L-Carnitine Injection
Fat-burner injectable
All-in monthly price
No membership fee · this is the full price · free shipping · avg 4-week supply
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Optional — add a physician-reviewed at-home blood panel to your plan.
Your sex-hormone baseline plus the safety markers that matter on therapy — blood counts, liver and kidney function — from one painless upper-arm device. Matched to your sex (PSA for men; progesterone & FSH for women). No needle, no clinic, physician-reviewed.
This treatment requires licensed provider review and approval. Treatment is not guaranteed. If prescribed, medication is fulfilled by a licensed U.S. pharmacy where permitted by law. Compounded medications are not FDA-approved or FDA-cleared.
Reviewed by Dr. Gene, MD · Board-certified Family Medicine
Every Pepti prescription is reviewed by a licensed U.S. physician before it's dispensed — and only provided if clinically appropriate.
L-Carnitine Injection
L-Carnitine 500mg/ml injection helps shuttle fatty acids into mitochondria to be burned for energy. Used as a fat-burner, exercise recovery aid, and pre-workout boost. Self-injected.
About a 4-week supply supply at the standard prescribed dose — your physician confirms exact dosing.
A licensed US physician reviews your intake and prescribes when appropriate.
Compounded fresh at a US pharmacy and shipped cold-chain to your door.
Every order ships free — medication, physician care and refills, one all-in price.
Amounts shown are per unit. Compounded fresh at a US FDA-registered pharmacy.
Every batch independently tested
Every medication batch dispensed through Pepti is independently tested by a qualified third-party laboratory for applicable quality and safety standards before the pharmacy releases it. Batches are tested to the same standard used by 503B outsourcing facilities.
Confirms the finished preparation is free of viable microorganisms.
Screens for endotoxins that can cause fever or inflammatory reactions.
Verifies the labeled concentration of the active peptide is what is in the vial.
How L-Carnitine Injection is prescribed.
- Adults working on fat loss who want more from their training
- People on a weight-loss injection who want an energy boost alongside it
- Anyone with low energy and slow workout recovery their physician has evaluated
- Patients who tried oral carnitine and felt nothing
Your physician decides whether L-Carnitine Injection is appropriate for you after reviewing your intake and labs.
Inject 0.50 mL (50 units) intramuscularly once daily Monday through Friday.
- Licensed physician review of your intake, history, and labs
- Medication compounded to your prescription by a PCAB-accredited, FDA-registered pharmacy
- Every batch independently tested before release
- Sterile syringes and alcohol prep pads for injectables
- Tracked delivery to your door, refills on schedule
- Message your physician anytime; dose changes without an appointment
- Store refrigerated (36–46°F / 2–8°C) at all times, including before first use.
- One vial is your monthly supply. A fresh vial ships every 28 days on your refill schedule, so you're always well inside the beyond-use date on your label.
- Protect from light. Wipe the stopper with an alcohol pad before every draw.
- Dispose of syringes in the sharps container per the included instructions.
A typical course of L-Carnitine Injection.
Everything published
about L-Carnitine Injection.
How it is described to work, pathway by pathway. What the research shows and what it does not. Where it stands with the FDA, dated and sourced.
Read the referencepeer-reviewed, each verified on PubMed
mechanism, evidence, dosing, safety, FAQ
2026 · checked against fda.gov, not memory
How L-Carnitine Injection works, and what the research shows.
L-carnitine carries fat into the cell's mitochondria to be burned for energy.
As an injection it skips the poor absorption that limits carnitine supplements.
Injectable L-carnitine has decades of clinical use for carnitine deficiency.
Studies in exercise and metabolism report modest gains in fat burning and recovery.
