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Supporting Motility and Bowel Regularity: A Step-by-Step Approach

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By Amy Doyle, MS, CNS+

Supporting Motility and Bowel Regularity: A Step-by-Step Approach

Table of Contents:

Introduction

Altered gastrointestinal motility is one of the most prevalent symptoms of functional bowel GI concerns encountered in clinical practice.1 Despite its frequency, altered motility remains challenging to address due to its heterogeneity and the influence of gut–brain interactions.

A clinically useful lens for understanding motility concerns involves shifting the focus from symptom suppression to addressing physiology across multiple systems, including digestion, absorption, immune signaling, barrier integrity, microbial ecology and neuroendocrine regulation.

Patient care can differ significantly depending on the patient’s predominant clinical presentation: occasional diarrhea, occasional constipation or mixed bowel patterns - primarily occasional constipation with intermittent episodes of diarrhea.

Rather than being defined by structural changes, motility-related functional bowel concerns are characterized by symptom clusters that reflect shifts not only in motility but also potentially in other core physiological processes, including2:

  • Visceral sensitivity
  • Mucosal or immune activation patterns
  • Changes within the gut microbial ecosystem
  • Alterations in central nervous system processing influencing digestive function

This blog outlines a stepwise care strategy to support your decision-making in practice.

Step One: Foundational Assessments and Identification of Subtype

Functional bowel GI concerns can share similar clinical patterns with other health concerns.3 The first step is to perform a comprehensive functional assessment to confirm that the patient’s symptoms are not due to structural changes, non-beneficial microbial exposure or underlying metabolic, enzymatic or molecular contributors.4 Additional indications that advanced assessments may be needed include, but are not limited to, unintended weight loss, nocturnal symptoms, changes in iron levels, symptom onset after age 50 and family history.4

Step Two: Investigation of Key Drivers

While no single causative factor has been isolated for functional bowel GI concerns, several key drivers have been identified.

Key Drivers of Functional Bowel Concerns 3,5,6,7,8,9

Occasional Diarrhea Occasional Constipation
  • Increased levels of hydrogen and hydrogen-sulfide producing bacteria
  • Changes in bile acid absorption
  • Changes in carbohydrate absorption (FODMAPS, fructose, lactose)
  • Increased intestinal permeability
  • Previous or current non-beneficial microorganism exposure
  • Reduction in Bifidobacteria, Lactobacillus and butyrate-producing organisms
  • Mast cell activity and histamine signaling
  • Altered gut-brain axis and autonomic balance
  • Stress
  • Altered serotonin signaling in the enteric nervous system
  • Methane-producing archaea (e.g. Methanobrevicator smithii)
  • Slow colonic transit
  • Poor fiber tolerance and fiber type mismatch
  • Changes in thyroid function
  • Pelvic floor concerns
  • Altered vagal tone/autonomic balance
  • Altered serotonin signaling
  • Estrogen/progesterone shifts
  • Reduced butyrate producing organisms
  • Changes in motility related to previous non-beneficial microorganism exposure

Additional assessments can help uncover contributors and support a personalized plan of care. For more information about foundational and supplemental assessments, refer to our Functional Bowel GI Health Protocol.

Step Three: Individualized Care

Unique dietary triggers, stress, mood, sleep and exercise can strongly impact symptom levels, making nutrition, lifestyle and targeted supplementation essential components of care.10

Nutrition directly influences microbial fermentation, motility, immune signaling and epithelial integrity, making it foundational to supporting motility.9 For example:

  • Occasional diarrhea: A short-term low-FODMAP diet can reduce fermentative load, osmotic activity and gas production, often improving stool urgency and frequency.11
  • Occasional constipation: Gradual introduction of soluble fiber supports stool hydration and colonic transit without excessive mechanical irritation.

Dietary changes should be used therapeutically and often temporarily, with structured reintroduction to prevent unnecessary restriction, nutrient depletions and unfavorable microbiome changes.

To explore more dietary strategies that support motility and bowel regularity, refer to our Functional Bowel GI Health Protocol.

Lifestyle considerations include acknowledging stress, mood and the gut-brain connection. Patients with functional bowel GI concerns often present with a broad range of somatic concerns—such as fatigue, sleep disturbances, diffuse musculoskeletal discomfort and cardiopulmonary sensations—that may arise in the absence of identifiable structural changes.12 Patterns of mood disturbance, including low mood, occasional anxiety and somatic preoccupation can influence how patients process and respond to visceral and extraintestinal signals.13

Any stress-management technique that supports physiological downregulation and enhances the body’s relaxation response can help patients feel more empowered in managing their symptoms and can promote greater parasympathetic activity.

