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Evidence-Based Supplement Research
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L-Carnitine and Reduced Low-Density Lipoprotein Level

Research synthesisHigh evidenceSmall effect5 studies · 4 beneficial · 1 neutral · 0 harmful

Across 5 studies, 4 reported beneficial effects of L-carnitine on reducing low-density lipoprotein (LDL) levels, with a predominant effect size of small. The evidence includes multiple meta-analyses and systematic reviews, with effects observed in clinical populations such as adults with type 2 diabetes and women with polycystic ovary syndrome. Doses ranged from 1 g/day to over 2 g/day, though duration and form were inconsistently reported.

  • Studied populations: Adults with type 2 diabetes, women with polycystic ovary syndrome, and patients on hemodialysis

Caveats: One study in hemodialysis patients found no significant effect, suggesting benefit may be population-dependent. The included meta-analyses show high heterogeneity (I² up to 91%), indicating variability in results. Effect sizes are small overall, and clinical significance for LDL reduction may be modest.

Generated Jun 12, 2026
Doses used in studies
  • g/day: 1–2 (median 1.5, IQR 1.25–1.75) — 2 studies
5 of 5 papers
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