who cannot take l carnitine Carnitine: the claims and why it may not work Carnitine Deficiency: What Is It,
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[DOI] [PMC free article] [PubMed] [Google Scholar] 376.McQueen G., Lay A., Lally J., et al

For example, in the study by Yasuo et al

The supplementation in diabetic hemodialysis patients also provided benefits to insulin metabolism, with increased antioxidant capacity and decreased CRP, although there were no changes in exercise performance, diastolic heart function, fasting glucose, glycosylated hemoglobin, lipid profile, and oxidative damage markers [132,133,134,135]

Mild myasthenia has been described only in uremic patients receiving D,L-carnitine

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Whitby PW, VanWagoner TM, Springer JM, Morton DJ, Seale TW, Stull TL