References
- Fielding R, Riede L, Lugo JP et al.. l-Carnitine Supplementation in Recovery after Exercise · Nutrients (2018) · PMID 29534031
- Rebouche CJ. Kinetics, pharmacokinetics, and regulation of L-carnitine and acetyl-L-carnitine metabolism · Ann N Y Acad Sci (2004) · PMID 15591001
- Pooyandjoo M, Nouhi M, Shab-Bidar S et al.. The effect of (L-)carnitine on weight loss in adults: a systematic review and meta-analysis of randomized controlled trials · Obes Rev (2016) · PMID 27335245
- Askarpour M, Hadi A, Miraghajani M et al.. Beneficial effects of l-carnitine supplementation for weight management in overweight and obese adults: An updated systematic review and dose-response meta-analysis of randomized controlled trials · Pharmacol Res (2020) · PMID 31743774
- Talenezhad N, Mohammadi M, Ramezani-Jolfaie N et al.. Effects of l-carnitine supplementation on weight loss and body composition: A systematic review and meta-analysis of 37 randomized controlled clinical trials with dose-response analysis · Clin Nutr ESPEN (2020) · PMID 32359762
- Wall BT, Stephens FB, Constantin-Teodosiu D et al.. Chronic oral ingestion of L-carnitine and carbohydrate increases muscle carnitine content and alters muscle fuel metabolism during exercise in humans · J Physiol (2011) · PMID 21224234
- Stephens FB, Constantin-Teodosiu D, Greenhaff PL. New insights concerning the role of carnitine in the regulation of fuel metabolism in skeletal muscle · J Physiol (2007) · PMID 17331998
- Malaguarnera M, Cammalleri L, Gargante MP et al.. L-Carnitine treatment reduces severity of physical and mental fatigue and increases cognitive functions in centenarians: a randomized and controlled clinical trial · Am J Clin Nutr (2007) · PMID 18065594
- Brass EP, Adler S, Sietsema KE et al.. Intravenous L-carnitine increases plasma carnitine, reduces fatigue, and may preserve exercise capacity in hemodialysis patients · Am J Kidney Dis (2001) · PMID 11325685
- Koeth RA, Wang Z, Levison BS et al.. Intestinal microbiota metabolism of L-carnitine, a nutrient in red meat, promotes atherosclerosis · Nat Med (2013) · PMID 23563705
Citations are provided for educational purposes. They do not constitute medical advice. Always discuss any peptide protocol with your prescribing physician.
Important safety information
+
Possible side effects
Do not use if you have
If you experience severe side effects, call 911 or go to your nearest emergency room.
10 mL multi-dose vial, L-Carnitine 2 mg/mL (20 mg L-Carnitine per vial)
Frequently asked
about L-Carnitine Injection.
L-Carnitine 500mg/ml injection helps shuttle fatty acids into mitochondria to be burned for energy. Used as a fat-burner, exercise recovery aid, and pre-workout boost. Self-injected. L-Carnitine Injection is prescription-only at Pepti: a licensed physician reviews your assessment and, if appropriate, prescribes it to be compounded by a state-licensed, FDA-registered pharmacy.
L-Carnitine Injection is $219 per month at Pepti. That is all-in: medication, physician review and ongoing care, shipping, and messaging. No membership, consult, or visit fees, and the price is the same in every state.
L-Carnitine Injection is commonly prescribed for: Adults working on fat loss who want more from their training; People on a weight-loss injection who want an energy boost alongside it; Anyone with low energy and slow workout recovery their physician has evaluated; Patients who tried oral carnitine and felt nothing. Whether it is appropriate for you is decided by the reviewing physician from your history, medications, and labs where required.
Yes. L-Carnitine Injection is prescription-only. The free online assessment takes about five minutes, a physician licensed in your state reviews it within 4 hours, and if approved the prescription goes to the pharmacy. If not approved, the medication charge is refunded.
No. L-Carnitine Injection can be prescribed from the assessment alone. If your physician wants labs for your care, they'll ask through your account; upload a recent lab report from any lab at no charge, or order Pepti's at-home panel.
L-Carnitine Injection is a subcutaneous injection into the abdomen or thigh with a small insulin syringe. Your kit ships with sterile syringes and alcohol prep pads, and the exact dose and schedule are printed on the pharmacy label. Dosing videos are in your account.
33 more questions about Pepti, answered.Show fewer
One vial is your monthly supply at the dose your physician prescribes. A fresh vial ships about every 28 days, and the date moves if your physician changes your dose. Store it as the pharmacy label directs, refrigerated.
Once per fill, $219 each time, when the next vial ships. It renews until you cancel, which you can do anytime from your account with no cancellation fee.
The compounded L-Carnitine Injection with sterile syringes and alcohol prep pads, free tracked shipping in an unbranded box with insulated packaging, the physician review, ongoing physician care and dose adjustments, and unlimited messaging.
