SupplementDuel

L-Carnitine (Tartrate)

Performance

Shuttle for fatty acids into mitochondria. Modest fat-burning effects; stronger evidence for recovery and androgen receptor density.

fat-lossrecoveryandrogen-receptormitochondria
Typical dose
1–3 g daily
Evidence
Moderate (some RCTs)
Onset time
Cumulative: 4–12 weeks
Half-life
~15 hours
Forms
Powder, Capsule, Liquid
Source
synthetic
Best taken with
carbs (improves absorption)
Best time of day
post-workout
Bioavailability
3/5
Safety rating
4/5
Price per serving
$0.60
Vegan / GF / 3rd-party
✗ / ✓ / ✓
Find L-Carnitine (Tartrate)iHerb →

Vetted brands, third-party testing, ships worldwide.

Common uses

  • • Fat loss
  • • Recovery
  • • Endurance
  • • Cognitive (acetyl-L-carnitine form)

Effect profile

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Immunity
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Recovery
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Longevity
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Common side effects

  • • Fishy body odor (high doses)
  • • GI upset

Avoid if

  • • Hypothyroidism
  • • Seizure disorders

Drug interactions

  • • Warfarin
  • • Thyroid hormone

Related performance supplements

L-Carnitine (Tartrate) vs CaffeineL-Carnitine (Tartrate) vs Beta-AlanineL-Carnitine (Tartrate) vs TaurineL-Carnitine (Tartrate) vs Betaine Anhydrous

Medical disclaimer

SupplementDuel is for educational purposes only and is not medical advice. Consult a physician before starting, stopping, or combining supplements.