The Endo Belly Protocol Practitioner Training
Navigating SIBO in Endometriosis Clients, with Jessica Duffin
Learn how to identify, address and manage SIBO in your endometriosis clients. SIBO or IMO shows up in up to 85% of people with endometriosis, and most practitioners are missing it.
$297 USD · Recorded training · Watch at your own pace
Two definitions worth getting right
Most practitioners know endometriosis and SIBO as separate conditions. What's often missed is how commonly they overlap, and how much each one can drive the other. When a client has bloating, constipation, diarrhea, pelvic pain, painful periods or infertility, it can be hard to tell where one condition ends and the other begins. This training helps you understand both conditions, recognize the patterns that connect them, and help your clients.
Endometriosis
A chronic inflammatory, estrogen-influenced condition where tissue similar to the endometrium grows outside the uterus. It's most common on the pelvic peritoneum, ovaries, bowel and bladder, and can appear across the body, including the diaphragm.
Often presents as
- Pelvic pain
- Heavy or painful periods
- Fatigue
- Bowel symptoms
- Bladder symptoms
- Brain fog
- Painful sex
- Subfertility
- Bloating
SIBO (Small Intestinal Bacterial Overgrowth)
An overgrowth of bacteria in the small intestine, where bacteria aren't meant to exist in large numbers. It often develops when digestion slows down, or when structural issues such as adhesions disrupt the normal movement of food and bacteria through the gut.
Often presents as
- Bloating
- Constipation
- Diarrhea
- Abdominal pain
- Reflux
- Food sensitivities
- Nutrient deficiencies
- Skin flares
Where the two collide is where this training lives
Endometriosis can contribute to SIBO by creating inflammation and adhesions that interfere with gut motility and the movement of bacteria through the small intestine. In turn, SIBO can worsen endometriosis by increasing exposure to bacterial toxins, particularly lipopolysaccharides (LPS), which trigger inflammation and immune activation. Each condition makes the other worse, and standard protocols for either one, applied alone, often fail this population.
$297 USD · Recorded training · Watch at your own pace
SIBO in endo isn't like SIBO in everyone else
Treating SIBO is already complex. In the endometriosis population, a few factors change how it presents, how it responds to treatment and how likely it is to come back.
Hypermobility
People with endometriosis are more likely to have hypermobility or hypermobile Ehlers-Danlos syndrome, which puts them at greater risk of abnormal scar tissue formation.
Adhesions
Adhesions occur in nearly all cases of abdominal surgery. One large study found that 55% to 100% of women who had pelvic surgery developed adhesions, and up to 90% of people who had major abdominal surgery did.
Mast cells and immunity
MCAS and immune dysregulation increase SIBO risk and change how SIBO presents and responds to standard protocols.
POTS
Autonomic dysfunction changes gut function profoundly. POTS and endometriosis often occur together, and that changes the treatment picture entirely.
Applying a generic SIBO protocol to a client with endometriosis, without accounting for these factors, often leads to a poor treatment response, significant die-off reactions and high relapse rates. This training shows you those differences so you can tailor your approach and get better outcomes for your clients.
Supporting the gut is part of managing endo itself
The bacterial toxins driving SIBO are also driving disease progression: SIBO increases LPS and other bacterial toxins that are directly linked to endometriosis progression and symptom severity.
Yet most practitioners, even highly skilled ones, have never been taught how to identify and support clients dealing with both conditions. In this training you'll learn how the two conditions interact, where conventional approaches fall short, and how to work confidently with this population.
$297 USD · Recorded training · Watch at your own pace
If you work with endo clients, you already know the pattern.
They come to you exhausted, bloated and in pain, and they've been handed a low-FODMAP sheet and sent on their way. They've been told their gut symptoms are "just IBS." They've cycled through elimination diets. They're losing trust in the process, and in the system that keeps missing them.
3x
People with endometriosis are three times more likely to have IBS than those without
90%
of endo patients experience gut symptoms, but only 7.6% have bowel lesions
85%
of people with endometriosis have SIBO or IMO (intestinal methanogen overgrowth)
65%
of IBS diagnoses are actually caused by SIBO, and most go undetected
Not an endometriosis specialist?
This still belongs in your clinical toolkit
1/10
women of reproductive age have endometriosis
7–10
years is the average time to diagnosis
62%
of people are first misdiagnosed with something else
∞
clients in your practice right now who have it and don't know
You don't need to be an endometriosis specialist to benefit from this training. You do need to know how to recognize complex cases, ask better questions, and understand when endometriosis and SIBO may be behind a client's symptoms.
