⚠ FOR LABORATORY RESEARCH USE ONLY · NOT FOR HUMAN CONSUMPTION · QUALIFIED RESEARCHERS 21+
// PB-0038 Small Molecule Metabolic

L-Carnitine

Mitochondrial FA shuttle.

L-Carnitine is a small molecule essential for mitochondrial fatty acid β-oxidation — specifically for the transport of long-chain fatty acyl-CoAs across the inner mitochondrial membrane. Though endogenously synthesized, it is studied extensively as a supplemental compound. Supplied as research-grade material with 3rd-party HPLC verification and full Certificate of Analysis per lot.

01

Compound profile.

// CHEMICAL & STRUCTURAL SPEC — L-CARNITINE
MOLECULAR FORMULA
C7H15NO3
Small Molecule · metabolic class.
MOLECULAR WEIGHT
161.2 Da
Monoisotopic / reported mass.
CLASS
Small Molecule
Compound classification.
ORIGIN
Synthetic / biosynthesized
Source or discovery context.
STUDIED PATHWAYS
FA β-oxidation (CPT-I/II)
Reported in published literature.
REPORTED HALF-LIFE
~15 hr (plasma)
Tissue saturation complex.
HPLC PURITY
99.8%
Minimum release spec · typical >99.9%.
APPEARANCE
White lyo.
White to off-white lyophilized form.
// PRIMARY STRUCTURE
N/A · quaternary ammonium compound

// L-carnitine — (R)-3-hydroxy-4-(trimethylammonio)butanoate. A quaternary ammonium compound essential for long-chain fatty acid transport across the inner mitochondrial membrane as part of the carnitine-acyl-carnitine shuttle (CPT-I / CAT / CPT-II system).
02

What the literature reports.

L-Carnitine is a small molecule essential for mitochondrial fatty acid β-oxidation — specifically for the transport of long-chain fatty acyl-CoAs across the inner mitochondrial membrane. Though endogenously synthesized, it is studied extensively as a supplemental compound.

Reported mechanism

L-carnitine functions as a substrate for carnitine palmitoyltransferase I (CPT-I), which converts long-chain acyl-CoAs to acyl-carnitines for mitochondrial import. Without carnitine, long-chain fatty acid oxidation cannot proceed — a genetic block (primary carnitine deficiency, CPT-II deficiency) is a well-characterized metabolic disease.

Research context

Several L-carnitine products are FDA-approved for primary carnitine deficiency (Carnitor). Widely studied in cardiovascular, metabolic, and muscle disease research. Generally recognized as safe at supplemental doses; research-grade material is for non-clinical research.

The above summarizes published research literature. This is not medical advice, a protocol, or a recommendation for use. This compound is supplied for laboratory research only.

03

Storage & release.

SHIP TEMP
Ambient
Lyophilized; stable at room temp in transit.
UNOPENED
Refrigerate
Lyophilized, protected from light.
RECONSTITUTED
~28 days
At 2–8°C; never freeze solutions.
RELEASE DOC
COA · per lot
3rd-party analytical · attached at ship.
lab@peptidebros:~$ cat release.l-carnitine.LCN-26-Q2-0167.log
// lot release record
compound L-Carnitine (C7H15NO3)
lot.id LCN-26-Q2-0167
class small molecule
mw.theoretical 161.2 Da
mw.observed 161.2 Da  [PASS]
purity.hplc 99.91%  [> 99.5% spec]
endotoxin < 0.125 EU/mL  [PASS]
sterility no growth  [PASS]
release.status RELEASED
04

Common questions.

What's the molecular profile?+

L-Carnitine is a small molecule (molecular formula C7H15NO3, MW approximately 161.2 Da) — not a peptide.

The full structural data and release specifications are in the Compound Profile section above. Every lot ships with an independently verified Certificate of Analysis.

How is purity verified?+

Each lot is independently verified by a 3rd-party analytical laboratory (STERIS Labs, Alcami Analytical, or equivalent) before release. Release specification is HPLC purity ≥ 99.5% (typical > 99.8%), mass spectrometry identity match within ±0.5 Da, water content < 5.0% Karl Fischer, and endotoxin < 0.25 EU/mL by LAL (USP <85>).

Look up the full COA for your lot at coa-lookup.html.

How is the compound shipped and stored?+

All compounds ship at ambient temperature in discreet, tamper-evident packaging. Lyophilized peptide powder is stable at room temperature for typical transit windows, which is why research-grade vendors ship this way. Tracked; signature not required.

Store unopened lyophilized product at 2–8°C protected from light. Once reconstituted, most peptides are stable at 2–8°C for approximately 28 days (compound-dependent).

Is this compound FDA-approved?+

Several L-carnitine products are FDA-approved for primary carnitine deficiency (Carnitor). Widely studied in cardiovascular, metabolic, and muscle disease research. Generally recognized as safe at supplemental doses; research-grade material is for non-clinical research.

All PeptideBros compounds are sold strictly as chemical reference materials for in-vitro laboratory research. They are not for human consumption.

Every lot,
on paper.

HPLC-verified. Mass-spec confirmed. Ambient-stable transit. The paperwork other vendors hope you never ask for.