Inulin Fiber May Reduce Knee Osteoarthritis Pain
A six-week clinical trial indicates daily inulin supplementation can help manage osteoarthritis symptoms in older adults.
Updated on Oct. 29, 2026 in Arthritis
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Researchers at the University of Nottingham found that consuming 20 grams of inulin daily reduced knee pain for participants with osteoarthritis. The study, which concluded in Q3 2026, tracked 136 adults to assess if altering gut bacteria activity could alleviate joint discomfort.
Why it matters
The study explores whether modifying gut bacteria through fiber supplementation provides a viable non-pharmacological strategy for managing chronic osteoarthritis symptoms. This approach seeks to leverage the production of beneficial short-chain fatty acids like butyrate to influence systemic health and pain management.
In a clinical trial of 136 adults with an average age of 68, those taking 20 grams of daily inulin showed a 1.11-point reduction in pain on a 10-point scale compared to placebo. Participants also experienced an average improvement in handgrip strength of 4.62 kilograms.
The players
University of Nottingham
This is a public research university in the United Kingdom that serves as a hub for medical and scientific studies.
The details
Participants were randomized into groups receiving inulin, physiotherapy, both treatments, or a maltodextrin placebo to compare efficacy. While physiotherapy yielded a larger pain reduction of 1.55 points, the trial saw a higher dropout rate of 21 percent in physiotherapy groups compared to just 3.6 percent in non-physiotherapy cohorts.
Timeline
The clinical trial duration spanned six weeks.
The Big Picture
This study contributes to the growing field of research regarding the gut microbiome-osteoarthritis axis. It marks a departure from traditional mechanical or pharmacological treatments by testing whether dietary interventions can systematically influence joint pain through gut bacteria activity.
This intervention suggests that simple dietary changes like adding inulin fiber could offer a accessible way for older adults to manage knee pain. Patients should discuss potential dietary modifications with a healthcare provider to ensure such supplements fit safely into their existing health routine.
The takeaway
Daily supplementation with 20 grams of inulin showed measurable benefits for pain reduction and physical strength in study participants. Future research is needed to determine how this dietary fiber intervention could be integrated into standard osteoarthritis management plans.
Further reading
Learn more about the latest developments in managing joint conditions at the Arthritis section.
Source note: This article includes information reported by ZME Science.
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