L-Carnitine and Increased Serum Total Protein Levels

Across 3 studies, all reported beneficial effects of L-carnitine on increasing serum total protein levels, with effect sizes ranging from moderate to large. The evidence includes a recent RCT in ICU patients (3 g/day for 7 days) and a meta‑analysis in hemodialysis patients, where the pooled total protein increase was large (3.83 g/dL, p = 0.000). The median study duration was 186 days, but effects were seen even after one week. The most studied populations are clinical patients with renal insufficiency or critical illness.

• Studied populations: ICU patients with multiple conditions, uremic patients with renal anemia, and patients on maintenance hemodialysis with malnutrition

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. 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). Most studies were in clinical populations with underlying conditions (renal failure, critical illness) — generalizability to healthy individuals is uncertain.