PEPTIDE RESEARCH TOPIC

L-Carnitine

L-Carnitine is a nutrient involved in mitochondrial fatty-acid transport. Explore deficiency treatment, supplementation research, product distinctions, and evidence limits.

TOPIC OVERVIEW

About L-Carnitine

Identity and names

L-Carnitine and levocarnitine name the same stereochemical form. Acetyl-L-carnitine and propionyl-L-carnitine are related compounds, not identical preparations.

Compound type

It is an amino-acid-derived nutrient, not a peptide. Foods, dietary supplements, and prescription formulations provide different product contexts.

Mechanism

Carnitine helps transport long-chain fatty acids for mitochondrial oxidation. This biochemical role does not prove a weight-loss benefit from supplementation.

Research focus and evidence

Research includes deficiency states, renal disease, exercise, and metabolic outcomes. Baseline status and preparation influence interpretation.

Regulatory status and limits

Prescription levocarnitine has defined deficiency-related indications. Those indications should not be generalized to bodybuilding, fat loss, or unspecified injectable products.

Topics covered
  • fatty-acid transport
  • primary and secondary deficiency
  • oral and prescription formulations
  • exercise and metabolic evidence
  • related carnitine compounds
Common names and related terms: L-Carnitine, Levocarnitine, L carnitine
RESEARCH SUMMARY

What Is L-Carnitine?

LAST VERIFIEDOctober 7, 2026

NIH describes carnitine's role in mitochondrial fatty-acid transport and reviews supplementation evidence across several health questions. Healthy people normally synthesize carnitine, so its essential cellular function alone does not demonstrate a need for extra supplementation. NIH carnitine fact sheet

The levocarnitine injection label addresses particular deficiency settings, including certain inborn metabolic disorders and dialysis-associated deficiency. Its clinical indication is distinct from general weight-loss or fitness marketing. Levocarnitine injection label

RESEARCH TRACKER

L-Carnitine Development & Clinical Research

Current programs, research areas, study status, enrollment, and expected completion dates organized from primary registry records.

LAST VERIFIEDOctober 7, 2026
Registered records179
Active studies20
Completed studies102
Phase 3 studies41
DeveloperRegistry sponsors include Mario Negri Institute for Pharmacological Research, Beni-Suef University, Ain Shams University. Sponsor identity does not establish product approval.
AliasesL-Carnitine, Levocarnitine, L carnitine
Biological targetsCarnitine helps transport long-chain fatty acids for mitochondrial oxidation. This biochemical role does not prove a weight-loss benefit from supplementation.
Development stageRegistered intervention phases: Early Phase 1, Phase 1, Phase 1 / Phase 2, Phase 2, Phase 2 / Phase 3, Phase 3, Phase 4. See study-specific context.
Regulatory statusPrescription levocarnitine has defined deficiency-related indications. Those indications should not be generalized to bodybuilding, fat loss, or unspecified injectable products.

What current projects are studying

HIV InfectionsFatigueInsulin ResistanceObesityHeart FailureEnd-Stage Renal DiseaseEnd Stage Renal Disease
SELECTED CURRENT RESEARCH

Latest and important projects

Showing 5 of 20 active studies
ALCALSNCT06126315

Trial on the Biological and Clinical Effects of Acetyl-L-carnitine in ALS

Amyotrophic Lateral Sclerosis

Phase
Phase 2 / Phase 3
Status
Recruiting
Enrollment
246 Estimated
Expected completion
Sep 2027
Record updated
Oct 6, 2026
Lead sponsor
Mario Negri Institute for Pharmacological Research
REGISTERED STUDYNCT07642076

Evaluation of the Clinical Impact of Adjunctive L-carnitine Therapy in Critically Ill Hepatic Patients Admitted to Intensive Care Unit

Hepatic

Phase
Phase 4
Status
Recruiting
Enrollment
58 Estimated
Expected completion
Mar 2027
Record updated
Sep 23, 2026
Lead sponsor
Beni-Suef University
REGISTERED STUDYNCT06564909

Effect of L-Carnitine on Biomarkers of Myocardial Reperfusion Injury in Patients With STEMI

