L-Carnitine is NOT a peptide, it's a small amino-acid derivative (~161 Da), synthesized in the body from lysine and methionine, essential for transporting long-chain fatty acids into mitochondria for energy production.
L-Carnitine Prices
11 vendors · 1 with an issuer-verified COA · lowest 10mg from $20.04 · checked
Where to buy L-Carnitine: 11 vendors compared
Tracked every day
L-Carnitine listing prices, tracked daily
The five cheapest in-stock package prices for L-Carnitine on each collected day, and the vendors that most often held those places.
Five cheapest in-stock package prices per day
Listed package price before coupons, any vial size. This is not the coupon-adjusted lowest 10mg price used to rank the comparison.
- Cheapest$20.04
- 2nd cheapest$30.00
- 3rd cheapest$40.00
- 4th cheapest$45.00
- 5th cheapest$45.00
Vendors most often in the cheapest five
- Nationwide Peptides37 days$45.000.0%
- Precisely Peptides17 days$45.74last seen Oct 6, 20260.0%
- EZ Peptides17 days$48.00last seen Oct 6, 20260.0%
- Regenix Peptides16 days$20.040.0%
- Peptide Maxxing10 days$45.000.0%
- American Amino & Peptides4 days$30.000.0%
- Novaglo Research4 days$40.000.0%
Current market data
L-Carnitine Price Report
A current summary of public listings after the price comparison above. Shipping and tax are not included.
The lowest current 10mg cost for L-Carnitine is $20.04 from Regenix Peptides. The median across vendors is $40.50.
- Lowest 10mg cost
- $20.04Regenix Peptides
- Median 10mg cost
- $40.50One normalized offer per vendor
- Lowest package total
- $20.04Regenix Peptides · package size may differ
- Public COA coverage
- 100%11 of 11 vendors
What the market shows
PeptidePrices found 16 in-stock listings from 11 vendors, checked through Oct 10, 2026. The lowest 10mg cost is 51% below the vendor median of $40.50; 5 vendors (45%) fall below that median. 11 of 11 vendors (100%) publish public COA evidence.
A public COA link shows that a vendor publishes testing data. It does not prove that every listed vial has a matching current report. Match the product, strength, batch, and lot before relying on a report.
How this report is calculated
The headline and median use each vendor's lowest whole-package checkout cost to obtain at least 10mg. Smaller packages are multiplied until the target is met, while larger packages retain their full checkout price. The lowest package total is shown only as secondary context because package sizes differ. Known public coupon discounts are applied. Shipping, tax, and unverified promotions are excluded.
Research context
What is L-Carnitine? Research, safety, and status
L-Carnitine (levocarnitine) is a naturally occurring compound central to fat metabolism: it carries long-chain fatty acids into the mitochondria where they're burned for energy. It's concentrated in high-energy tissues, heart, brain, skeletal muscle, and the body makes its own, so true deficiency is uncommon outside specific medical conditions.
Key research takeaways
It is genuinely FDA-approved (as Carnitor) for primary and secondary carnitine deficiency and for dialysis patients, one of the few approved items in this library, and has the strongest peer-reviewed evidence base here.
Two clinically meaningful interactions to flag: it may enhance anticoagulants (warfarin/acenocoumarol) and may inhibit thyroid hormone action, worth real attention, unlike most 'interactions' in this space.
L-Carnitine at a glance
PeptidePrices safety rating
8/10 · FDA-approved (Carnitor)
Mechanism
Amino acid derivative; essential transporter of long-chain fatty acids into mitochondrial matrix for beta-oxidation (fat burning); enhances mitochondrial energy production; antioxidant; reduces ammonia levels; enhances insulin sensitivity.
Research areas
Fat metabolism enhancement; exercise performance and recovery; cardiovascular health; mitochondrial disease; renal dialysis patients; fertility (sperm motility); weight management adjunct.
Regulatory / research status
Research / preclinical only
Half-life
~17 hours. Multi-weekly injection or daily oral.
Storage
Store sealed at room temperature, away from light and humidity.
Reported side effects
Generally very safe. IV: occasional nausea. Rare hypersensitivity.
FDA-approved for deficiency; fishy odor; GI side effects mild; very safe at therapeutic doses Safety ratings summarize published clinical data, adverse-event reporting, and regulatory status. How PeptidePrices rates evidence. Research information only, not medical advice.
Study highlights
- L-Carnitine is NOT a peptide, it's an amino-acid derivative (from lysine and methionine) essential for shuttling long-chain fatty acids into mitochondria for energy production. It is FDA-approved (Carnitor) for carnitine deficiency.
- It has the strongest peer-reviewed evidence base of the compounds in this library: a 2020 meta-analysis (37 RCTs) found modest weight/fat loss, and a 2013 Mayo Clinic meta-analysis linked it to reduced mortality and arrhythmias after myocardial infarction.
- Injectable delivery gives ~100% bioavailability vs ~14-18% oral, and bypasses the gut-microbiome conversion to TMAO.
- Two clinically real interactions worth noting: it may enhance anticoagulants (warfarin/acenocoumarol) and may inhibit thyroid hormone action.
Selected references
- Effects of L-Carnitine on Weight Loss, Meta-Analysis of 37 RCTs (2,292 participants) · Clinical Nutrition ESPEN, 2020
- L-Carnitine in Cardiac Secondary Prevention, Meta-Analysis (13 trials, 3,629 patients) · Mayo Clinic Proceedings, 2013
- L-Carnitine L-Tartrate and Exercise Recovery, Randomized Controlled Trial · PubMed, 2021
- Carnitor (Levocarnitine) Prescribing Information · FDA
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