Important limitations
- Individual claims and source links have not yet completed editorial verification.
- Evidence level, applicable study model, formulation, route and population remain unassigned.
MIC B12
MIC B12 is a lipotropic amino formulation that supports research into fat metabolism, methylation, and energy regulation.
Reported protocols for MIC B12
What published studies and recent community write-ups report about amounts, timing and course length. 4 clinical and 4 community-reported rows, each linked to its source. These are descriptions of what others report, not instructions, and nothing here is medical advice.
| Context | Dose | Frequency | Route | Course | Source |
|---|---|---|---|---|---|
| Clinical4 rows | |||||
| Ingredient: choline, placebo-controlled trial in parenteral nutrition15 adults dependent on long-term home parenteral nutrition | 2 g choline chloride per day | Daily, added to the nutrition infusion | Intravenous | 24 weeks, with follow-up to week 34Steatosis returned within 10 weeks of stopping | Journal of Parenteral and Enteral Nutrition (PubMed)2001 |
| Choline given intravenously to people whose nutrition contained none improved liver density on CT from week 4 and lowered liver enzymes, and the fatty liver came back after it was withdrawn. It is the strongest human evidence behind the word lipotropic, but it concerns deficiency correction at about twenty to forty times the choline in a weekly MIC shot. | |||||
| Ingredient: inositol, meta-analysis of 15 trials on body mass index891 adults, mostly women with polycystic ovary syndrome or metabolic syndrome | 600-4,450 mg per day | Daily | Oral | 6-48 weeksNot applicable | Obesity Science and Practice (PubMed Central)2022 |
| Daily oral inositol lowered BMI by a pooled 0.41 kg/m2, with larger effects in people with overweight or obesity. Nearly all the data come from women with PCOS taking gram-level doses, so the result says little about 50-100 mg injected once a week. | |||||
| Ingredient: vitamin B12, FDA label for cyanocobalamin injectionAdults with pernicious anemia or B12 malabsorption | 100 mcg per dose | Daily for 6-7 days, then on alternate days for 7 doses, then every 3-4 days for 2-3 weeks, then monthly for life | Intramuscular or deep subcutaneous; intravenous use is to be avoided | Lifelong in pernicious anemiaNot applicable | DailyMed, National Library of Medicine2024 |
| The approved injectable B12 is cyanocobalamin for diagnosed deficiency, and its maintenance dose of 100 mcg a month is a fifth to a tenth of what a single MIC shot usually contains. The blend's methylcobalamin has no US injectable label, and the label notes that B12 given intravenously is largely lost in urine. | |||||
| Ingredient: vitamin B12, intramuscular regimens in the NICE evidence reviewAdults over 16 with vitamin B12 deficiency in randomized trials | 1,000 mcg per injection (the only intramuscular dose found in the included trials) | Daily for 1 week then monthly; or three times a week for a month then monthly; oral comparators 100-1,000 mcg daily | Intramuscular, compared with oral tablets | Loading phase of 1-4 weeks, then monthly maintenanceNot applicable | National Institute for Health and Care Excellence2024 |
| The 2024 NICE review found that the optimal route, dose and frequency of B12 replacement have never been clearly established and that practice is guided by custom. Its trials treated confirmed deficiency, not weight, and used B12 alone rather than a lipotropic mix. | |||||
| Community-reported4 rows | |||||
| Standard clinic dose and typical concentrations | 1 mL, containing about 25-100 mg methionine, 50-100 mg inositol, 50-100 mg choline and 500-1,000 mcg B12 depending on the pharmacy | Once weekly | Intramuscular | For the length of a weight-loss program; most providers give the same dose regardless of body weightNone described | Community resource2026 |
| This 2026 guide calls the weekly 1 mL dose a convention adopted by weight-loss clinics in the early 2010s rather than a figure from any trial, and tabulates four common pharmacy formulations whose methionine content alone varies fourfold. It states plainly that no published clinical trial establishes an optimal dose for weight loss. | |||||
| Split-dose and loading-phase variants | 0.5 mL (split-dose formulation) or 1 mL (loading formulation with 100 mg each of methionine, inositol and choline and 1,000 mcg B12) | 0.5 mL twice weekly; or 1 mL twice weekly for 4 weeks, then weekly | Intramuscular | 4-week loading phase, then weekly maintenanceNone described | Community resource2026 |
| The same guide describes clinics that split the weekly volume into two injections or front-load the first month with twice-weekly dosing on the theory that extra methyl donors upregulate methylation enzymes. It presents that rationale as a hypothesis and notes that neither variant has been compared with the weekly standard. | |||||
| Clinic protocols for Lipo-C and MIC blends | 1 mL | Once weekly as the standard; twice weekly in some programs; 2-3 times weekly for the first 2 weeks where a loading phase is used | Intramuscular (deltoid, gluteus or lateral thigh) or subcutaneous | For the duration of a supervised weight-management program, often alongside a weekly GLP-1 injectionNone described | Community resource2026 |
| This 2026 explainer puts expected 12-week weight loss from diet and exercise at 2-5 kg and from semaglutide at 5-8 kg, and lists the MIC injection alone as having no established effect because no randomized trial exists. It says twice-weekly and loading schedules rest on tradition rather than evidence. | |||||
| Practitioner guidance on offering MIC | 1 injection per visit; the volume and the mg per mL of each ingredient are not stated because they vary by compounding pharmacy | Weekly, sometimes twice weekly early in a program | Intramuscular into the deltoid or gluteal muscle | No established clinical timelineNone described | Community resource2026 |
| Written for clinicians in 2026, this article frames MIC as an adjunct inside a supervised program and warns against the words fat burner or detox. It notes that the energy lift patients report in the first day or two is most plausibly B12 in people who were deficient and expectation in everyone else. | |||||
How a course is commonly described
- Weeks 1-4: optional loadingCommunity-reported
Clinics that use a loading phase give 1 mL twice a week (or 0.5 mL twice a week with a split-dose formulation) for the first two to four weeks. The guides describing this say it rests on a methylation hypothesis, not on a comparison with weekly dosing.