Reperfusion Injury, Myocardial · Myocardial Infarction

Phase
Phase 2
Status
Active Not Recruiting
Enrollment
76 Estimated
Expected completion
Dec 2026
Record updated
Sep 1, 2026
Lead sponsor
Ain Shams University
Carnitine SuppNCT07783399

The Effects of Carnitine Supplementation on Oocytes in Women Undergoing IVF Process

Infertility (IVF Patients)

Phase
Not reported
Status
Recruiting
Enrollment
70 Estimated
Expected completion
Sep 20, 2026
Record updated
Aug 24, 2026
Lead sponsor
The Obstetrics and Gynaecology Clinic Narodni Front
REGISTERED STUDYNCT05602194

Studying the Effect of Levocarnitine in Protecting the Liver From Chemotherapy for Leukemia or Lymphoma

B Acute Lymphoblastic Leukemia · B Acute Lymphoblastic Leukemia With t(9;22)(q34.1;q11.2); BCR-ABL1 · B Acute Lymphoblastic Leukemia, BCR-ABL1-Like · Lymphoblastic Lymphoma · Mixed Phenotype Acute Leukemia · T Acute Lymphoblastic Leukemia

Phase
Phase 3
Status
Active Not Recruiting
Enrollment
440 Estimated
Expected completion
Dec 30, 2028
Record updated
Aug 21, 2026
Lead sponsor
Children's Oncology Group
Primary sources: ClinicalTrials.gov (defined search)Checked October 7, 2026. Counts include interventional registry records with an explicit matching intervention name or alias; broad search results, biomarker-only observations, and unrelated compounds are excluded. Active includes recruiting, not yet recruiting, active not recruiting, and enrolling by invitation. PubMed is the linked title/abstract query count, not a number of clinical trials or a measure of evidence quality.

Registry status does not establish safety, efficacy, or regulatory approval.

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Essential L-Carnitine guides

L-CARNITINE KNOWLEDGE ARTICLESPage 1 of 10
01
KNOWLEDGE ARTICLE

Benefits of L-Carnitine for Men: Energy & More

L-carnitine benefits for men include better energy, fat metabolism, and workout recovery. Learn what research says about dosing, safety, and forms.

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03
KNOWLEDGE ARTICLE

MOTS-C vs L-Carnitine: Key Differences Explained

MOTS-c vs L-carnitine compared: how each works, what research shows, dosing forms, and safety. Learn which may fit your goals and what to ask a doctor.

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04
KNOWLEDGE ARTICLE

Penguin Peptides L Carnitine 6000mg: What to Know

Penguin Peptides L Carnitine 6000mg is a high-dose research-grade injectable. Learn what L-carnitine does, typical dosing, reported side effects, and safety.

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05
KNOWLEDGE ARTICLE

Benefits of L-Carnitine Tartrate: What to Know

Benefits of L-carnitine tartrate include exercise recovery, muscle soreness support, and fat metabolism. Learn what research shows and how it's used.

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07
KNOWLEDGE ARTICLE

L-Carnitine With Fucoxanthin: Does It Burn Fat?

L-carnitine with fucoxanthin is a popular fat-burning supplement stack. Here's what human research shows, typical doses, and safety issues to know.

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11
KNOWLEDGE ARTICLE

Does L-Carnitine Work for Muscle Growth? Facts

Does L-carnitine work for muscle growth? Learn what research shows about carnitine, fat loss, recovery, dosing, and why it is not a muscle builder.

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12
KNOWLEDGE ARTICLE

L-Carnitine 3000 mg: Benefits, Dosage, and Safety

L-carnitine 3000 mg is a high-dose liquid supplement, usually taken as a daily shot. Learn what it does, typical dosing, side effects, and whether it's legit.

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13
KNOWLEDGE ARTICLE

L-Carnitine Dosage: How Much Per Day Is Safe?

L-carnitine dosage varies by form and goal, from 500 mg to 4,000 mg per day. Learn safe amounts, timing, and what research says for men and women.

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17
KNOWLEDGE ARTICLE

L Carnitine Injections Dosage: Guide & Chart

L carnitine injections dosage typically ranges from 500 mg to 2,000 mg daily. Learn protocols, timing, side effects, and safety tips for injectable L-carnitine.

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