This Simple Fiber Supplement Reduced Arthritis Pain in Just 6 Weeks

Key Points:

• A six-week clinical trial at the University of Nottingham found that daily supplementation with the prebiotic fiber inulin improved handgrip strength, reduced knee pain, and altered pain sensitivity in people with knee osteoarthritis, effects distinct from those of physiotherapy.
• Inulin, a dietary fiber fermented by gut bacteria to produce anti-inflammatory compounds like butyrate, was associated with increased levels of the gut hormone GLP-1, which correlated with better muscle strength, suggesting a novel gut-muscle-pain connection.
• Physiotherapy improved physical performance measures such as walking speed and chair rise frequency, while inulin did not, indicating the two treatments benefit different aspects of osteoarthritis symptoms.
• The trial showed higher adherence and fewer dropouts in the fiber supplementation groups compared to physiotherapy, highlighting the potential ease of incorporating dietary fiber as a complementary treatment.
• Although promising, the study was small and short-term, and further larger, longer trials are needed to confirm the findings and clarify the mechanisms by which gut microbiota influence arthritis pain and muscle function.