The first comment on the January 23, 2015 thread read: “I’ve been drinking bone broth daily for two weeks and my stomach looks like I swallowed a beach ball. Isn’t this supposed to heal the gut?” That question—posted under a post about gelatin-rich broths—sparked a discussion that ran for several pages. Many readers shared similar experiences: bloating, distension, even cramping after what they thought was a gut-healing staple. The thread revealed something that rarely makes it into paleo success stories: bone broth can be a digestive irritant for a subset of people.
If you’ve tried bone broth and felt worse instead of better, you’re not alone. The comments suggest the problem is real, and the explanations are more nuanced than “you’re doing it wrong.” Let’s walk through what that 2015 conversation taught us, and what practical steps you can take if your own digestion reacts poorly to broth or gelatin.
What the Comment Thread Revealed
The original post was a simple recipe for slow-simmered chicken bone broth with apple cider vinegar. Within hours, the first commenter reported bloating. Others chimed in: some had the same reaction, some didn’t. A few noted that store-bought broths caused more trouble than homemade. One reader mentioned that switching to shorter cooking times (4 hours instead of 24) reduced the bloating. Another pointed out that gelatin supplements gave her intense gas, while broth from the same bones did not.
The thread eventually settled on three main suspects: histamine content, the amino acid profile of gelatin, and individual variations in gut motility. None of these explanations are definitive—the comments were anecdotal—but they align with what we now know about food sensitivities and the biochemistry of bone broth.
Histamine: The Most Common Culprit
Bone broth, especially when simmered for many hours, is naturally high in histamine. Histamine is a biogenic amine that builds up as proteins break down during prolonged cooking. For people with low diamine oxidase (DAO) activity—the enzyme that breaks down histamine in the gut—consuming histamine-rich foods can trigger bloating, flushing, headaches, and digestive discomfort.
Several commenters noted that their bloating was worse with broth that had been refrigerated and reheated. That matches the histamine hypothesis: histamine levels increase over time as bacteria convert histidine to histamine. A freshly made broth that is consumed within a few hours contains less histamine than one stored for days.
If you suspect histamine is your issue, try these adjustments:
- Use fresh bones and cook for no more than 2–4 hours instead of 12–24.
- Drink the broth within a few hours of cooking, or freeze it immediately in small portions.
- Avoid slow thawing at room temperature; reheat only what you will consume right away.
- Consider a low-histamine approach for a week to see if symptoms improve.
Gelatin and Glycine: A Double-Edged Sword
Gelatin is the primary protein in bone broth, rich in glycine and proline. Glycine is often praised for its calming effects on the nervous system and its role in collagen synthesis. But in some people, high doses of glycine can act as a mild osmotic agent, drawing water into the intestines and causing loose stools or a feeling of fullness that mimics bloating.
One commenter described it as “a heavy, waterlogged sensation” that lasted for hours after drinking a large mug of broth. Others reported that gelatin capsules (often used for joint health) caused similar symptoms. The thread suggested that starting with a very small amount—say, half a cup of broth—and gradually increasing over weeks might allow the gut to adapt.
Glycine also stimulates gastric acid secretion. For someone with low stomach acid, that can be beneficial. For someone with acid reflux or a sensitive stomach, the sudden increase in acid production may cause burning, belching, or bloating. The key is individual titration.
Gut Motility and the “Sludge” Effect
A less discussed but plausible mechanism is that gelatin-rich broth can slow gastric emptying in some individuals. Gelatin forms a gel-like matrix when cooled, and even when warm, it may increase the viscosity of stomach contents. For someone with already sluggish motility—common in SIBO or hypothyroid conditions—this can lead to prolonged distension and gas production as food sits longer in the stomach and small intestine.
One reader in the thread mentioned that her bloating disappeared when she switched to a clear meat stock (simmered for only 1 hour) instead of a gelatinous bone broth. That anecdote fits the motility theory: a thinner, less gelatinous liquid moves through the digestive tract more quickly.
Practical Steps from the Thread (and Beyond)
The commenters who successfully reintroduced bone broth did so by changing not just the broth itself, but how they consumed it. Here is a consolidated list of strategies that appeared repeatedly in the discussion:
- Start with stock, not broth. Simmer bones for only 1–2 hours. The resulting liquid is lower in gelatin and histamine. If that agrees with you, gradually extend the cooking time.
- Use a low-histamine cooking method. Add a splash of lemon juice or vinegar only at the very end of cooking—acidic environments can increase histamine extraction from bones during long simmering.
- Test single ingredients. If you use gelatin powder, try it dissolved in water (not broth) to isolate the effect. Many commenters found gelatin powders more problematic than whole broth.
- Drink small amounts on an empty stomach. Half a cup, 20 minutes before a meal, allowed some readers to gauge tolerance without the confounding effect of other foods.
- Keep a symptom log. Note the time of consumption, batch details (cooking duration, storage), and bloating severity. Patterns often emerge over a week.
For a broader framework on troubleshooting digestive issues on a paleo diet, the post 5 Science-Backed Fixes for Paleo Digestive Problems covers systematic elimination and reintroduction strategies that apply well beyond bone broth.
When Bloating Persists Despite Adjustments
Some commenters reported that no matter how they prepared bone broth, they still bloated. A few eventually discovered they had underlying conditions such as SIBO or histamine intolerance that required broader dietary changes. The thread did not offer medical diagnoses, but several participants shared that working with a practitioner helped them identify triggers beyond broth.
If you’ve tried the low-histamine, short-cook, small-portion approach for two weeks and still see significant bloating, consider whether other high-histamine foods (aged cheeses, fermented vegetables, cured meats) or high-gelatin foods (pork skin, chicken feet, marshmallows) cause similar reactions. The comment thread also highlighted that stress and sleep quality influenced tolerance—several readers noted worse bloating on days they slept poorly.
The 2015 thread is still worth revisiting because it shows that even a revered paleo food can backfire. Instead of ditching broth entirely, treat it like any other reintroduction: sip a single tablespoon, wait half an hour, and note how you feel. Documenting that in a food diary turns a frustrating reaction into a clear signal. That’s the kind of data that helps you decide whether to tweak the cooking time, switch to meat stock, or drop broth altogether for a while.