Reported side effects of L-Carnitine Injection are usually mild: mild redness or swelling at injection site; temporary fatigue or headache; mild nausea (uncommon). The physician screens your history, medications, and allergies before prescribing, the medication-specific consent lists the known risks, and you can message your physician about anything you notice. Seek emergency care for severe symptoms.
Response varies by person, goal, and dose, and L-Carnitine Injection is prescribed for ongoing use rather than a short trial. Your physician sets expectations at approval, tracks how you respond through your account, and adjusts the dose without an appointment.
Yes. Request it from your account or the app; your physician approves or declines. If approved you pay for the additional medication at the pharmacy's cost and the new dose applies to your next shipment.
Yes. Add L-Carnitine Injection to a plan with another treatment and both go through one assessment and one physician review, shipping together on one schedule. Each keeps its own catalog price. The physician reviews the combination and can adjust it.
No. Compounded L-Carnitine Injection is not FDA-approved. It is prepared to your physician's prescription by a state-licensed, FDA-registered 503A pharmacy and every batch is independently tested before release.
Yes, when prescribed by a licensed physician and dispensed by a licensed pharmacy, which is how Pepti provides it in every state it serves. Research-use-only L-Carnitine Injection sold without a prescription is labeled not for human use and is a different product.
L-carnitine carries fat into the cell's mitochondria to be burned for energy. At Pepti it is prescribed to support mobilizes fat for energy, improves exercise recovery, pre-workout boost, 500mg/ml injection. Individual response varies, and your physician sets expectations at approval.
L-carnitine carries fat into the cell's mitochondria to be burned for energy. As an injection it skips the poor absorption that limits carnitine supplements. Compounded L-Carnitine Injection is not FDA-approved; it is prescribed off-label by a licensed physician after reviewing your assessment.
L-Carnitine Injection is prescribed for mobilizes fat for energy, improves exercise recovery, pre-workout boost, 500mg/ml injection. It is commonly requested by adults working on fat loss who want more from their training; people on a weight-loss injection who want an energy boost alongside it; Anyone with low energy and slow workout recovery their physician has evaluated; patients who tried oral carnitine and felt nothing. Whether it is appropriate for you is the reviewing physician's decision.
L-Carnitine Injection is studied for mobilizes fat for energy, improves exercise recovery, pre-workout boost, 500mg/ml injection. Those are the goals it is prescribed to support at Pepti; results vary by person, dose, and consistency, and no outcome is guaranteed. Your physician tracks how you respond through your account.
Injectable L-carnitine has decades of clinical use for carnitine deficiency. Studies in exercise and metabolism report modest gains in fat burning and recovery. References are listed on this page.
L-Carnitine Injection is generally not prescribed with: active cancer or history of cancer (unless approved by oncologist); pregnancy or breastfeeding; severe kidney or liver disease; known allergy to the peptide or excipients. The physician screens for these in your intake, and anything that rules L-Carnitine Injection out means it is not prescribed and is refunded.
At Pepti. Complete the free assessment, a physician licensed in your state reviews it within 4 hours, and if appropriate L-Carnitine Injection is compounded by a state-licensed, FDA-registered pharmacy and shipped free to your door for $219 per month, all-in. Not prescribed means refunded.
Injectable vial: 10 mL at 2 mg/mL, containing 20 mg L-Carnitine. One vial is your monthly supply at the prescribed dose, and a fresh one ships about every 28 days.
Not currently. L-Carnitine Injection ships as a multi-dose vial with sterile syringes and prep pads. The pepti Pen is available for 10 other treatments.
$219 per month covers the compounded L-Carnitine Injection, the physician review, ongoing physician care including dose adjustments and refill review, unlimited messaging, and free tracked shipping. There is no membership, consult, visit, or refill fee; the only separate charges are optional at-home lab panels and a physician-approved dose increase billed at pharmacy cost.
Yes. L-Carnitine Injection is on Pepti's live catalog, which lists only treatments a partner pharmacy can compound and ship today. If a physician prescribes it, it ships; if it ever cannot be dispensed, the charge is refunded.
L-Carnitine Injection ships to 50 states, free and tracked, in insulated unbranded packaging. Eligibility is confirmed during the assessment from your shipping address.
$219 per month at Pepti. That includes the compounded L-Carnitine Injection, the physician review and ongoing care, free tracked shipping, and messaging, with no membership, consult, or visit fee. The price is the same in every state and every refill is the same price.
