“The gut and the immune system are two expressions of one coordinated design.”

Modern physiology makes one thing abundantly clear. Digestion and immunity are inseparably linked. The gastrointestinal tract is the largest immune organ in the body, housing the majority of immune tissue and serving as the immune system’s primary training ground. Every contraction, every microbial encounter and every hormonal shift in the gut informs the immune system and shapes how the body adapts to the world.

This communication depends on clear neurological signaling. The vagus nerve, enteric nervous system, spinal cord, hypothalamus and endocrine pathways operate in a continuous loop of input and output. When these signals are coherent, the system adapts. When they are distorted, the system struggles.
Vertebral subluxation, is a structural spinal shift that obstructs or distorts neurological communication, has the potential to alter this gut–immune dialogue. The cases featured in this issue reveal how reducing subluxation can influence visceral physiology in clinically meaningful ways.

“When communication improves, the gut and immune system reorganize.”

Infancy: Establishing the Foundations of Gut and Immune Intelligence

A growing body of chiropractic research demonstrates meaningful improvements in children with gastrointestinal disturbances, particularly constipation, reflux, colic and dysregulated elimination patterns. Across dozens of published clinical studies and literature reviews, chiropractors have documented changes in bowel frequency, ease of elimination, comfort, sleep, feeding, autonomic balance and overall wellbeing after care directed at reducing vertebral
subluxation. These reports do not claim to treat gastrointestinal diseases. They simply illustrate what can occur when interference is reduced and the systems responsible for digestion and autonomic regulation communicate more coherently.

One example of this appears in Allie Hamstead, DC’s paper:

“Resolution of Constipation Following Chiropractic Care to Reduce Vertebral Subluxation in an Infant with Birth Trauma.”

A newborn male suffered from persistent constipation, irritability and difficulty sleeping after a difficult birth. He strained for long
periods without passing stool and showed signs of discomfort and tension. Examination revealed vertebral subluxations at the atlas and
sacrum, two regions closely tied to vagal tone, digestive motility and pelvic autonomic function.

After gentle, specific chiropractic adjustments to reduce vertebral subluxation, the infant began having regular bowel movements, slept more comfortably and fed with greater ease. These early changes reflect the deep relationship between the nervous system, the gut and the developing immune system.

“The first lessons of immune intelligence are written in the gut.”

By restoring clarity along the neuroaxis, the infant’s physiology began to recalibrate and express healthier patterns of digestion and immune regulation.

Early Childhood: Immune Expression and the Gut Drainage Connection

Ear infections are one of the most common pediatric complaints and remain a leading reason parents bring their children to
chiropractors. A substantial body of chiropractic research documents improvements in children with recurrent otitis media after care directed at
reducing vertebral subluxation. Reported outcomes include improved drainage, reduced frequency of infections, decreased reliance on antibiotics and,
in many cases, avoidance of tympanostomy tubes. These reports do not claim that chiropractic treats ear infections. Instead, they reveal what can occur
when interference is reduced and the systems coordinating immune function, drainage and autonomic balance reorganize more effectively.

One such example is found in Christie Hafer, DC’s study:

“Avoidance of Tympanostomy Tubes and Resolution of Recurrent Otitis Media in a Toddler Following Chiropractic Care to Reduce Vertebral Subluxation.”

A 13 month old child presented with recurrent ear infections, disrupted sleep and chronic irritability. The child had undergone multiple rounds of antibiotics and was being evaluated for tympanostomy tube placement. Clinical evaluation revealed upper cervical vertebral subluxations affecting autonomic regulation and the biomechanics of eustachian tube drainage.

The child began a course of chiropractic care aimed at reducing vertebral subluxation. Over time, drainage patterns normalized, the cycle of infections resolved and the recommendation for tympanostomy tubes was withdrawn. The parents reported a calmer, more comfortable child who slept more consistently and showed improved behavior.

Although the primary issue involved the middle ear, the underlying physiology was tied to the gut immune axis. Recurrent infections often coexist with patterns of autonomic imbalance and digestive dysregulation, both of which depend on
clear neurological communication.

“The immune system follows the signals it receives. Subluxation distorts those signals.”

By improving neurological clarity, the systems that govern drainage, inflammation and immune readiness were able to function more coherently.

Systems Biology: Subluxation as a Multisystem Interference Pattern

In their integrative review titled: “Vertebral Subluxation and Systems Biology: An Integrative Review Exploring the Salutogenic Influence
of Chiropractic Care on the Neuroendocrine Immune System,”

Haas and colleagues outline the mechanisms through which vertebral subluxation disrupts multisystem communication.

They note that:
• neural pathways regulate digestive motility and secretion
• endocrine signals modulate inflammation, microbial composition and stress response
• immune cells respond directly to neurological cues, especially vagal input
• autonomic balance shapes the tone and readiness of the immune system

Subluxation alters afferent signaling into the brain and distorts autonomic output. This can influence gut motility, microbial homeostasis, mucosal immunity and inflammatory patterns.

 “The gut and immune system cannot operate coherently if the nervous system is not communicating coherently.”

The systems biology framework helps explain the improvements observed in both the infant constipation case and the recurrent otitis media
case.

The Lifespan Implications of Early Interference

When gut and immune communication is disrupted early in life, the effects may persist. Children may experience cycles of constipation,
recurrent infections, sensory dysregulation, food sensitivities, inflammatory tendencies and difficulty regulating sleep or behavior. These patterns
are not isolated conditions. They are adaptive responses emerging from a system working around interference rather than through clear
communication. Chiropractic does not treat gastrointestinal or immune conditions. It reduces vertebral
subluxation. When interference is removed, neurological input improves and the gut–immune
axis can begin to recalibrate.

“Health is not created, it is expressed through a coordinated system.”

This is why visceral improvements are common in infants and young children receiving chiropractic
care.

A Single Axis, Many Expressions

Across infancy and childhood, we see: constipation resolving, infections improving, sleep patterns normalizing,
autonomic balance shifting, immune resilience increasing.

Different symptoms.
Different ages.
One underlying mechanism.

The gut–immune axis is a neurological system. Vertebral subluxation disrupts it. The adjustment restores it.

When the signals improve, the system reorganizes.

“The gut is the immune system’s classroom, and the spine is its communication line.”

Chiropractic care supports this connection, allowing the body to express clearer digestion, cleaner immunity and more coherent physiology at every stage of early development.
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References

1. Hamstead A. Resolution of constipation following chiropractic care to reduce vertebral subluxation in an infant with birth
   trauma: a case study. J Pediatr Matern Fam Health Chiropr. 2025;2025:1-6.
2. Hafer C. Avoidance of tympanostomy tubes and resolution of recurrent otitis media in a toddler following chiropractic care to reduce vertebral subluxation: a case study and review of the literature. J Pediatr Matern Fam Health Chiropr. 2025;2025:70-78.
3. Haas A, Chung J, Kent C, Mills B, McCoy M. Vertebral subluxation and systems biology: an integrative review exploring the salutogenic influence of chiropractic care on the neuroendocrine immune system. Ann Vertebr Subluxation Res. 2025 Jan 6;2025:1-42.