Fat Blaster
Lipotropic injection · MIC injection · Skinny shot
'Fat Blaster' is a product name used by med-spas and compounding pharmacies for a lipotropic injection. It is not a defined substance. Two clinics selling it are not necessarily selling the same thing, and the name tells you nothing about the contents.
The usual base is the MIC combination of methionine, inositol and choline, often with vitamin B12 added for colour and for the energy claim, and sometimes L-carnitine or B-complex vitamins. These are nutrients, and the pharmacology of each is reasonably well understood.
What is not established is that injecting them causes weight loss. There is no controlled trial of a lipotropic injection producing fat loss in people who are not deficient in the nutrients involved. Where these injections are given as part of a programme, that programme also includes a calorie deficit, and the deficit is doing the work.
The practical advice this page can give is to ask for the actual formulation and the amounts. If a clinic will not tell you what is in it, that is the answer to the question you were asking.
How it works
Methionine is an essential amino acid involved in methylation and in the liver's handling of fat. Choline is required to package fat into VLDL particles for export from the liver. That is a genuine role, and it is why choline deficiency causes fatty liver.
Inositol participates in cell signalling, including in insulin pathways. Vitamin B12 is required for energy metabolism and nerve function.
Every one of those roles is real in the context of deficiency. None of them constitutes a mechanism by which injecting the nutrient into someone with normal levels removes stored fat.
'Lipotropic' means fat-mobilising in the liver. It has been read as fat-burning throughout the marketing, and those are not the same claim.
Regulatory status — United States
Not an approved medicine. Sold as a compounded preparation, which means it is mixed by a pharmacy for a specific patient rather than manufactured and reviewed as a product. The FDA does not review compounded preparations for safety or effectiveness before they are sold.
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
Community practiceWhat it is sold for.
EvidenceNo controlled trial has shown that lipotropic injections cause weight loss in people who are not deficient in the components.
Correcting a documented deficiency
Published reviewWhere injected nutrients genuinely have a role.
EvidenceB12 injections treat B12 deficiency. That is a real diagnosis made on bloodwork. That is a different intervention from a weight-loss shot.
Identity and clearance
Molecule
- Class
- Not a peptide, and not a single substance: a compounded blend of nutrients
Contents vary between pharmacies. The name is a product name.
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 | IntramuscularThe figure describes a typical B12 component. The rest of the blend is not standardised, so no meaningful dose range can be stated for the product as a whole. That is the honest answer, not an omission. | — | 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
Lipotropic blends sting more than most intramuscular injections.
- Nausea and gastrointestinal upsetCommunity practice
Reported
- Reactions to an unlisted componentCommunity practice
Unquantifiable
You cannot assess a reaction risk against an ingredient list you do not have.
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
This is the central problem with the product. Without knowing what is in it and how much — you cannot check it against an allergy — a medication, or a condition. Nor can you compare what one clinic charges against what another is actually giving you.
- Kidney or liver impairmentUse caution
Amino acid and nutrient loads are handled by the kidneys and liver. Without knowing the amounts, the load cannot be assessed.
- Pregnancy and breastfeedingAvoid
No safety data for the blend, and the contents are not standardised enough for that data to be meaningful even if it existed.
- Relying on it for weight lossUse caution
No controlled trial supports it. If a programme includes these injections and produces weight loss, the calorie deficit in the programme is the part with evidence behind it. The injections are the part you are paying extra for.
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.
- It is a product name, not a formula. Ask what is in it and in what amounts.
- No controlled trial shows lipotropic injections cause weight loss in people who are not deficient.
- The components are genuine nutrients with genuine roles. Having a role in fat metabolism is not the same as causing fat loss.
- If it comes with a diet plan, the diet plan is the intervention.
- B12 injections do treat B12 deficiency, which is diagnosed on bloodwork and is a separate matter entirely.
Storage and handling
- Freeze-dried powder
- Supplied as a solution rather than a powder. Refrigerated, per the compounding pharmacy's instructions.
- After mixing
- Nothing to reconstitute. Compounded preparations carry a beyond-use date rather than a manufacturer's expiry, and it is usually short.
- Long-term, frozen
- Not applicable.
With other peptides
- Lipo-Ccaution
Different names for substantially the same category of compounded lipotropic injection. Buying both means paying twice for overlapping ingredients you have not seen listed.
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 vitamin B12. It is not an indicator of potency of anything else in the vial.
No ingredient list or amounts
A compounded preparation should come with a formulation. Ask for it in writing before paying for a course.
Cloudiness or particles
Discard it.
Questions
- What is actually in it?
- That depends on the clinic. Usually methionine, inositol and choline, often with B12, sometimes L-carnitine or B-complex. The name is not regulated and does not specify a formula. Which is why asking for the written formulation is the single most useful thing you can do here.
- Does it work?
- There is no controlled trial showing weight loss from lipotropic injections in people who are not deficient in the components. Where these are given alongside a calorie-restricted programme, the programme is what produces the result.
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. Roles in hepatic lipid metabolism are established but do not extend to fat loss in replete individuals.
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
Lipo-C
The same compounded lipotropic injection under a different name, usually with L-carnitine added. The evidence position is identical: none.
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.
Retatrutide
An investigational once-weekly triple agonist acting on the GLP-1, GIP and glucagon receptors. Not approved anywhere.
Next
What to do with Fat Blaster
- Keep a record of itTurn a dose and a schedule into a protocol, then log what you actually take. Fat Blaster 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 Fat Blaster 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