Pepti supplies L-Carnitine Injection as a monthly injectable vial with syringes and prep pads included, one vial per month at $219, prescribed by a licensed physician after a free online assessment and shipped free from a state-licensed, FDA-registered pharmacy in insulated packaging.
Yes. Pepti prescribes L-Carnitine Injection online in 50 states after a free assessment reviewed by a physician licensed in your state. It is compounded by an FDA-registered pharmacy and shipped free, $219 per month all-in. Not prescribed means refunded.
Yes. At Pepti the entire process is telehealth: a five-minute online assessment, physician review within 4 hours, then L-Carnitine Injection ships from the pharmacy. No clinic visit and no video appointment in most cases. $219 per month, all-in.
Yes, for the real thing. L-Carnitine Injection sold without a prescription is research-use-only product labeled not for human use, with no physician, no pharmacy, and no verified testing. Pepti's L-Carnitine Injection is physician-prescribed, pharmacy-compounded, batch-tested, and $219 per month including the physician and shipping.
Pepti does, in 50 states, with named board-certified physicians, a state-licensed FDA-registered compounding pharmacy, independent batch testing, and one published all-in price of $219 per month with no membership or consult fee. Refunded if the physician does not prescribe.
It is legal to be prescribed L-Carnitine Injection online by a licensed physician and have it dispensed by a licensed pharmacy, which is how Pepti provides it. Buying it as a research chemical without a prescription is a different product and is not for human use. Compounded L-Carnitine Injection is not FDA-approved.
$219 per month at Pepti, including the medication, the physician, and shipping. Refills are the same price and there is no membership fee.
Yes. Pepti has no clinics: the assessment, physician review, messaging, dose changes, and refills all happen online, and L-Carnitine Injection ships free from the pharmacy to your door in 50 states.
Start the free assessment at hellopepti.com, choose L-Carnitine Injection, and answer the health questions. A physician licensed in your state reviews it within 4 hours. If approved, L-Carnitine Injection ships within 1-3 business days and arrives in 1-3 more; if not, the $219 is refunded.
No. L-Carnitine Injection can be prescribed from the assessment alone at Pepti. If your physician wants labs for your care, they'll ask through your account; upload a lab report from any lab, or order a Pepti at-home panel from $129.
Pepti ships L-Carnitine Injection to 50 states, free and tracked, refrigerated in insulated packaging, directly from the pharmacy. Delivery is 1-3 business days after the pharmacy compounds it.
Questions people ask
about L-Carnitine Injection.
- L-Carnitine Injection: What It Is, Where to Get It Prescribed, and What It CostsL-Carnitine Injection — 10 mL multi-dose vial, L-Carnitine 2 mg/mL (20 mg L-Carnitine per vial). Specification, mechanism, dosing, formats, state availability and how to get it prescribed.
- L-Carnitine Injections vs GLP-1s (Semaglutide, Tirzepatide): Is L-Carnitine Like a GLP-1?L-carnitine and the GLP-1 medications semaglutide and tirzepatide are both prescribed around weight programs, but they are different kinds of molecule doing different jobs. What each is, how each is described to work, the human evidence, FDA status, dosing, price, Lipo-B, and why some people take L-carnitine alongside a GLP-1.
- L-Carnitine Injection Dosage: How Pepti Prescribes It, in Units and mLThe L-carnitine injection dosage Pepti prescribes: 0.50 mL (50 units on a U-100 insulin syringe) into the muscle once daily Monday through Friday, 20 doses per 10 mL vial, about four weeks. Includes a units-to-mL chart, injection sites, timing, how the oral study doses differ, what changes the directions, and side effects.
- L-Carnitine Injection Side Effects: What Is Reported, and What to ReportThe side effects of L-carnitine injections, from the approved levocarnitine label and the trials: injection-site soreness, nausea, vomiting and gastritis, fishy body odour, seizures, warfarin and INR, hypersensitivity, kidney impairment and the TMAO question, who should not take it, and when to message your care team or call 911.
- Can You Take L-Carnitine Injections With Tirzepatide or Semaglutide?Whether L-carnitine injections can be prescribed alongside tirzepatide or semaglutide, how a fat-transport cofactor differs from a GLP-1, what the evidence does and does not show, the nausea overlap, how a weekday intramuscular schedule fits a weekly injection, what to put on your intake, and how to add it properly.
