Dietary and Supplemental Vitamin D Intake and Pain Interference in Adults with Chronic Spine-Related Pain: A Cross-Sectional Survey Study

Why It Matters

Identifying vitamin D as a modifiable factor could help reduce disability in chronic spine‑pain patients and guide future interventional trials.

Key Takeaways

• Higher dietary vitamin D linked to reduced pain interference scores
• Regular vitamin D supplementation associated with lower functional disability
• Effect strongest in overweight or low‑activity subgroups
• Study adjusts for age, BMI, activity, sleep, mood, sun exposure
• Findings are associative, not proof of causality

Pulse Analysis

Chronic spine‑related pain remains a leading cause of disability worldwide, yet most treatments focus on analgesia rather than functional restoration. Emerging research suggests that nutritional factors, particularly vitamin D, may influence musculoskeletal health, neuromuscular performance, and inflammatory pathways that contribute to pain‑related interference. By shifting attention from serum levels to real‑world dietary intake and supplement use, clinicians can explore scalable, low‑cost interventions that complement existing pharmacologic and rehabilitative strategies.

The Frontiers in Nutrition study surveyed nearly 700 patients across four tertiary hospitals in China, employing a validated food‑frequency screener to rank vitamin D exposure and capturing supplement use through self‑report. Multivariable regression revealed that each standard‑deviation rise in the dietary vitamin D index corresponded to a 0.18‑point drop in the Brief Pain Inventory interference score, while regular supplementation produced a larger 0.31‑point reduction. Notably, the benefits amplified in individuals with higher body‑mass index or limited physical activity—populations that often experience compounded disability due to adiposity‑related vitamin D sequestration and reduced sun exposure.

Although the cross‑sectional design precludes causal inference, the findings generate a compelling hypothesis: optimizing vitamin D intake could attenuate functional impairment in chronic spine‑pain cohorts, especially among higher‑risk phenotypes. Future randomized trials should test dosage, duration, and target populations to determine whether dietary counseling or supplementation can meaningfully improve daily functioning and reduce reliance on invasive procedures. For practitioners, the study underscores the value of assessing vitamin D status as part of a comprehensive, multidisciplinary pain management plan.