I Made Bone Broth in This Slow Cooker Every Week for 3 Months and My Gut Thanked Me

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I am a qualified nutritionist, not a gastroenterologist. The experiences shared here are personal and clinical observations. Always consult your doctor before starting any new supplement or dietary change, especially if you take medication or have a diagnosed digestive condition.

Three months ago, I had a problem I kept brushing off. After fifteen years of working with gut health clients, I should have caught it sooner in myself. Bloating after meals, erratic bowel movements oscillating between Bristol Scale Type 2 and Type 6, and a persistent low-grade fatigue that no amount of sleep seemed to fix. It was a classic picture of intestinal permeability — what many practitioners call “leaky gut.” That investigation led me deep into the research on slow cooker bone broth gut health, and eventually to testing the Instant Pot Duo 7-in-1 Electric Pressure Cooker, Slow Cooker, Rice, Steamer, Sauté, Yogurt Maker, Warmer & Sterilizer as my weekly broth-making tool.

I want to be upfront: I was skeptical. Bone broth is not a miracle cure. However, the science around collagen peptides, glycine, and gut barrier integrity is genuinely compelling. Research published in Current Opinion in Clinical Nutrition and Metabolic Care suggests that glycine — abundant in slow-cooked bone broth — plays a meaningful role in supporting tight junction proteins in the intestinal lining. That was enough for me to design a proper personal protocol and track it carefully.

Why I Chose the Instant Pot Duo for Slow Cooker Bone Broth Gut Health

There were several appliances I considered. Dedicated slow cookers, stovetop methods, even commercial bone broth powders. Ultimately, I landed on the Instant Pot Duo 7-in-1 Electric Pressure Cooker, Slow Cooker, Rice, Steamer, Sauté, Yogurt Maker, Warmer & Sterilizer for two specific reasons.

First, the pressure cooker function. Traditional slow-cooked bone broth requires 24 to 48 hours to extract meaningful collagen from connective tissue. Pressure cooking at high heat significantly accelerates collagen hydrolysis. Research from the Journal of Agricultural and Food Chemistry confirms that pressure cooking yields higher concentrations of hydroxyproline — a reliable collagen marker — in shorter timeframes. For me, practically speaking, that matters enormously on a Monday morning.

Second, the 6-quart stainless steel inner pot. Many cheaper models use aluminium or non-stick coatings I wouldn’t want leaching into something I’m consuming specifically for gut repair. The stainless steel insert felt like a non-negotiable from a clinical standpoint. Additionally, the slow cooker function meant I could run an overnight batch when I preferred a gentler, longer extraction.

The Science Behind Bone Broth and Intestinal Permeability

It’s worth pausing here to explain why I was using bone broth therapeutically at all. The gut lining — specifically the epithelial barrier — depends on tight junction proteins like occludin and claudin to maintain selective permeability. When those junctions degrade, inflammatory molecules can pass into systemic circulation. Glycine, proline, and hydroxyproline from bone broth have been shown in animal models to support the integrity of these junctions.

Glutamine, another amino acid extracted during long bone cooking, is particularly well-studied. A 2017 review in Nutrients noted that L-glutamine supplementation reduced intestinal permeability markers in clinical populations. Bone broth isn’t a pharmaceutical dose — I want to be clear about that. However, in my clinical experience, when clients use it consistently alongside other gut support strategies, many report meaningful symptom improvements.

First Impressions: Unboxing and Setup

The Instant Pot Duo arrived well-packaged and felt reassuringly solid. It’s not lightweight — this is a substantial kitchen appliance. The stainless steel pot gleamed, the lid sealed with a satisfying click, and the control panel was intuitive without being overwhelming.

Setting it up took about ten minutes including washing all components. The included quick-start guide was clear. That said, I did find the initial steam release valve slightly confusing to position correctly. A quick YouTube tutorial sorted that within minutes. The app integration — offering over 800 recipes — was a pleasant bonus I hadn’t anticipated using, but I found two solid bone broth protocols within it immediately.

On first use, I loaded it with two kilograms of mixed beef marrow and knuckle bones (pre-roasted at 200°C for 30 minutes to develop flavour), two tablespoons of apple cider vinegar (to help leach minerals from the bone), onion, celery, bay leaves, and peppercorns. Filled to the maximum line with filtered water. Sealed, set to high pressure for three hours.

The result was extraordinary. The broth was a deep amber, rich and gelatinous once cooled — a sign of high collagen content. The aroma filled my kitchen for hours. That first bowl, sipped warm at about 7am before breakfast, had a silky mouthfeel and a deep savoury flavour I found genuinely comforting.

My 12-Week Testing Protocol

I committed to a structured twelve-week protocol. Every Sunday evening, I made a fresh batch using the Instant Pot Duo 7-in-1 Electric Pressure Cooker. I alternated between the three-hour pressure method and an eight-hour slow cook setting depending on my schedule.

