L-Carnitine
Also known as Levocarnitine, Carnitine
Amino-acid derivative that helps transport fatty acids into mitochondria for energy production.
How it's taken (route)
swallowed as a capsule or pill, usually on an empty stomach
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- Documented dose
- 500–2000 mg
- Typical frequency
- Once or twice daily with meals
- Cycle
- 12 weeks on, 4 off
- Half-life
- ~2–3 hours (oral)
- Common vial sizes
- 500 mg, 1000 mg
- Regulatory status
- Sold as a dietary supplement; injectable use is restricted/physician-supervised in many jurisdictions.
No syringe needed
L-Carnitine is taken oral capsule or tablet, so there is no U-100 syringe draw for it.
What it does
L-Carnitine shuttles long-chain fatty acids into cells’ mitochondria so they can be burned for fuel. People often look into it for energy support, exercise recovery, and body-composition goals when paired with diet and training.
Mechanism
Carnitine is required for beta-oxidation — the process that breaks down fatty acids for ATP. Supplementing raises plasma and tissue levels, which may support energy metabolism during exercise and recovery.
Storage — lyophilisedwhat's this?
Store capsules or powder in a cool, dry place away from moisture.
Storage — reconstitutedwhat's this?
Oral products are stable at room temperature; injectable vials should be refrigerated after reconstitution and used within ~28 days.
Reconstitution noteswhat's this?
Injectable L-Carnitine is typically mixed as 500 mg in 5 ml bacteriostatic water (1 mg per unit). Oral dosing is far more common and does not require reconstitution.
Commonly stacked with
- BPC-157
- TB-500
- CLA
Commonly reported side effects
- Nausea
- Fishy body odor
- Mild stomach upset
- Diarrhea at high doses
Contraindications noted
- Hypothyroidism
- Seizure disorders
- Pregnancy or breastfeeding
Research notes
L-Carnitine is widely available as a dietary supplement and is generally recognized as safe at typical oral doses. Injectable forms are used in clinical settings but are not approved for over-the-counter use in many regions.
Vendors carrying L-Carnitine
These research suppliers list this compound. Prices, vial sizes and testing vary — always check the current lot certificate before you buy.
- PeptideMaxxingpeptidemaxxing.com15% Off(opens in a new window)
- Penguin Peptidespenguinpeptides.com(opens in a new window)
- Value Research Labsvalueresearchlabs.com(opens in a new window)
- Peplair Researchpeplairresearch.shop(opens in a new window)
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Peptide Streak does not sell peptides and is not affiliated with these vendors. Some list metabolic compounds under coded product names.