and other mucosal secretions in the body. It plays a role in the body’s first-line immune defences, particularly in areas such as the mouth, respiratory system, and digestive tract.

Because SIgA can be measured through saliva samples, researchers sometimes use it as a way of exploring how the nervous system, stress, and immune responses may interact.

Importantly, measuring a biomarker like SIgA does not mean a treatment is improving the immune system. It simply gives researchers a way to observe physiological responses in the body.

The researchers observed a temporary increase in SIgA levels about 30 minutes after the adjustment.

However, when samples were taken two weeks later, the SIgA levels had returned close to the original baseline.

In other words, the change appeared to be short-term rather than sustained.

The study also looked at other biological markers related to inflammation and nervous system activity, but these did not show significant changes during the study period.

Participants also reported small improvements in physical and mental health scores on a standard health questionnaire over the two-week period.

For most people, chiropractic care is primarily about improving movement, comfort, and function.

However, many patients also report that they simply feel different after an adjustment. They may describe feeling:

• more relaxed

• less tense

• clearer in their thinking

• or generally more at ease in their body

Research into areas such as nervous system responses and stress-related biomarkers may help explain some of these experiences over time.

That said, it is important not to overinterpret early findings. This particular study was small and observational, meaning it cannot prove cause and effect.

The Importance of Balanced Interpretation

The authors of the study described their findings as preliminary and emphasised the need for larger studies with longer follow-up periods.

Because of the small sample size and short study duration, the results should be viewed as an early exploration rather than a clinical conclusion.

At this stage, research like this simply suggests that the body may respond in measurable ways following certain types of chiropractic care.

In practice, chiropractic care focuses on the musculoskeletal system, including how the spine and joints move and how muscles support those movements.

An assessment may look at factors such as:

• posture and spinal movement

• joint mobility

• muscle tension

• movement patterns

• daily habits and activity levels

Care is then adapted to each person’s presentation and comfort level.

For many people, this approach supports better movement and helps them stay active in daily life.

Research into chiropractic care is continuing to evolve.

Studies like this one are exploring how the body responds to spinal adjustments in ways that may involve the nervous system and other physiological processes.

While these findings are interesting, they should be interpreted cautiously and do not mean chiropractic care can treat immune conditions.

What they do highlight is the complexity of the body and the growing scientific interest in understanding how different systems interact.