§ 01 Overview
Overview
Amino acid derivative that shuttles long-chain fatty acids into mitochondria for oxidation; used IM or orally in fat loss and energy protocols.
Extensive supplement literature. Benefits are modest in non-deficient individuals.
§ 02 Mechanism
Mechanism of action
L-Carnitine transports long-chain fatty acids across the inner mitochondrial membrane via the carnitine shuttle, enabling β-oxidation. Endogenous synthesis is usually adequate; supplementation may help in specific deficiencies.
- 01Support for fatty-acid oxidation
- 02Anecdotal energy improvements
- 03Used in sports and weight-loss protocols
§ 03 Dosing
Dosing protocol
Standard Protocol
- Vial
- 500 mg/ml in 20 ml bottle (compounded)
- BAC Water
- N/A
- Dose Range
- 250 – 500 mg
- Starting Dose
- 250 mg
- Route
- IM
- Timing
- AM or pre-workout
- Frequency
- Daily or every other day
- Cycle
- 4–8 weeks, then 4 off
§ 04 Evidence
Evidence & research
Extensive supplement literature. Benefits are modest in non-deficient individuals.
FDA Status
Not an approved drug (Levocarnitine is approved for primary carnitine deficiency).
§ 06 News
In the news
8 articles from the last 12 months · updates hourly
A Mother’s Carnitine Boost Shapes Newborn Rabbits’ Metabolism, Study Finds - Bioengineer.org
A Mother’s Carnitine Boost Shapes Newborn Rabbits’ Metabolism, Study Finds Bioengineer.org
Does L-Carnitine Actually Help With Weight Loss and Athletic Performance? - Health.com
Does L-Carnitine Actually Help With Weight Loss and Athletic Performance? Health.com
Active Pomegranate Acai Daily Energy Drink Mix Powder, 15 Servings | Alpha GPC, L-Theanine, Organic Green Tea Caffeine, Acetyl L-Carnitine, Zero Sugar, Keto Friendly, Gluten & BPA Free, Vegan - Whole Foods Market
Active Pomegranate Acai Daily Energy Drink Mix Powder, 15 Servings | Alpha GPC, L-Theanine, Organic Green Tea Caffeine, Acetyl L-Carnitine, Zero Sugar, Keto Friendly, Gluten & BPA Free, Vegan Whole Foods Market
Thermo Ignite Drops Introduces ThermoIgnite Liquid Multi-Ingredient Dietary Supplement Formulation - GlobeNewswire
Thermo Ignite Drops Introduces ThermoIgnite Liquid Multi-Ingredient Dietary Supplement Formulation GlobeNewswire
Autism and Nutrition: Should Carnitine Be Part of the Diet? - www.autism360.com
Autism and Nutrition: Should Carnitine Be Part of the Diet? www.autism360.com
Carnitine Blood Test: Free, Total and Acyl Ratio Guide - Kantesti AI Blood Test Analyzer
Carnitine Blood Test: Free, Total and Acyl Ratio Guide Kantesti AI Blood Test Analyzer
10 Best Acetyl L-Carnitine Supplements of 2026 Ranked - Fitness Volt
10 Best Acetyl L-Carnitine Supplements of 2026 Ranked Fitness Volt
Polleo Sport L-Carnitine 10,000 adds a three-flavor liquid option - Stack3d
Polleo Sport L-Carnitine 10,000 adds a three-flavor liquid option Stack3d
§ 07 Sourcing
Sourcing & supply
Regulatory status
FDA-approved
This compound has an FDA approval for at least one indication. Brand pharmacy channels exist. Compounding may or may not be available depending on shortage status.
No suppliers in our directory currently stock this compound. For investigational or research-only compounds, legitimate channels may not exist outside clinical trials.
Browse full supplier directory§ 09 Safety
Safety & side effects
Side effects
- 01Fishy body odor
- 02GI upset (oral)
- 03Injection site pain (IM)
Contraindications
None specified.
§ 10 Questions
L-Carnitine FAQ
- What is L-Carnitine?
- Amino acid derivative that shuttles long-chain fatty acids into mitochondria for oxidation; used IM or orally in fat loss and energy protocols. L-Carnitine transports long-chain fatty acids across the inner mitochondrial membrane via the carnitine shuttle, enabling β-oxidation. Endogenous synthesis is usually adequate; supplementation may help in specific deficiencies.
- What is L-Carnitine used for?
- Reported uses include support for fatty-acid oxidation, anecdotal energy improvements, and used in sports and weight-loss protocols. Evidence strength is rated Clinical — see the evidence section for detail.
- How is L-Carnitine dosed?
- Commonly referenced dosing is 250 – 500 mg, typically daily or every other day, administered IM. This is educational reference only; consult a licensed clinician before use.
- How do you reconstitute L-Carnitine?
- For L-Carnitine, vials commonly come in 500 mg/ml in 20 ml bottle (compounded) and a common reconstitution is N/A. Use the reconstitution calculator to convert any vial size and water volume into exact insulin-syringe units.
- What are the side effects of L-Carnitine?
- Commonly reported side effects include fishy body odor, gi upset (oral), and injection site pain (im). This list is not exhaustive.
- Is L-Carnitine legal?
- This compound has an FDA approval for at least one indication. Brand pharmacy channels exist. Compounding may or may not be available depending on shortage status. FDA status: Not an approved drug (Levocarnitine is approved for primary carnitine deficiency)..