Targeted nutraceutical support also differs depending on subtype but should focus on supporting digestion, microbial balance, intestinal barrier integrity and function, cytokine balance and motility.

Step Four: Track Outcomes and Adjust

Clinical outcomes should be tracked for 4-6 weeks at a time and include:

  • Stool frequency and form (Bristol scale)
  • Abdominal discomfort
  • Bloating and gas
  • Urgency or incomplete evacuation
  • Sleep quality
  • Energy levels
  • Cycle-related symptom shifts (in women)

Structured dietary and supplement recommendations should be adjusted every 8-12 weeks, based on your patient’s response to care. Laboratory assessments can be completed every 3-6 months as necessary.

Ongoing assessment and refinement of diet, lifestyle and supplement strategies ensure that care remains responsive to changing clinical needs. Compassionate, individualized guidance can help patients build greater resilience, improve daily functioning and experience meaningful progress over time.

Pure Encapsulations Nutrient Solutions

PureGG 25B contains Lactobacillus rhamnosus GG, which is well known for its favorable effects on bowel function, particularly abdominal comfort, bowel motility and occasional diarrhea.
Suggested Dose: 1 capsule daily, with or between meals

Epi-Integrity Powder promotes healthy modulation of mucosal immune responses to support GI integrity in a great-tasting powder.
Suggested Dose: 1 scoop, 1-2 times daily. Add 1 serving to 8 oz of water or juice. Shake or stir until dissolved.

Conclusion

Altered gastrointestinal motility requires a personalized, systems-based approach—one that moves beyond symptom suppression to address the interconnected physiological processes that shape digestive function. By identifying each patient’s predominant symptom pattern, investigating key drivers and applying targeted nutrition, lifestyle and supplement strategies, clinicians can create highly individualized care plans that meaningfully reduce symptom burden and improve daily functioning.

Resources

For more comprehensive recommendations on supporting functional bowel concerns, refer to:

Drug-Nutrient Interactions Checker: Provides valuable information on potential interactions between your patients' prescriptions, over-the-counter medications and nutritional supplements.

You can also explore Pure Encapsulations® to find On-Demand Learning, Clinical Protocols and other resources developed with our medical and scientific advisors.

References

  1. Bharucha AE, et al. Mayo Clin Proc. 2016 Aug;91(8):1118 1132
  2. American Gastroenterological Association. Accessed February 9, 2026
  3. Chen M, Ruan G, Chen L et al. Front Endocrinol (Lausanne). 2022;13:817100. doi:10.3389/fendo.2022.817100.
  4. Lacy BE, Pimentel M, Brenner DM et al. Am J Gastroenterol. 2021;116(1):17 44. doi:10.14309/ajg.0000000000001036.
  5. Schiller LR. Cleve Clin J Med. 2020;87(8):501 507. doi:10.3949/ccjm.87a.19102.
  6. Su Q, Tun HM, Liu Q, et al. Gut Microbes. 2023;15(1):2157697. doi:10.1080/19490976.2022.2157697
  7. Jeffery IB, Das A, O'Herlihy E, et al. Gastroenterology. 2020;158(4):1016-1028.e8. doi:10.1053/j.gastro.2019.11.301
  8. Pozuelo, M., Panda, S., Santiago, A. et al. Sci Rep 5, 12693 (2015). https://doi.org/10.1038/srep12693
  9. Robles A, Perez Ingles D, Myneedu K, et alNeurogastroenterol Motil. 2019;31(12):e13718. doi:10.1111/nmo.13718
  10. Radziszewski M, Smarkusz Zarzecka J, Ostrowska L. Nutrition, 2023;15(16):3662. Available from: https://www.mdpi.com/2072-6643/15/16/3662
  11. Varjú P, Farkas N, Hegyi P, et al. PLoS One. 2017;12(8):e0182942. Published 2017 Aug 14. doi:10.1371/journal.pone.0182942
  12. Ohlsson B. Ther Adv Gastroenterol. 2022;15. doi:10.1177/17562848221114558
  13. Grover M, Kolla B, Pamarthy R, Mansukhani M. et al. PLoS One. 2021;16. doi:10.1371/journal.pone.0245323.
  14. Guandalini et al. J Pediatr Gastroenterol Nutr, 2000:30(1), 54-60.

+Amy Doyle, MS, CNS is an employee of Pure Encapsulations.