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L-Carnitine L-Tartrate (LCLT)
Recovery-optimized form of carnitine with evidence for muscle recovery, androgen receptor upregulation, and exercise performance.
What the evidence says
Carnitine L-Tartrate doesn't have enough studies with structured effect-size data yet to pool a verdict. Browse the studies below for individual findings.
Most evidence is from high-quality meta-analyses and randomised trials published 1982–2026 with a typical study size of 16 participants.
Based on 321 studies · 49 meta-analyses · 251 RCTs · 233 total participants
Confidence
High confidenceBy outcome
Meta-analysis and several RCTs support LCLT for muscle-damage recovery and androgen-receptor upregulation, but many trials are very small and performance/endurance effects are inconsistent, keeping it moderate.
265 randomised trials
every one checked individually
Every randomised or controlled trial of Carnitine L-Tartrate indexed in PubMed, not a hand-picked subset. Meta-analyses and systematic reviews are deliberately excluded from this count: most of them cover many compounds at once, so counting them would inflate it.
PubMed · as of Jul 2026
2 trials ongoing or recruiting · 18 completed on ClinicalTrials.gov
3 of the completed trials have posted results
Registered trials show research momentum for Carnitine L-Tartrate, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Oct 2026
L-Carnitine L-Tartrate (LCLT) is a highly bioavailable form of carnitine specifically researched for athletic performance and recovery. Unlike other carnitine forms, LCLT has been shown to upregulate androgen receptors, reduce muscle damage markers, and accelerate recovery.
The preferred form for athletes and those focused on body composition.
Raised androgen-receptor content in muscle in one 10-man study
Reduces markers of exercise-induced muscle damage
Shuttles fats into mitochondria for energy
How Carnitine L-Tartrate works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Not studied in pregnancy or breastfeeding. Discuss with a doctor before use
May affect thyroid hormone action A grade for this interaction is held for clinical review and has not been validated, so no severity is given. The precaution still applies: ask a pharmacist about the exact supplement and medicine. Do not stop or change prescribed medicines based on this notice.
May enhance anticoagulant effect
Tip: Take with food
Tip: Reduce dose
Carnitine L-Tartrate has an evidence score of 5.5/10 — moderate evidence based on 322 indexed studies, including 1 meta-analysis. Recovery-optimized form of carnitine with evidence for muscle recovery, androgen receptor upregulation, and exercise performance. Representative study: PMID 35128424.
The commonly studied dose of Carnitine L-Tartrate is 2000-3000mg (2-3g) daily. Individual needs vary — start at the lower end of the range and adjust based on how you respond.
The best time to take Carnitine L-Tartrate is in the morning. Taking it with food is preferred. L-Carnitine L-Tartrate (LCLT) has the fastest absorption kinetics among carnitine forms.
Carnitine L-Tartrate is generally well-tolerated and considered safe for most healthy adults at recommended doses. Reported side effects are uncommon and include GI upset, fishy body odor (high doses). Use caution if any of these apply to you: Seizure disorders (some concern with carnitine forms).
Citrulline Malate
Probably helpsCombines citrulline for nitric oxide production with malic acid for ATP synthesis — reduces fatigue and enhances exercise endurance.
Creatine
Likely helpsIncreases phosphocreatine stores for faster ATP regeneration, boosting strength, power output, and cognitive function under stress.
Whey Protein
Likely helpsComplete protein with high leucine content that maximizes muscle protein synthesis.
BCAAs
Likely helpsLeucine, isoleucine, and valine metabolized directly in muscle tissue — support protein synthesis and reduce exercise fatigue.
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Reviewed by Dr. Baher Al Hakim · Last reviewed June 2026 · evidence from 322 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
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