Gastrointestinal Manifestations and Nutrition Support in [hEDS, POTS and MCAS], 2026, Katz+

[SNT Gatchaman]

Gastrointestinal Manifestations and Nutrition Support in Hypermobile Ehlers-Danlos, Postural Orthostatic Tachycardia, and Mast Cell Activation Syndromes

Spoiler: Authors

Katz, Jennifer; Angeli, Allison M; Alicea, Apeksha; Austin, Kerstin

PURPOSE OF REVIEW
Gastrointestinal symptoms are common and often severe in patients with hypermobile Ehlers-Danlos syndrome/hypermobility spectrum disorders (hEDS/HSD), postural orthostatic tachycardia syndrome (POTS), and mast cell activation syndrome (MCAS). This review provides a structured, practical framework for evaluation of gastrointestinal symptoms and appropriate use of nutrition support in this population, where clinical practice remains variable and escalation to non-oral nutrition support may occur prematurely.

RECENT FINDINGS
Emerging data highlight the high prevalence of disorders of gut-brain interaction, avoidant/restrictive food intake disorder, and malnutrition in these overlapping conditions. Evidence suggests that enteral and parenteral nutrition are frequently initiated without adequate trials of conservative and behavioral interventions, and that de-escalation once advanced nutrition support is established remains challenging.

SUMMARY
A coordinated evaluation integrating validated tools should precede escalation to non-oral nutrition support. Enteral nutrition is preferred when oral strategies fail, and parenteral nutrition should be reserved for intestinal failure. A multidisciplinary, biopsychosocial care model is essential to optimize outcomes and reduce unnecessary harm in this complex population.

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[SNT Gatchaman]

Gastroenterologists are increasingly encountering patients with these diagnoses who present with severe, unexplained gastrointestinal symptoms that impair oral intake, contribute to disordered eating behaviors, and prompt consideration of advanced nutrition support, including enteral nutrition (EN) and, in select cases, parenteral nutrition (PN). However, the indications for and appropriateness of nutrition support in this population are often unclear, raising concern given the associated risks, costs, and potential for long-term dependence.

Feeding intolerance—defined as the inability to achieve nutritional goals via the enteral route due to symptoms such as nausea, abdominal pain, early satiety, bloating, or dysmotility—is common in this population. Intolerance to even minimal enteral feeding is frequently encountered, and gastric feeding is often poorly tolerated regardless of objective evidence of gastroparesis. Interruptions in enteral nutrition, whether provider-directed or patient-driven, may further reinforce reliance on parenteral nutrition. These challenges are typically multifactorial, reflecting contributions from dysmotility, visceral hypersensitivity, and DGBIs, as well as, in some cases, conditioned or maladaptive responses to symptoms. Importantly, these symptoms represent a real and often debilitating patient experience and require a comprehensive, empathetic, and structured approach.

Optimal management requires a multidisciplinary model that includes gastroenterology, registered dietitians, nursing, psychology and psychiatry, pain management, pharmacy, and, when appropriate, interventional radiology, eating disorder specialists, social work, and ethics. Care should be coordinated with the primary care provider and guided by clearly defined goals and an individualized nutrition strategy.

Patient and caregiver education are essential, as is integration of non-pharmacologic therapies, including cognitive behavioral therapy, gut-directed hypnotherapy, diaphragmatic breathing, and interventions focused on coping and resilience. In selected cases, a formal patient agreement outlining expectations for engagement and use of nutrition support may be beneficial. Regular multidisciplinary review—particularly for high-acuity patients—supports consistent messaging, reduces fragmentation, and promotes appropriate utilization of nutrition support.

Recognition and management of disordered eating are critical, as maladaptive eating behaviors are common and may both contribute to and result from chronic gastrointestinal symptoms. Early referral to an eating disorder specialist is recommended when there is concern for avoidant/restrictive intake or significant nutritional compromise.

POTS is a disorder of autonomic dysfunction characterized by orthostatic intolerance and excessive postural tachycardia in the absence of hypotension.

Management should prioritize optimization of oral intake whenever feasible. Initial strategies include small, frequent meals; slow eating with attention to bite size; and maintaining an upright posture during and after meals while avoiding late-night intake.

Parenteral nutrition should be reserved for carefully selected patients and is generally discouraged in the absence of intestinal failure, consistent with guideline recommendations. Its use should be limited to patients with clear inability to meet nutritional needs enterally, objective evidence of intestinal failure or severe nutritional compromise, and failure of optimized oral and enteral strategies. When initiated, PN should be framed as a time-limited intervention and bridge to restoration of enteral or oral intake, within a multidisciplinary, biopsychosocial care model.