Patient story

My breath test showed >20ppm methane, but my weirdest SIBO symptom was joint pain from fructans

@gutpattern-51b26dc3BronzeContributorShared July 2026

Current status

Somewhat resolved
  1. Still struggling
  2. Somewhat resolved
  3. Mostly resolved
  4. Fully resolved
In their words

The story

Back pain and joint pain were primary symptoms, learned later that I was coincidentally avoiding the foods most likely to trigger the more common constipation symptom (for me it's triggered by lactose consumption). Have had confirmed >20ppm methane breath tests from multiple labs. Worked with dietician to isolate which FODMAPs I'm sensitive to: everything except GOS, which is nice because that means I can eat some types of nuts while otherwise eating low FODMAP (which is effective for managing my symptoms). The most important thing I discovered though was that my non-intestinal pain, which was pain in my knees, feet, and hands, was specifically caused by fructan consumption.

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What they were dealing with

Symptoms

Back painsevereJoint painseveremoderateFood intolerancesmoderate
What the workup showed

Tests & diagnoses

>20ppm methanesensitive to everything except GOS
Every treatment, and what happened

Treatments

Each treatment this contributor tried, in the order that mattered, with their own reported result. The ones marked with a trophy are the treatments they credit as decisive.

Made worseNo changePartially helpedHelped
Fructan avoidance
Helped

Contributor identified fructan consumption as the cause of non-intestinal pain in knees, feet, and hands.

Lactose avoidance
Helped

Contributor was avoiding lactose-containing trigger foods; constipation is triggered by lactose consumption.

Helped

Used after working with a dietician to identify FODMAP sensitivities; reported effective for managing symptoms.

Ginger tea
Helped a bit
Magnesium
Helped a bit

Reduced symptoms

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Made worseNo changePartially helpedHelped
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Discussion

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Important

This is one person's reported experience aggregated by GutPattern, not clinical advice, a treatment protocol, or a diagnosis. What helped one contributor can do nothing — or harm — for someone with a different underlying cause. Sudden, severe, bloody, feverish, or worsening symptoms belong with medical care. Always discuss care decisions with a qualified clinician.