Being able to spot complex cases is part of your responsibility as a practitioner, even if you don't have the capacity to work with them long term.
Four parts, built for the endo population
A structured progression from the endo-gut connection through testing, treatment, alternative protocols and relapse prevention. No watered-down basics.
Part 1
Understanding the Endo-Gut Connection
- What endometriosis actually does to the gut
- The endo belly: what's driving it, and why it's not always food
- Why IBS, SIBO and endo overlap so often, and what the data shows
- What SIBO is, and how it presents differently in this population
- Root causes of SIBO, with a focus on what shows up most in endo clients
- Why the gut connection matters for endo
Part 2
Testing and Treatment Frameworks
- SIBO testing: lactulose vs glucose vs fructose, common interpretation mistakes, and retesting
- Using FoodMarble for ongoing monitoring
- How to prepare your client and set realistic expectations
- Standard treatment options (antibiotics, antimicrobials, elemental diet) and how to tailor them for the endo population
- Preventing and managing die-off
Part 3
Alternative Approaches and Diet
- The probiotic-led protocol: studied strains, timelines, and when it's the better choice
- Pitfalls and case examples
- When and why dietary strategies are appropriate
- The main SIBO diets, and which are best studied for this population
Part 4
Symptom Management and Relapse Prevention
- Adjunct tools that work well for this group
- Endo-friendly and POTS- and hypermobility-friendly movement approaches
- Relapse prevention: prokinetics, adhesion-focused bodywork, vagus nerve support, gut-directed hypnotherapy
- Microbiome rebuilding considerations specific to the endo population
Built for practitioners who've been piecing this together from a dozen sources and want something structured, specific and rooted in this population.
$297 USD · Recorded training · Watch at your own pace
Is this for you?
This training is for you if:
- You work with women's health, gut health, nutrition or health coaching clients
- You already have a basic understanding of endometriosis
- You're seeing gut symptoms in your endo clients and want to understand what's driving them
- You want a clear, evidence-informed framework rather than a list of supplements
- You want to know when to refer, when to support, and how to do both with confidence
It isn't for you if:
- You're looking for a certification or prescribing qualification
- You have no foundational nutrition or health background
- You want a generic SIBO course unrelated to endometriosis
This training doesn't qualify you to diagnose SIBO or prescribe medication for it. Scope of practice is covered clearly throughout.
You don't need to be a SIBO specialist. You just need to want to stop guessing.
$297 USD · Recorded training · Watch at your own pace
Meet your instructor
Jessica Duffin
Certified Women's Health Coach · Endometriosis and SIBO specialist
“I built this workshop because I kept seeing endo clients fall through the gap between gynae and gastro, and I couldn't find anywhere that put it all together!”
Jessica Duffin is a certified women's health coach specializing in endometriosis and SIBO. She has trained with leading experts on both conditions, including Dr. Jessica Drummond, Dr. Allison Siebecker and Dr. Nirala Jacobi, and has worked with Endometriosis UK, Endometriosis Net and Endometriosis News.
Her journey began with her own endo and SIBO story, and she has spent the last thirteen years working with and supporting the endometriosis community. Her training in both conditions, and her experience in her own practice, have shown her how challenging they can be for clients and practitioners alike, and why addressing them together is essential for meaningful, lasting results.
Frequently asked questions
How much is the training?
The training is $297 USD.
When can I watch it?
The training was recorded live with Jessica on June 5, 2026. Once you register, you'll get the full recording and resources in the IMH portal, to watch at your own pace and come back to whenever you need.
Do I need advanced endo or SIBO training first?
No. This training builds on what you've learned inside the Women's Hormone Health Certification Program, so you don't need to be a SIBO or endo specialist. It starts with the foundations before going into the nuances.
Will I be able to treat endo or SIBO after this training?
This isn't a certification and doesn't qualify you to diagnose or prescribe medication. It gives you a clear clinical framework for understanding and supporting your clients, knowing when to refer, and working alongside other practitioners with confidence.
Will scope of practice be discussed?
Yes, clearly and throughout. You'll leave with a solid understanding of what sits within your scope and how to handle referrals well.
More questions? Email hello@instituteformenstrualhealth.com
Your endo clients deserve more than "it's just IBS"
The research is clear. The gut-endo connection is real, it's significant, and it's treatable when you know what you're looking at. This training gives you the clinical nuance to work with this population properly.
$297 USD · Recorded training · Watch at your own pace