The goal of this clinical trial is to evaluate whether oral L-carnitine supplementation helps reduce inflammation and improve nutritional status in patients with end-stage kidney disease who are undergoing long-term hemodialysis.

A total of 50 participants will be randomly assigned to receive either:

• Oral L-carnitine solution (1 g, three times per week after dialysis), or
• A placebo solution that looks and tastes the same but does not contain L-carnitine.

The study will last for three months. Researchers will assess changes in:

• Inflammatory markers (high-sensitivity C-reactive protein, hs-CRP)
• Nutritional markers (serum albumin, ferritin)
• Blood lipid profile (cholesterol, LDL, HDL, triglycerides)

The findings from this study are expected to provide insights into the potential clinical benefits of oral L-carnitine supplementation in maintenance hemodialysis patients.

This randomized, quadruple-blind, placebo-controlled clinical trial is designed to investigate the effect of oral L-carnitine supplementation on inflammatory and nutritional parameters in patients with end-stage renal disease (ESRD) undergoing chronic hemodialysis (HD).

Study Design and Participants:

The study is conducted at the dialysis departments of Bu Ali Hospital and Partian Clinic in Tehran. Eligible participants are adults (≥18 years) who have been on maintenance HD for at least 6 months, are clinically stable for at least 3 months, and are able to provide informed consent. Patients are excluded if they have a recent infection, malignancy, severe liver disease, uncontrolled comorbidities, or have used anti-inflammatory or lipid-lowering drugs within the previous 3 months.

Randomization and Intervention:

Fifty participants are randomized into two groups. The intervention group receives oral L-carnitine solution (1 g, three times per week after dialysis, produced by Bonyan Salamat Kasra Company). The control group receives a placebo solution (distilled water with sodium saccharin) identical in appearance and packaging. Randomization is computer-generated and allocation is concealed.

Endpoints:

The primary outcome measure is the change in high-sensitivity C-reactive protein (hs-CRP) after three months of intervention. Secondary outcome measures include changes in serum albumin, ferritin, triglycerides, total cholesterol, HDL, and LDL.

This study is intended to help determine whether oral L-carnitine supplementation can improve inflammation, nutritional status, and lipid metabolism in hemodialysis patients.

Inclusion Criteria:

• Age ≥ 18 years
• On maintenance hemodialysis for at least 6 months
• Clinically stable for ≥ 3 months
• No hospitalization in the preceding 3 months
• Willingness to provide written informed consent and comply with study procedures

Exclusion Criteria:

• Use of statins, erythropoietin, corticosteroids, NSAIDs, or other anti-inflammatory/lipid-lowering agents within the previous 3 months
• Active infection, inflammatory disease, malignancy, or severe hepatic dysfunction
• Pregnancy or breastfeeding
• Participation in another clinical trial within the preceding 3 months
• Uncontrolled comorbidities (e.g., uncontrolled diabetes or hypertension)
• Acute cardiovascular events within the past 6 months
• Planned kidney transplantation during the study period
• Anticipated poor compliance
• Use of medications that could affect inflammatory or lipid parameters
• History of hypersensitivity to L-carnitine

Individual participant data (IPD) will not be shared due to patient privacy concerns, ethical considerations, and institutional restrictions. Only aggregated results will be published in peer-reviewed journals