Each week I produced approximately five litres of broth. I portioned it into 250ml servings and refrigerated or froze them. My daily intake was 250ml upon waking, taken before coffee or food. On days I trained, I added a second 250ml serving in the evening.

What I Tracked Each Week

Bristol Stool Scale score (recorded each morning in a simple notes app)
Bloating severity on a 1–10 scale, assessed at midday and after dinner
Subjective energy levels on waking (1–10)
Any digestive discomfort, including cramping, urgency, or reflux episodes
Sleep quality (secondary measure, given the gut-brain axis connection)

I made no other significant dietary changes during this period. That was deliberate. I wanted to isolate the variable as cleanly as possible, understanding this was an n=1 self-experiment rather than a randomised controlled trial.

What Actually Changed: Honest Results Week by Week

Weeks one and two were unremarkable. I noticed no dramatic changes. My Bristol scores remained inconsistent — mostly Type 4 and 5 — and bloating after dinner was still registering a 6 or 7 out of 10. I’ll admit I had a moment of doubt around day ten. I almost concluded this was another overhyped food trend.

Week three brought the first meaningful shift. My morning bloating score dropped consistently to around 3. Bowel movements stabilised more reliably at Bristol Type 4 — the clinical sweet spot. Energy on waking improved from a baseline 5 to a more consistent 7. This felt significant, though I remained cautious about over-attributing it.

Weeks Six Through Twelve: The Cumulative Effect

By week six, I noticed something I hadn’t expected: a reduction in post-meal reflux episodes. I typically experienced mild reflux two to three evenings per week. By week eight, this had dropped to once per week or less. Whether this was the glycine content — which has demonstrated some lower oesophageal sphincter support in research — or simply the overall anti-inflammatory dietary shift, I genuinely cannot say with certainty.

By week twelve, my average bloating score had dropped from 6.5 to 2.8. Bristol scores were consistently Type 4. The persistent fatigue I’d described earlier had largely resolved. Sleep quality, interestingly, also improved — consistent with research on glycine’s role in sleep architecture published in Sleep and Biological Rhythms.

I’ve seen similar patterns in clinical practice. One client — a woman in her early forties with longstanding IBS-C — began using a slow cooker bone broth protocol alongside a modified low-FODMAP diet (as outlined by the Monash University FODMAP program). Within eight weeks, her constipation frequency had halved and her bloating scores improved substantially. Anecdotal, yes. But consistent with what I observed personally.

The Downsides You Should Know

I want to be genuinely honest here. There are real limitations to discuss.

First, the time commitment. Even with the Instant Pot Duo reducing cook time significantly, making bone broth weekly requires planning, sourcing quality bones, and active prep time. It is not effortless. For anyone with a chaotic schedule, sustaining this long-term is genuinely challenging.

Second, the histamine issue. Long-cooked bone broth is high in histamine. For clients with histamine intolerance — a subset I see regularly in practice — this can actually worsen symptoms rather than help. Increased bloating, skin flushing, or headaches after consumption may indicate this. Anyone with suspected histamine intolerance should proceed carefully and consult their doctor first.

Third, bone broth is not a standardised supplement. The collagen and amino acid content varies enormously depending on bone type, sourcing, cook time, and water quality. There is no guaranteed “dose” the way there is with, for example, a clinical probiotic like Lactobacillus rhamnosus GG at 10 billion CFU. That variability is worth acknowledging.

Finally, the Instant Pot Duo itself has a learning curve. The sealing ring requires regular replacement — approximately every 12 to 18 months — and can retain odours between uses. A minor inconvenience, but worth flagging for anyone sensitive to this.

Who Should Buy This (and Who Should Skip It)

This Is a Strong Buy For:

Anyone with IBS, mild intestinal permeability symptoms, or post-antibiotic gut disruption who is willing to commit to a consistent food-first protocol
Practitioners looking for a versatile recommendation for clients wanting to incorporate therapeutic bone broth without a stovetop commitment
Home cooks wanting one appliance that genuinely replaces five or six separate kitchen tools
Anyone already using the Monash FODMAP approach who wants to layer in gut-supportive nutrition

Skip It (or Proceed With Caution) If:

You have confirmed histamine intolerance — bone broth may exacerbate your symptoms
You follow a strict plant-based diet, as traditional bone broth is obviously animal-derived
You have a diagnosed IBD flare — please consult your gastroenterologist before making significant dietary changes
You’re looking for a quick fix with minimal effort — this requires real commitment

If you have a diagnosed gastrointestinal condition, inflammatory bowel disease, or are taking immunosuppressant medication, please speak with your GP or gastroenterologist before beginning any new dietary protocol. The American Gastroenterological Association (AGA) recommends working with a qualified clinician for any significant dietary intervention in IBD management.

Final Verdict: Slow Cooker Bone Broth Gut Health Made Genuinely Accessible

After three months of weekly use, my verdict is clear. The Categories Gut-Friendly Kitchen & Appliances, Leaky Gut & Gut Lining Tags bone broth, collagen, gut healing, leaky gut diet, slow cooker