- How Long Does L-Carnitine Take to Work? What the Studies Measured and WhenHow long L-carnitine studies ran and what they measured: blood levels within hours of an injection, muscle carnitine only after 24 weeks of oral loading with carbohydrate, weight trials of 8 to 24 weeks with a modest effect, six-month fatigue trials, and why no study has timed the low-dose intramuscular injection in healthy adults.
- Do You Need a Prescription for L-Carnitine Injections? Is It Legal to Buy Online?L-carnitine injections need a prescription in the US, even though oral L-carnitine is sold as a supplement. Why, how levocarnitine's FDA approval works, what off-label prescribing means, where it stands in 2026, and what a Pepti L-carnitine prescription includes.
- Best Place to Get L-Carnitine Injections Online: How to Choose a ProviderWhere to get L-carnitine injections prescribed online: the provider checklist, the seizure, warfarin and kidney questions a real intake asks, the fat-burner claims to walk away from, and what Pepti's L-carnitine prescription includes.
- L-Carnitine Injections for Women: What the Research Shows, and What to Check FirstWhat research has looked at with L-carnitine for women: no women-only trial in the live research, weight meta-analyses of mixed adults with a modest effect, the best-known muscle study enrolling men only, pregnancy and breastfeeding, iron and thyroid as causes of fatigue to rule out first, the menopause question, side effects, and how to get it prescribed.
- L-Carnitine Injections for Men: What the Research in Men Found, and What to Check FirstWhat research has looked at with L-carnitine in men: the 2011 muscle-biopsy study in fourteen healthy men that needed 24 weeks of oral loading with carbohydrate, the modest oral weight trials, why L-carnitine is not a hormone or testosterone treatment, the causes of male fatigue worth ruling out first, side effects, and how to get it prescribed.
- Is L-Carnitine Banned in Sports? WADA, Injections, IV Drips and Drug TestsL-carnitine is not named on the 2026 WADA Prohibited List. What tested athletes still need to check: WADA's 100 mL infusion rule for IV carnitine drips, why an intramuscular vial is a different thing, supplement contamination, workplace drug tests, Global DRO, and how L-carnitine injections are prescribed.
- L-Carnitine Benefits, Injections vs Supplements, and L-Carnitine vs Acetyl-L-CarnitineWhat L-carnitine (levocarnitine) is, what the research describes for weight, exercise and fatigue, how injections compare with oral supplements, how acetyl-L-carnitine differs, and how Pepti's L-carnitine injection is supplied, dosed and priced.
- Peptides for Energy and Fatigue: What Is Prescribed and What to Rule OutNAD+, MOTS-c, SS-31 and the injectable nutrients used for fatigue: what each one is, how it is given, what it costs, and the causes a physician must exclude first.
- How Much Do Peptides Cost? Real Monthly Prices and What Drives ThemWhat prescription peptides actually cost per month, why single molecules price differently from four-peptide blends, which costs providers hide behind a low headline, and how to compare.
- How to get L-Carnitine Injections prescribed online
- How Much Does L-Carnitine Cost?L-Carnitine cost in 2026: $219 per month all-in at Pepti — compounded medication, physician review, and shipping included. No membership or consult fees.
Read more about L-Carnitine Injection.
SLU-PP-332 vs Semaglutide: Exercise Mimetic vs GLP-1, Compared
SLU-PP-332 and semaglutide are both filed under weight loss, but semaglutide is a GLP-1 medication with large human trials that works on appetite, and SLU-PP-332 is an experimental compound with mouse data only that works on muscle fuel use. Mechanism, evidence, FDA status, dosing, price, side effects and which fits which goal.
SLU-PP-332 vs L-Carnitine: Exercise Mimetic vs Fat-Transport Molecule, Compared
SLU-PP-332 and L-carnitine both come up around fat metabolism and endurance, but one is an experimental synthetic receptor agonist with mouse data only and the other is a molecule the body makes, with many human trials. Mechanism, evidence, FDA status, dosing, price, side effects and which fits which goal.
L-Carnitine Injection Side Effects: What Is Reported, and What to Report
The side effects of L-carnitine injections, from the approved levocarnitine label and the trials: injection-site soreness, nausea, vomiting and gastritis, fishy body odour, seizures, warfarin and INR, hypersensitivity, kidney impairment and the TMAO question, who should not take it, and when to message your care team or call 911.
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