Compounded injections containing methionine, inositol, and choline, often with B12 or L-carnitine. Marketed as fat-burning or metabolic shots. These nutrients have biologic roles, but evidence for meaningful weight loss from MIC injections is limited.
Lipotropic or MIC injections are compounded blends of methionine, inositol, and choline. Clinics often add vitamin B12, B-complex, or L-carnitine and sell the result as a “skinny shot,” “metabolic shot,” or “fat burner.” Each ingredient participates in normal metabolism. That does not demonstrate that an IM blend causes clinically meaningful fat loss in a nutrient-replete adult.
What the ingredients do
Methionine is an essential amino acid and methyl donor. Choline is needed for cell membranes, acetylcholine, and hepatic lipid transport; true choline deficiency can contribute to fatty liver. Inositol participates in cellular signaling and has evidence in selected oral uses such as some PCOS outcomes—not equivalent evidence for injected MIC. L-carnitine shuttles fatty acids into mitochondria; deficiency treatment is different from adding it to a weight-loss package.
Evidence and limits
There is no robust body of randomized evidence showing that routine MIC injections independently produce durable weight loss. They are not GLP-1 medications, do not suppress appetite in the same way, and should not be presented as comparable. Any program result may come from dietary change, coaching, exercise, or concurrent prescription drugs. Because MIC products are typically compounded, dose and ingredient transparency matter.
Ask for the full formula and dose. Bring current supplements to avoid duplicate B-complex or B12. Do not stop prescribed weight-management medications.
Minor soreness or bruising is common. There is no expected downtime.
Injection-site pain or infection, allergic reaction, nausea, headache, compounded-dose error, and financial harm from packages sold as proven fat-loss therapy. Excess methionine or choline may have adverse effects at high doses.
NIH Office of Dietary Supplements. Choline fact sheet for health professionals.
https://ods.od.nih.gov/factsheets/Choline-HealthProfessional/NIH Office of Dietary Supplements. Carnitine fact sheet for health professionals.
https://ods.od.nih.gov/factsheets/Carnitine-HealthProfessional/FDA. Human drug compounding: questions and answers.
https://www.fda.gov/drugs/human-drug-compounding/compounding-and-fda-questions-and-answersCDC. Injection Safety.
https://www.cdc.gov/injection-safety/© 2026 Longevity Clinic Finder. All rights reserved.
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Adults who understand MIC is an elective adjunct with uncertain independent weight-loss benefit. Deficiency treatment should target the deficient nutrient directly.
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