Lipo-C is another compounding-pharmacy name for a lipotropic injection. The 'C' generally denotes L-carnitine added to the methionine, inositol and choline base, though as with every product in this category the formulation depends on who mixed it.
It exists as a separate page, not a redirect because people buy it as a distinct product, log it as one, and compare prices between it and 'Fat Blaster' as though they were different interventions. Usually they are not.
The evidence position is the same. No controlled trial has shown that injecting these nutrients produces weight loss in people who are not deficient in them. The addition of L-carnitine does not change that. Carnitine's own weight-loss evidence is weak, and it has its own page here.
How it works
Methionine, inositol and choline as in any lipotropic blend: real roles in methylation, signalling and hepatic fat export, none of which amounts to a mechanism for removing stored fat in a replete person.
L-carnitine transports long-chain fatty acids into mitochondria for oxidation. That is a genuine and essential step. In people with normal carnitine levels it is also not the step that limits fat oxidation. This is why supplementing it does not increase fat loss.
Vitamin B12, where included, is required for energy metabolism. It corrects deficiency and does nothing detectable in someone who is replete.
Regulatory status — United States
Not an approved medicine. A compounded preparation, mixed by a pharmacy rather than manufactured as a reviewed product. The FDA does not review compounded preparations for safety or effectiveness before sale.
Last reviewed 18 Aug 2026. Regulatory positions in this category change frequently; we date this line so you can see how current it is.
What it is studied for
Each entry states the evidence behind it. We do not rank indications by effectiveness — for most compounds here, that would be a claim nobody can support.
Weight loss
Published reviewWhat it is sold for.
EvidenceNo controlled trial supports it. Adding L-carnitine to the blend does not change the position, since carnitine's own weight-loss evidence is weak.
Identity and clearance
Molecule
- Class
- Not a peptide: a compounded blend of amino acids, vitamins and carnitine
Contents vary between pharmacies.
Dose protocols reported in sources
Displayed for reference only. Every row says where it came from, and a trial protocol and a community convention are not the same kind of information. None of this is fed into the calculator, and none of it is a recommendation.
| Goal | Dose | Frequency | Route | Units | Source | Start this protocol |
|---|---|---|---|---|---|---|
| Typical clinic schedule | 1 mg | Weekly | IntramuscularAs with any compounded blend, no standardised dose exists for the product as a whole. The figure describes a typical B12 component. | — | Community practice | Start this |
Start this copies a row into a protocol of your own, which you can then edit. Where a source gave a dose range or an ambiguous frequency, those fields arrive empty — we will not pick a number on your behalf.
CheckRows marked community practice describe what people commonly do, drawn from public discussion. They are not derived from any trial and are not evidence that a dose is safe or effective.
Safety
Reported effects
- Injection site painCommunity practice
Common
- Nausea, and a fishy body odourCommunity practice
Reported
The odour is carnitine, metabolised to trimethylamine. Harmless and socially unwelcome.
- Reactions to an unlisted componentCommunity practice
Unquantifiable
When to stop
- Any allergic response: rash, hives, facial swelling or difficulty breathing. Seek urgent care.
- An injection site that becomes hot, spreading or produces pus.
- Persistent nausea.
Interactions and situations that need care
- Buying it without an ingredient listAvoid
Without the formulation and the amounts you cannot check it against an allergy, a medication or a condition, and you cannot tell whether it differs from a cheaper product under another name.
- Seizure disorderUse caution
L-carnitine has been associated with increased seizure frequency in people with a seizure disorder. Whether a given blend contains it, and how much, is exactly the information usually missing.
- Kidney impairmentUse caution
Carnitine and amino acid loads are cleared renally, and the amounts here are unstated.
- Pregnancy and breastfeedingAvoid
No safety data for a preparation whose contents are not fixed.
What to expect
HonestlyThere is no human efficacy data for this compound, so there is no evidence-based timeline to give. Any site publishing a week-by-week schedule of expected effects has invented it.
