A Comprehensive Clinical Training for Health Practitioners
Mastering SIBO, IMO & ISO
A self-paced, evidence-informed programme designed to help health practitioners understand, interpret and work confidently with SIBO, IMO and ISO, from foundational physiology through to confident, real-world clinical decision-making.
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Self-paced online training
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Full access to all modules & resources
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Health professionals & students
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Enrol & begin immediately
A clear, structured approach to SIBO education
Small intestinal bacterial overgrowth (SIBO), intestinal methanogen overgrowth (IMO) and intestinal sulphide overgrowth (ISO) are increasingly recognised in clinical practice. Yet for many practitioners, greater awareness has not necessarily translated into progress in clinical outcomes.
Existing education often leaves clinicians uncertain about how to translate theory into confident, real-world decisions, particularly when it comes to:
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Choosing and interpreting breath tests accurately and confidently
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Understanding what different gas patterns mean physiologically
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Choosing and sequencing interventions appropriately
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Integrating breath testing with stool tests, OATs and functional markers
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Adapting approaches for different phenotypes and levels of tolerance
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Reducing relapse without over-restriction or unnecessary escalation
Mastering SIBO, IMO & ISO was created to provide a clear, clinically grounded and structured training, without oversimplifying these conditions or relying on one-size-fits-all protocols.
What this programme offers
This is a complete practitioner training, not a collection of disconnected lectures.
It is designed to help practitioners understand how SIBO, IMO and ISO actually function in the body, and how that physiology translates into testing, interpretation and clinical decision making. Rather than teaching protocols as standalone solutions, the course focuses on how to think through cases step by step, integrating protocols within a broader clinical framework.
You will learn how to move from symptoms to mechanisms, from test results to priorities, and from uncertainty to clear clinical direction.
The training brings together:
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A clear understanding of gas physiology and overgrowth mechanisms
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Test interpretation grounded in mechanistic understanding rather than cut-offs alone
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Guidance on when and how stool tests, OATs and functional markers add value
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Structured ways to sequence digestion, motility, mucosal support and antimicrobials
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Clinical reasoning skills for situations where responses are unpredictable
This is not a protocol library or a checklist course.
It is a clinically grounded training designed to support clear thinking when cases are messy, data conflicts, or responses are unpredictable.
Rather than memorising rules, you will learn how to reason through SIBO, IMO and ISO using physiology, patterns and priorities.
The aim is direction.
Knowing what matters most, what can wait, and how to move forward with confidence even when answers are not immediately obvious.
What you'll learn
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Foundations of SIBO, IMO and ISO
A clear understanding of hydrogen, methane and sulphide physiology, why overgrowth develops, and how symptoms map back to underlying mechanisms.
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Clinical drivers and root causes
How to identify motility, digestive, immune, structural and systemic contributors, and how to distinguish primary causes from secondary effects.
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Breath testing with precision
How to choose substrates, prepare clients, run tests correctly and interpret hydrogen, methane and sulphide patterns using North American, UK and European frameworks.
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Integrating stool tests, OATs and functional markers
How to use supporting tests to clarify ambiguous cases, identify coexisting dysbiosis or fungal overgrowth, and guide clinical sequencing.
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Clinical drivers and root causes
How to identify motility, digestive, immune, structural and systemic contributors, and how to distinguish primary causes from secondary effects.
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Case studies
Detailed walk-throughs of breath test interpretation and integrated clinical decision-making drawn from real clinical presentations.
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Building effective clinical plans
How to sequence digestion, motility, mucosal support and antimicrobials, and match strategies to SIBO, IMO and ISO phenotypes.
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Nutrition frameworks and therapeutic diets
How to use low FODMAP, elemental nutrition, low-sulphur approaches and low-histamine adjustments safely and effectively, while maintaining diet diversity.
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Supporting complex and relapsing cases
How to identify relapse risk, adapt plans for post-infectious IBS, slow-transit constipation or mixed gas patterns, and recognise when fungal overgrowth needs priority.
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Working with highly sensitive clients
How to stabilise histamine reactivity, ISO sensitivity and nervous system dysregulation, and how to progress safely when clients cannot tolerate antimicrobials.
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Clinical reasoning and practitioner confidence
How to think functionally, navigate uncertainty, interpret conflicting data and build clear, confident hypotheses in complex real-world cases.
Who is this course for?
This training is suitable for health professionals and students who want a clear, clinically meaningful understanding of SIBO, IMO and ISO, including:
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Nutritional therapy and nutrition students
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Qualified nutritional therapists and nutritionists
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Naturopaths
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Functional and integrative practitioners
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Medical doctors, including gastroenterologists
The programme is designed so that:
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those newer to SIBO can build strong, accurate foundations
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more experienced practitioners can deepen their understanding, refine sequencing and strengthen clinical confidence
About the course creator
Juliana Bernardes is a Registered Nutritional Therapist and Naturopath specialising in gut and functional health, with particular depth in SIBO and complex digestive presentations.
Alongside extensive academic training, clinical practice and practitioner education, her teaching is informed by personal experience of persistent SIBO, bringing a grounded understanding of the complexity, variability and uncertainty that often accompany these cases.
She holds an MSc in Personalised Nutrition, a BSc (Hons) in Naturopathy, an Advanced Diploma in Nutritional Therapy Practice, and is registered with BANT and the CNHC.
Course Modules
Programme structure and curriculum
This programme draws on over a decade of clinical practice in gut health, years of functional test interpretation, and nearly ten years of teaching and supervising practitioners. The material reflects real clinical patterns, common pitfalls, and the decision points practitioners struggle with most, not idealised textbook cases.
SIBO science has advanced rapidly in recent years. This training reflects the evolving evidence base, integrating current research with practical clinical reasoning.
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One full year of course access
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Certificate of completion
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CPD points (check with your association)
Module 1
Foundations: Understanding SIBO, IMO & ISO
Conceptual models of gas physiology, overgrowth origins, protective mechanisms and clinical presentations.
Module 2
SIBO, IMO & ISO as Secondary Syndromes
Why overgrowth develops, how motility, digestion, immune and structural factors interact, and how to identify underlying drivers.
Module 3
Breath Testing, Interpretation & Functional Correlation
Substrate choice, preparation, execution, interpretation across international guidelines, and integration with stool testing and OATs.
Module 4
Clinical Interventions and Sequencing
How to build phased treatment plans, prioritise foundations, and apply nutrition, antimicrobials and support strategies appropriately.
Module 5
Relapse Prevention and Complex Presentations
Understanding relapse patterns, mixed gas physiology, overlapping conditions such as SIFO, and higher-complexity scenarios.
Module 6
Working with Sensitive and Reactive Clients
Stabilisation, pacing, nervous system considerations, histamine and sulphide physiology, and avoiding restriction-driven setbacks.
Module 7
Clinical Integration and Practitioner Confidence
Functional clinical thinking, working with uncertainty, integrating data sources, and communicating clearly and responsibly with clients.
Bonus Resources
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Symptom Relief Toolkit
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Low FODMAP Clinical Quick-Guide
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SIBO Root-Cause Clinical Assessment Tool
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Practitioner Formulary for SIBO, IMO & ISO
Frequently Asked Questions
Not sure if this course is the right fit?
These common questions will help you feel more confident and clear before you enroll.
Introductory Offer
£395 TOTAL
If you are looking for a structured, physiology-led approach to SIBO, IMO and ISO that supports thoughtful, confident clinical decision-making, this training is designed for you.
