Weight & Metabolic
Lipo-C (Lipotropic / MIC Injection)
aka mic injection · lipotropic injection · fat burner shot · lipo shot · lipo-mic · skinny shot · mic plus · lipo-b
Grade
A clinic-mixed injection of everyday nutrients (methionine, inositol, choline, often with carnitine and B-vitamins) marketed as a fat-burner, with no controlled human evidence that the shot itself burns fat.
- Class
- Compounded injectable cocktail of nutrients (not a peptide) — typically Methionine, Inositol, Choline (MIC), often with L-carnitine and B-vitamins
- Evidence
- Grade D · Animal data only
- Sport / WADA
- The individual nutrients (methionine, inositol, choline, carnitine, B-vitamins) are not themselves on the WADA Prohibited List. However, under M2.2 WADA prohibits intravenous infusions and/or injections of more than 100 mL per 12-hour period unless legitimately received during hospital treatment, surgery or clinical diagnostic investigation — so a large-volume IV 'drip' version could breach the rules on volume grounds even though the ingredients are permitted. Intramuscular shots are typically well under that volume. Athletes should treat any compounded injectable with caution given contamination and mislabelling risk.
- Last reviewed
- 2026-06
Grade D · Animal data only
Why this grade
No randomised controlled trials show that injecting these nutrients causes meaningful fat loss in well-nourished people. The components have real biology, but the product as a fat-loss treatment is essentially unevidenced in humans.
What is it?
Lipo-C isn't really a peptide at all — it's a mixed jab of nutrients your body already gets from food, like a few B-vitamins, an amino acid called methionine, and choline (found in eggs). Clinics inject it and call it a 'fat-burner' or 'skinny shot'. The catch: there's basically no proper proof that injecting these things melts fat. The nutrients each do useful jobs in the body, but that's not the same as the injection making you slimmer. People who lose weight on these programmes are usually also dieting and exercising — and that's what's actually doing the work.
It's like topping up the oil and screenwash in a car that already has plenty, then claiming the top-up makes it go faster. Those fluids are genuinely needed for the engine to run — but adding more when you're not short doesn't add speed. The diet and exercise that come with the programme are the actual accelerator.
How is it meant to work?
The proposed mechanism is that 'lipotropic' nutrients help the liver mobilise and export fat. Choline and methionine are needed to make phosphatidylcholine, which the liver uses to package and ship out triglyceride as VLDL; without enough, fat accumulates in the liver (steatosis). L-carnitine shuttles long-chain fatty acids into mitochondria where they are burned for energy. Inositol participates in insulin signalling, and B-vitamins are cofactors in energy metabolism. The leap the marketing makes is from 'these nutrients are involved in handling fat' to 'injecting more of them makes you lose body fat' — a step that does not follow, because in a well-nourished person these pathways are not limited by a shortage of these substrates.
What's it studied for?
Research contexts. Not proven uses, and not recommendations.
Does the human evidence stack up?
There are no randomised controlled trials showing that a lipotropic/MIC injection produces clinically meaningful weight or fat loss independent of diet and exercise. The injection is not a licensed medicine for weight loss. Evidence cited by clinics is almost entirely about the individual nutrients — for example, choline depletion causing fatty liver, or inositol improving insulin sensitivity in PCOS — which addresses deficiency or specific metabolic conditions, not fat-burning in an otherwise replete person. Where people on MIC programmes lose weight, the programmes also impose calorie restriction and exercise, and increasingly the injection is bundled with GLP-1 drugs, so any weight change cannot be attributed to the shot. In short: the components are real and studied; the product as a fat-loss treatment is essentially untested in proper human trials.
What could go wrong?
- !Marketed as a 'fat-burner' with no controlled evidence it burns fat — the claim outruns the data.
- !Compounded/unlicensed: contents, concentration and sterility vary between clinics and aren't held to licensed-medicine standards.
- !Injection-site pain, bruising, redness and rare infection or abscess; intramuscular injections carry the usual risks.
- !Often sold as an add-on to GLP-1 drugs or alongside B12, making it impossible to know what (if anything) it's contributing while you pay for it.
- !Methionine loading can transiently raise homocysteine; the relevance of repeated injections is poorly characterised.
- !Opportunity cost: money and faith placed in an unproven shot instead of interventions that actually work.
Is it legal in the UK?
In the UK an injectable product is a medicinal product, so a lipotropic/MIC injection used clinically falls under the Human Medicines Regulations 2012 and the MHRA. These blends are not licensed medicines — they are unlicensed compounded 'specials' or imported products. GMC guidance says unlicensed medicines should only be used where a licensed option can't meet clinical need, with documented rationale, informed consent and monitoring; using an unproven nutrient injection purely for cosmetic weight loss sits awkwardly against that. The MHRA has repeatedly warned about unlicensed injectable 'weight-loss' products bought online or given in non-clinical settings, citing contamination, dosing and quality concerns. There is no NHS endorsement of lipotropic injections for any indication.
Key trials
- · None identified
No registered RCT isolating lipotropic/MIC injection for weight loss
Searches of trial registries and PubMed return no adequately controlled trial testing the injection's independent effect on body weight or fat mass.
Sources
- 01Choline: an essential nutrient for public health — Zeisel SH, da Costa KA, Nutrition Reviews (2009)
Establishes choline's essentiality and that deficiency contributes to liver disease/fat accumulation — the deficiency-correction biology behind the 'lipotropic' rationale, not evidence of fat-burning in replete people.
- 02Effects of Inositol(s) in Women with PCOS: A Systematic Review of Randomized Controlled Trials — Unfer V, Nestler JE, Kamenov ZA, Prapas N, Facchinetti F, International Journal of Endocrinology (2016)
Shows inositol improves insulin sensitivity in PCOS — a specific metabolic context, not general weight loss from injection.
- 03Lipotropic (MIC) injections for weight loss — search of published human trials, PubMed
No randomised controlled trials demonstrate weight loss from the injection itself; illustrates the absence of direct human efficacy evidence.
- 04WADA Prohibited List — M2 Chemical and Physical Manipulation (intravenous infusions and injections, >100 mL/12 h threshold), World Anti-Doping Agency
The >100 mL per 12 hours infusion/injection rule that can catch large-volume IV nutrient drips.
- 05MHRA warnings on unlicensed injectable weight-loss products, MHRA / GOV.UK
Context for UK regulatory status and safety warnings on unlicensed injectables.
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