Compare prices and buy MIC-B12 from 2 research peptide vendors - also called suppliers or sources. Updated daily.
A lipotropic vitamin-and-amino-acid injection blend, not a peptide, combining L-methionine, inositol and choline (the trio compounding pharmacies abbreviate as MIC) with vitamin B12, given as methylcobalamin on labels that name the form. Methionine is the starting material for S-adenosylmethionine, the main biological methyl donor, choline is needed to make phosphatidylcholine, inositol is the precursor of phosphatidylinositol signaling lipids, and methylcobalamin is the cofactor of methionine synthase. Unlike Lipo-C formulas it contains no L-carnitine, although vendors use the two names loosely and the formula varies by vendor, so the mixture has no CAS number. No FDA-approved drug combines these ingredients, and no controlled trial of the combination is registered on ClinicalTrials.gov. Sold as a research-use product.
For research purposes only. Not medical advice.
MIC-B12 is not a peptide. It is a lipotropic injection formula of four small molecules: L-methionine, inositol and choline, the trio compounding pharmacies abbreviate as MIC, plus vitamin B12. Listing names include Lipo-B, Lipo-Pure and MIC-12. As a mixture it has no CAS number, no pharmacopeia defines it, and the formula is whatever each label states. PeptideScouter catalogues it beside Lipo-C, a related family sold from the same research-peptide catalogs, and that page explains where the word lipotropic comes from.
The dividing line is L-carnitine. PeptideScouter indexes the four-ingredient formula of methionine, inositol, choline and B12 here, and formulas that add L-carnitine, often with arginine or other B vitamins, under Lipo-C. Each listing is filed by the ingredient list on its product page or label, not its name, because vendors' names do not track their ingredients.
Each ingredient has a defined place in cell chemistry.
Three of the four therefore converge on one reaction, the regeneration of methionine from homocysteine, the point where choline, methionine and folate metabolism interact (Zeisel and da Costa). Inositol sits outside that loop, and its tie to the other three is the older animal work on liver fat that the Lipo-C page describes. This biochemistry describes the ingredients, not the injected mixture, and the combination is a compounding and market convention rather than a pharmacological one. The Vitamin B12 page covers how cells process the different B12 forms.
Searches of ClinicalTrials.gov and Europe PMC on November 3, 2026 found no controlled trial of an injection combining methionine, inositol, choline and vitamin B12, whether measuring body weight or any other outcome. The Lipo-C page records the same gap for the three-ingredient core.
No FDA-approved drug combines these four ingredients, and Drugs@FDA lists no approved product containing inositol at all. Because no approved product exists, a lipotropic injection dispensed in US pharmacy practice is a compounded drug, and FDA states that compounded drugs are not FDA-approved, which means it does not verify their safety, effectiveness or quality before they are marketed.
Two FDA warning letters to outsourcing facilities, the compounders that register with FDA under section 503B, name products in this family. An April 2025 letter cites aseptic-processing lapses during the filling of the "Lipo-B" injection described above, and a January 2026 letter lists "LIPO (MIC) + B" among products whose labels lacked the drug's established name and dosage form.
Cyanocobalamin and hydroxocobalamin are the forms in FDA-approved B12 injections, while methylcobalamin, the form named on the MIC-B12 labels that specify one, has no US drug approval. Compounding status is read per ingredient and per pathway, on the Lipo-C page for methionine, inositol and choline and on the B12 pages for each form. None of the four appears in Category 2, FDA's list of nominated bulk substances that raise significant safety risks, under either pathway.
MIC-B12 is sold mainly as a ready-to-use liquid, priced by volume in milliliters, and also as a freeze-dried powder. PeptideScouter computes a price per milligram only for vials labelled by mass, so the liquids appear in the price table and on no per-milligram surface. Some product pages state no amount for any ingredient, and a milligram total for a mixture adds four different molecules in whatever proportions one maker chose, so two such figures would not compare like with like. A freeze-dried vial labelled by mass does receive a per-milligram figure, with the same caveat.
MIC-B12 is a four-ingredient formula of L-methionine, inositol, choline and vitamin B12. PeptideScouter indexes formulas that add L-carnitine, often with arginine or other B vitamins, under Lipo-C instead. Vendors use the names loosely: a product called Lipo-B can contain L-carnitine, a carnitine-free MIC-B12 can be marketed as Lipo-C, and a compounder's Lipo-B named in an FDA warning letter contains no inositol. PeptideScouter assigns each listing by the ingredient list on its product page or label, not by its name.
No. MIC-B12 combines the amino acid L-methionine with inositol, choline and vitamin B12, all small molecules, and none of them is a peptide. As a mixture with no fixed formula it has no CAS number. PeptideScouter catalogues it because research-peptide vendors sell it from the same catalogs as their peptides.
Many MIC-B12 listings are ready-to-use liquids sold by volume, in milliliters, and PeptideScouter computes a price per milligram only for vials labelled by mass. The liquids still appear in the price table. A milligram total for this formula adds four different molecules in proportions each maker chooses, and some product pages state no amounts at all, so per-milligram figures for two vendors' versions would not be comparable.
No. No FDA-approved drug combines methionine, inositol, choline and vitamin B12, and Drugs@FDA lists no approved product containing inositol. A lipotropic injection dispensed in US pharmacy practice is a compounded drug, and FDA states that compounded drugs are not FDA-approved. FDA warning letters to two outsourcing facilities, dated April 2025 and January 2026, cite lipotropic injections in this family for aseptic-processing and labeling problems. Of the B12 forms, cyanocobalamin and hydroxocobalamin are in FDA-approved injections, while methylcobalamin has no US approval.
PeptideScouter found no such trial. Searches of ClinicalTrials.gov and Europe PMC on November 3, 2026 returned no controlled trial of an injection combining methionine, inositol, choline and vitamin B12. Each ingredient has an established role in metabolism, but that biochemistry describes the individual molecules and is not evidence about the combined injection.
MIC-B12 is sold by 2 research peptide vendors indexed on PeptideScouter, with 2 tracked listings compared per vendor in the table above. Pricing is normalized and refreshed daily.
All 2 indexed research peptide vendors currently have MIC-B12 in stock. Stock state is refreshed daily from each vendor's catalog.
Peptide Titans currently lists MIC-B12 at $6.50/mg, the lowest listed price across 2 tracked research peptide vendors. With current vendor discount codes applied, the lowest effective price is $5.85/mg.
Discount codes are issued per vendor rather than per peptide, so any code applies across that vendor's whole catalog. All 2 vendors listing MIC-B12 publish a PeptideScouter code, worth 10% to 20% off. Applied, the lowest effective price falls from $6.50/mg listed to $5.85/mg at Peptide Titans. Each vendor's code is shown beside its price in the table above.
2 research peptide vendors currently list MIC-B12 on PeptideScouter. We track 2 listings across size and kit variants.