- Substantially the same product as other lipotropic injections sold under other names.
- No controlled trial shows weight loss from injecting these nutrients in replete people.
- L-carnitine's presence is the usual difference, and carnitine's own weight-loss evidence is weak.
- The fishy odour some people notice is carnitine metabolism. Harmless.
- Ask for the written formulation. It is the only way to know what you are comparing.
Storage and handling
- Freeze-dried powder
- Supplied as a solution. Refrigerated, per the pharmacy's instructions.
- After mixing
- Nothing to reconstitute. Compounded preparations carry a short beyond-use date rather than a manufacturer's expiry.
- Long-term, frozen
- Not applicable.
With other peptides
- Fat Blastercaution
Different names for substantially the same category of compounded lipotropic injection. Buying both means paying twice for overlapping ingredients you have not seen listed.
- L-Carnitinecaution
Most Lipo-C formulations already contain L-carnitine. Taking it separately on top means an unknown total, since the blend does not state its amount.
Checking your vial
Research chemicals carry no manufacturing standard, so what the vial looks like is often the only quality signal available before you use it. More on assessing quality and COAs.
Pink or red solution
The colour is B12, and says nothing about the rest.
No ingredient list or amounts
Ask for the written formulation before paying for a course.
Cloudiness or particles
Discard it.
Questions
- How is it different from Fat Blaster?
- Usually the addition of L-carnitine, and often not even that. Both are compounding-pharmacy names for lipotropic injections, and neither specifies a formula. Comparing them means comparing the written formulations, not the labels.
- Why do I smell fishy after it?
- L-carnitine is metabolised to trimethylamine, which has that smell. It is harmless and it is dose-related.
References
Lipotropic agents and injectable nutrient therapy: evidence for weight management
Nutrition and obesity medicine literature, 2019 · Narrative review
Adults seeking weight loss
No controlled evidence that injected methionine, inositol, choline or B12 produces weight loss in the absence of deficiency.
L-carnitine supplementation: metabolic effects and safety
Nutrition and metabolism literature, 2020 · Systematic review and meta-analysis
Adults across supplementation trials
Small effects on body weight in meta-analysis, of uncertain clinical significance and largely absent in trials of better quality. Gastrointestinal effects and trimethylamine-related body odour are the common adverse effects; increased seizure frequency has been reported in people with seizure disorders.
Clinic and community practice, unverified
Med-spa marketing, compounding pharmacy menus and forums, 2026 · Anecdote
Self-selected, unverified
Formulations and schedules described outside any trial. Compounded blends vary between pharmacies, so two products under the same name are not necessarily the same thing.
Related compounds
Fat Blaster
A marketing name, not a formula. What is in the syringe varies by clinic, and no version of it has been shown to cause weight loss.
L-Carnitine
An essential cofactor for burning fat, and not the step that limits it. Approved for genuine carnitine deficiency; sold by injection for weight loss on weak evidence.
Semaglutide
A long-acting GLP-1 receptor agonist approved for type 2 diabetes and for weight management, dosed once weekly.
Tirzepatide
A once-weekly dual agonist that activates both the GIP and GLP-1 receptors, approved for type 2 diabetes and for weight management.
Next
What to do with Lipo-C
- Keep a record of itTurn a dose and a schedule into a protocol, then log what you actually take. Lipo-C is filled in for you.
- See what it costsPer-milligram prices read from vendor sites and confirmed by a person, so vial sizes compare.
- Check a combinationWhat our profiles record about Lipo-C alongside each other compound — including the pairs where nothing is recorded.
Keep this page honest
If something here is wrong, out of date, or missing a source, tell us and we will fix it and say that we did.
This page is educational. It describes what published research reports, not what you should do. Peptides discussed here are largely not approved for human use, and nothing on Bioalmanac is medical advice. No clinician reviews these pages.
Page last updated 18 Aug 2026