Dietary Metabolites Linked to Reduced Knee OA Risk

New research indicates that metabolomic markers tied to healthy eating may reduce knee osteoarthritis (OA) risk, though much of the benefit stems from weight control.

The study analyzed 603 participants from the Osteoarthritis Initiative over six years. Researchers used plasma metabolomics to identify 46 biomarkers linked to food groups. Two dietary signatures showed protective effects against OA.

However, when BMI was factored in, the association weakened significantly-up to 80% of the effect was mediated by body weight.

This underscores that excess weight remains a key driver of knee OA, via mechanical and metabolic stress.

The findings support the value of diet and weight control in reducing OA risk but call for further studies to determine causal relationships.

Study: Shike Xu S et al., J Rheumatol. 2026;53(4):443-9.