- Weekly maintenanceCommunity-reported
The standard pattern is 1 mL into a muscle once a week for as long as the program runs, often on the same day as a GLP-1 injection at a different site. Any energy change in the first days is attributed to B12 in people who were low in it; weight change is expected to follow the diet program over weeks to months.
- Clinical comparisonClinical
No trial describes a course for the combined shot. Labelled B12 replacement front-loads daily or thrice-weekly injections for one to four weeks and then drops to monthly, and the choline trial needed 24 weeks of daily 2 g doses before relapse was seen 10 weeks after stopping.
- The weekly 1 mL MIC shot is a clinic convention from the early 2010s. No randomized trial has tested the combined injection against placebo for weight or fat loss, and claims of specific trials circulating online could not be verified in PubMed.
- Choline and inositol evidence comes from daily gram-level doses in deficient or PCOS populations; B12 evidence concerns diagnosed deficiency. None of it tests small weekly doses in people with normal nutrient status.
- Compounded MIC products are not FDA-approved and their concentrations differ by pharmacy, so two vials labelled MIC B12 can contain very different amounts of each ingredient.
Sources for this section (7)
- Choline deficiency causes reversible hepatic abnormalities in patients receiving parenteral nutrition: proof of a human choline requirement: a placebo-controlled trial
- Inositol supplementation and body mass index: A systematic review and meta-analysis of randomized clinical trials
- Cyanocobalamin Injection, USP 1000 mcg/mL: Prescribing Information
- NG239 Vitamin B12 deficiency in over 16s: Evidence review E, vitamin B12 replacement
Plus 3 community resources (dosing guides, forum threads and vendor write-ups), reported above but not linked.
Overview
MIC B12 is the classic lipotropic injection: methionine, inositol and choline (the MIC trio) with vitamin B12, sold here as a ready-to-use vendor blend that lists the choline as CDP-choline (citicoline) and the B12 as methylcobalamin. Weight-loss clinics and med spas have offered compounded versions of this shot since at least the early 2010s, usually with cyanocobalamin and choline chloride, and the legacy sheet gives no amounts per millilitre; compounding-pharmacy versions typically carry 25-100 mg methionine, 50-100 mg inositol, 50-100 mg choline and 500-1,000 mcg B12 per mL. The ingredients have real roles in liver fat export and one-carbon metabolism, but no controlled trial has tested the combined injection for weight or fat loss, it has no FDA approval, and the only human data below concern single ingredients given at much larger daily doses, mostly to people who were deficient.
What researchers are exploring
These themes organize the educational information currently available. Individual claims remain under source review and are not treatment claims.
- 1
Methionine
Sulfur-containing amino acid and precursor to S-adenosylmethionine (SAMe); important for methylation and detoxification. Molecular Formula: C 5 H 11 NO 2 Molecular Weight: 149.21 g/mol
- 2
Inositol
Involved in lipid signaling and studied for roles in mood regulation and metabolic health. Molecular Formula: C 6 H 12 O 6 Molecular Weight: 180.16 g/mol
- 3
CDP-Choline
Involved in acetylcholine synthesis and brain membrane repair. Molecular Formula: C 14 H 26 N 4 O 11 P 2 Molecular Weight: 488.32 g/mol
- 4
Vitamin B12 (Methylcobalamin)
Coenzyme in DNA synthesis, methylation, and red blood cell formation. Molecular Formula: C 63 H 91 CoN 13 O 14 P Molecular Weight: 1344.4 g/mol PubChem CID: 10898559
- 5
Research
MIC B12 and Lipotropic Mechanisms MIC B12 is a composite research formulation composed of Methionine, Inositol, Choline, and Vitamin B12 (Methylcobalamin), each contributing to essential pathways of methylation, lipid…
What is known and what still needs verification
Available context is organized without assigning unsupported study models or evidence grades.
- Not graded
Methionine
Sulfur-containing amino acid and precursor to S-adenosylmethionine (SAMe); important for methylation and detoxification. Molecular Formula: C 5 H 11 NO 2 Molecular Weight: 149.21 g/mol
- Not graded
Inositol
Involved in lipid signaling and studied for roles in mood regulation and metabolic health. Molecular Formula: C 6 H 12 O 6 Molecular Weight: 180.16 g/mol
Limitations and unknowns
Sources
1 link carried over from the earlier page, awaiting verification.