Research synthesisModerate evidenceSmall effect4 studies · 3 beneficial · 1 neutral · 0 harmful
Across 4 studies, 3 reported beneficial effects of L-carnitine supplementation on serum albumin levels, with effect sizes ranging from small to moderate (predominantly small), and one neutral study. The most-studied dose was 3 g/day in critically ill patients in ICU or sepsis settings. Effects were typically observed at short durations (median 7 days), with the strongest evidence coming from two randomized controlled trials showing statistically significant increases.
- Effective dose range: 3 g/day
- Studied populations: critically ill patients (sepsis, ICU), patients on maintenance hemodialysis with malnutrition
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. The beneficial findings come primarily from acute hospital settings (7-day trials); longer-term effects or benefits in non-clinical populations are not well established. The single neutral study involved children on hemodialysis, suggesting potential population-specific differences.
Generated Jul 15, 2026