Lipotropic Injections: What Is in MIC and B12 Shots, and Do They Work?

Lipotropic injections, often sold as “lipo shots” or MIC injections, are shots offered by med spas and weight-loss clinics that usually combine methionine, inositol and choline, often with vitamin B12 and sometimes L-carnitine. They are compounded products, not FDA-approved for weight loss, and a search of the medical literature found no randomized controlled trials in people showing that they reduce body fat. Vitamin B12 injections are FDA-approved, but only for B12 deficiency caused by poor absorption, such as pernicious anemia.

Peptide Labs does not sell lipotropic, MIC or B12 injections. This article is general information, not medical advice. A licensed healthcare provider can check whether a vitamin deficiency is present.

What are lipotropic injections?

“Lipotropic” is an old term for nutrients that help move fat out of the liver. The idea comes from choline: the NIH Office of Dietary Supplements explains that choline is needed to transport fats out of the liver, and that in choline deficiency fat builds up there, which can lead to fatty liver disease. That is a liver effect seen in deficiency, not evidence that extra choline removes body fat from the belly or thighs. The table summarizes the usual ingredients.

Recipes vary by clinic. Some add other B vitamins, amino acids or minerals. For background on carnitine, including what the oral studies found, see our guides to L-carnitine and acetyl-L-carnitine. The approved carnitine injection, Carnitor, is labeled for intravenous use only, for carnitine deficiency linked to inherited metabolic disorders or dialysis.

MIC injections and their FDA status

MIC injections are not FDA-approved drugs. A large compounding pharmacy that makes them describes its version as a compounded formula available only with a prescription, and states plainly that it and similar lipotropic formulas are not FDA-approved. The FDA explains that it does not verify the safety, effectiveness or quality of compounded drugs before they are marketed, and that poor compounding practices can cause contamination or a product with too much or too little active ingredient.

This matters most for sterile products given by needle. In 2012, contaminated steroid injections from a single compounding pharmacy caused a U.S. outbreak of fungal meningitis and other infections with 753 cases and 64 deaths, according to the CDC. That outbreak did not involve lipotropic shots, but it shows why sterility and licensing matter for any compounded injection.

B12 injections for weight loss: what the evidence says

Vitamin B12 is the most common ingredient in these shots, and many clinics also sell B12 shots for weight loss on their own. The FDA-approved cyanocobalamin injection label lists one use: vitamin B12 deficiency caused by poor absorption. Examples it gives include pernicious anemia, stomach or bowel surgery, certain gut disorders, fish tapeworm and some cancers of the pancreas or bowel. The label adds that higher needs, such as in pregnancy, can usually be met by mouth.

The NIH fact sheet on B12 notes that the vitamin is often promoted as an energy booster because of its role in energy metabolism, but that supplementation does not appear to improve performance or endurance in people whose B12 status is adequate. Weight loss is not listed as a benefit; it is listed as a possible sign of deficiency, along with fatigue and numbness or tingling. We found no randomized trials showing that B12 injections cause weight loss in people without a deficiency.

Some people do need B12 checked. The NIH lists older adults, people with pernicious anemia, people who have had stomach surgery, including weight-loss surgery, vegetarians and vegans as higher-risk groups, and notes that metformin and acid-reducing medicines can lower B12. A blood test, not a shot menu, is how deficiency is found.

Does any study show lipotropic shots work?

On September 30, 2026 we searched PubMed for studies of lipotropic, MIC and B12 injections and weight loss. The results were animal studies in poultry, cattle and dairy cows, laboratory work and unrelated surgical reviews. None was a randomized controlled trial in people testing these shots for weight. Clinic programs often pair the shots with a calorie-restricted diet and exercise plan, which makes it impossible to tell whether any weight change comes from the injection.

Lipo injections vs fat-dissolving injections

“Lipo injections” can mean two different things, and the difference matters. Lipotropic shots are vitamin and amino acid mixtures claimed to work through metabolism. Fat-dissolving injections are designed to break down fat at the spot where they are given.

• Kybella (deoxycholic acid) is the only FDA-approved fat-dissolving injection. It was approved in 2015 for moderate to severe fullness under the chin in adults. In a September 15, 2026 safety communication, the FDA added label warnings about serious reactions when it is used elsewhere on the body, including blurred or reduced vision, nerve and muscle damage, numbness and difficulty walking, citing 129 cases since 2015.
• Unapproved fat-dissolving products sold as Aqualyx, Lipodissolve, Lipo Lab, Kabelline and others usually contain phosphatidylcholine and sodium deoxycholate. In December 2023 the FDA warned of permanent scars, serious infections, skin deformities, cysts and deep, painful knots, some after shots given at clinics or med spas by people who may not have been properly licensed.
• Lipodissolve warning letters: on April 7, 2010, the FDA sent warning letters to six U.S. medical spas, and a cyber letter to a company in Brazil, over false or misleading claims that lipodissolve was safe and effective.

Safety risks of lipotropic shots

Because these products are compounded and recipes vary, there is no single label listing their risks. Known risks come from the ingredients and from how injections are made and given:

• Allergic reactions. The cyanocobalamin injection label reports anaphylactic shock and death after B12 given by needle, and lists sensitivity to cobalt or B12 as a reason not to use it.
• Contamination and wrong strength. The FDA warns that poor compounding can lead to contaminated products or the wrong amount of ingredient.
• Injection-site problems. Pain, swelling, lumps and infection are possible with any shot.
• Specific conditions. The B12 injection label warns of rapid optic nerve damage in early Leber’s disease, and notes that some products contain benzyl alcohol and aluminum, which can build up when kidney function is reduced.
• High choline intakes. The NIH links very high choline intake with fishy body odor, vomiting, heavy sweating, low blood pressure and liver toxicity.

Anyone who is pregnant, has kidney disease, takes several medicines or has had a reaction to vitamin injections should talk to a healthcare provider first.

Options with stronger evidence

If the goal is weight loss, the options with the strongest trial evidence are FDA-approved medicines used with diet and activity changes; our guide to weight loss injections explains which shots are approved and which are not. For a look at metabolism claims, see how to boost metabolism, and for pills marketed for fat loss, see do fat burners work.

Frequently Asked Questions

Peptide Labs does not sell these drugs or injections. This article is general information, not medical advice. Read the Medication Guide or label that comes with any prescription, and ask a pharmacist or licensed prescriber how this information applies to you.

Last reviewed September 2026.

Related guides: L-Carnitine Benefits: What the Research Shows, Side Effects and Forms, Weight Loss Injections: What Is FDA-Approved and What Is Not, Do Fat Burners Work? Thermogenic Ingredients, Evidence and Risks, B12 Benefits: What Vitamin B12 Does, Who Runs Low and Which Form.