Research synthesisModerate evidenceModerate effect4 studies · 4 beneficial · 0 neutral · 0 harmful
Across all 4 studies, L-carnitine supplementation showed beneficial effects on reducing C-reactive protein (CRP) levels, with a predominant moderate effect size. All 4 studies reported statistically significant reductions, though effect magnitude varied from small to moderate. Median study duration was 46 days, and doses ranged from 500 mg/day to 3 g/day, with most evidence coming from meta-analyses and RCTs in clinical populations (migraine, sepsis) and adults with impaired glucose tolerance.
- Effective dose range: 500 mg/day to 3 g/day
- Studied populations: adults with migraine, critically ill septic patients, adults with impaired glucose tolerance or diabetes
Caveats: Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed). Evidence base is small (only 4 studies) — conclusions should be considered preliminary. Doses and durations vary considerably across studies, and one study did not specify dose, limiting precision of dose-response recommendations.
Generated May 13, 2026