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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 appears to help in 3 of 3 studies with measurable effects — the evidence leans clearly favourable.
Most evidence is from high-quality meta-analyses and randomised trials published 2002–2025 with a typical study size of 20 participants.
Based on 22 studies · 2 meta-analyses · 17 RCTs · 1,990 total participants
Confidence
HighWhat the studies found
By outcome
Carnitine L-Tartrate has an evidence score of 6.5/10 — moderate evidence based on 23 indexed studies, including 1 meta-analysis. Recovery-optimized form of carnitine with evidence for muscle recovery, androgen receptor upregulation, and exercise performance.
The commonly studied dose of Carnitine L-Tartrate is 2000-3000mg (2-3g) daily. Research points to an estimated optimal dose around 2000mg, with a minimum effective dose near 1000mg. Individual response varies — start low and adjust.
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.
Citrulline Malate
Likely 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.
Last reviewed May 2026 · evidence from 20 studies · how we score
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.
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.
Increases androgen receptor density in muscle
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.
2000-3000mg (2-3g) daily
Take with food
| Form | Type |
|---|---|
| 💊L-Carnitine L-Tartrate powder or capsules | Recommended |
| 💧Liquid L-carnitine (often LCLT) | Alternative |
LCLT is ~68% L-carnitine by weight. Distinct from ALCAR (cognitive focus) or plain L-carnitine.
Minimum: 2 weeks
Optimal: 8 weeks
Cycling: Not required
Note: Insulin enhances carnitine uptake — taking with carbs improves muscle accumulation. Can split into 2 doses.
Based on RCTs showing reduced creatine kinase and improved recovery scores. Most studies used L-carnitine L-tartrate form specifically. Effects primarily seen with 3+ weeks supplementation, not acute dosing.
Less DOMS after training
Quicker return to baseline after hard training
Lower CK and other damage markers
Likely safe; consult doctor
May affect thyroid hormone action
May enhance anticoagulant effect
Tip: Take with food
Tip: Reduce dose
Carnitine L-Tartrate is generally well-tolerated and considered safe for most healthy adults at recommended doses. The most commonly reported side effects are GI upset, fishy body odor (high doses). Use caution if any of these apply to you: Seizure disorders (some concern with carnitine forms).
BCAAs
Probably helpsLeucine, isoleucine, and valine metabolized directly in muscle tissue — support protein synthesis and reduce exercise fatigue.
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