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Vitamin D Lowers Inflammation Markers In Adults With Tuberculosis

A review of 44 trials found vitamin D lowered tuberculosis severity scores and a key inflammation marker, but did not clear infection faster.

By Dr. Axe Editorial Team · October 19, 2026 · 1 source · Understand

Photo: Pexels

A systematic review and meta-analysis published October 10, 2026 in Nutrition Reviews found adjunct vitamin D lowered tuberculosis severity scores and an inflammation marker in adults treated for pulmonary tuberculosis, though it didn't speed clearance of infection from sputum.

The review, published October 10, 2026 in Nutrition Reviews, pooled 44 randomized trials and one quasi-experimental trial testing immune-modulatory nutrients as add-on therapy in adults 15+ with drug-sensitive pulmonary tuberculosis. Researchers searched four databases from March 2024 through May 2026, evaluating vitamins A, C, D and E, selenium, zinc, arginine, glutamine, iron, nucleotides and omega-3 fatty acids against sputum conversion, inflammation, mortality and TB severity scores. Vitamin D lowered TB severity scores at 8 weeks (standardized mean difference -0.83) and C-reactive protein at 6 weeks (SMD -0.43), but didn't improve sputum smear conversion (odds ratio 1.05, not meaningful). Arginine lowered CRP at 8 weeks (odds ratio 0.55), though its sputum-conversion effect relied on only two trials and wasn't consistent in sensitivity checks. Vitamin A, zinc and their combination showed no measurable effect.

These nutrients are host-directed therapies, aiming to support the patient's immune response rather than kill bacteria directly, as standard TB drugs do. Vitamin D activates macrophages that engulf and clear the TB bacterium, offering a plausible reason it tracked with lower inflammation and severity scores even without speeding bacterial clearance.

Vitamin D's Effect on TB Severity Score (0.83 SMD) and CRP (0.43 SMD)

Meta-analysis of 44 RCTs in adults with pulmonary TB

TB severity score at 8 weeks

0.83 SMD decrease

CRP at 6 weeks

0.43 SMD decrease

Nutrition Reviews, 2026, King et al.

Certainty of evidence is rated low to very low across nutrients, and researchers say routine supplementation cannot be recommended. No eligible trials existed for vitamin E, selenium, omega-3 fatty acids, nucleotides, iron or glutamine, and arginine/vitamin C sputum results were unstable in sensitivity analyses.

Dr. Axe’s Take

I read this as a reason to make sure TB patients are not vitamin D deficient, not a reason to assume supplements replace treatment. TB drugs clear the bacteria; vitamin D appears to support the immune response that controls inflammation and tissue damage alongside that treatment. If I were working with a TB patient, I would want vitamin D status tested and corrected through sensible sun exposure, food sources like egg yolks and fatty fish, and physician-guided supplementation where deficient, always alongside the prescribed antibiotic regimen. Keep taking prescribed TB medication exactly as directed; nothing here supports skipping or replacing it with nutrients.

— Dr. Axe

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Study summary

Who: Adults age 15+ with drug-sensitive pulmonary tuberculosis across 44 randomized trials plus 1 quasi-experimental trial
Design: Systematic review and meta-analysis, PRISMA-guided, PROSPERO-registered (CRD42024567237)
Dose: Doses varied by trial and nutrient; not standardized across studies
Primary result: Vitamin D: TB severity score down 0.83 SMD at 8 weeks; CRP down 0.43 SMD at 6 weeks; sputum conversion not improved (OR 1.05)
Secondary: Arginine lowered CRP at 8 weeks (OR 0.55); vitamin A, zinc and combination showed no measurable effect; arginine/vitamin C sputum results unstable, based on 2 trials
Funding / conflicts: Funding and conflicts not reported in the abstract.
Date: Oct 10, 2026