L-Carnitine
MetabolicAlso known as Levocarnitine
Evidence tier
Substantial published literature
3,523 publications over 73 years · trials not yet curated
- Researched since
- 1953
- Publications
- 3.5k
- Mean purity
- —
- Vendors listing
- 0
No indexed vendor publishes certificate records for L-Carnitine that this index could read yet, so no purity comparison is possible.
Score breakdown
The score has two halves: the research base — how long the compound has been studied and how much has been published — and the quality of the evidence the market produces for it, aggregated across every vendor that carries it: assayed purity, lot-to-lot consistency, readable third-party certificates and those vendors’ review record. It measures the evidence base, not the merits or safety of the substance.
Studied since 1953 — 73 years of published research
How long the compound has been studied. Fifteen years or more of published literature earns full marks; a newer compound earns less.
3,523 publications indexed in PubMed
The volume of published literature located. Full marks at fifty or more publications.
No certificate records indexed yet — nothing recorded yet
Average assayed purity on the certificates published by vendors that carry this compound. Full marks at 99.5%+, nothing at 95% or below.
No certificate records indexed yet — nothing recorded yet
How tightly assayed purity and labeled-versus-actual mass hold across different lots. Rewards reproducible manufacturing.
No vendor testing policy recorded yet — nothing recorded yet
Whether the vendors carrying this compound publish per-lot certificates anyone can read without an account.
No certificate records indexed yet — nothing recorded yet
Share of certificates issued by a recognised third-party testing lab rather than an unnamed or self-named one.
What is L-Carnitine?
L-carnitine (levocarnitine), an amino-acid derivative central to the transport of fatty acids into mitochondria. It is available both as an approved medicine and as a dietary supplement and is extensively studied.
Studied in published research for fatty-acid metabolism, exercise and weight management.
Regulatory status
L-carnitine is an approved prescription medicine in one or more of the United States, United Kingdom and European Union. When listed by the vendors in this index it is labeled for laboratory research use only, and nothing here is medical advice or an endorsement of human use.
What the research examines
The areas of published research this compound appears in. These describe what the literature has studied — never a claim of benefit, effect or suitability for any use.
Published research
PepIndex records the size and shape of the published research footprint only. It does not evaluate or summarise clinical significance, does not describe administration, and nothing here is a claim of safety or efficacy.
- l-Carnitine Supplementation in Recovery after Exercise — Nutrients (2018)
Peer-reviewed article indexed in PubMed, published in Nutrients (2018).
- L-carnitine--metabolic functions and meaning in humans life — Current drug metabolism (2011)
Peer-reviewed article indexed in PubMed, published in Current drug metabolism (2011).
- Levocarnitine — PubMed-indexed journal (2006)
Peer-reviewed article indexed in PubMed, published in PubMed-indexed journal (2006).
- Propionyl-L-carnitine — Drugs & aging (1998)
Peer-reviewed article indexed in PubMed, published in Drugs & aging (1998).
- L-carnitine: to fuel or not to fuel the failing heart? — Hellenic journal of cardiology : HJC = Hellenike kardiologike epitheorese (2020)
Peer-reviewed article indexed in PubMed, published in Hellenic journal of cardiology : HJC = Hellenike kardiologike epitheorese (2020).
- Pharmacokinetics of L-carnitine — Clinical pharmacokinetics (2003)
Peer-reviewed article indexed in PubMed, published in Clinical pharmacokinetics (2003).
PepIndex describes what literature exists. We do not interpret it, assess clinical significance, or publish quantities, protocols or instructions for use.
Vendor comparison
| Vendor | Score here | Price / mg | Certificates | Mean purity | Label deviation | Get it |
|---|
Certificate records
No certificate records are indexed. Either none are published, or those published could not be read without an account.