A lipotropic injection combining methionine, inositol, choline, and cyanocobalamin (B12) for metabolic support and fat metabolism.
LIPO-C is a lipotropic injection formula containing a combination of methionine, inositol, choline (collectively known as MIC), and cyanocobalamin (vitamin B12). Lipotropic compounds are substances that promote the flow of fat and bile to and from the liver, supporting hepatic fat metabolism and helping prevent abnormal fat accumulation in the liver. The combination is widely used in weight management clinics as an adjunctive therapy to diet and exercise programs.
Each component serves a specific metabolic function. Methionine is an essential amino acid that acts as a lipotropic agent by assisting in the breakdown of fats, preventing fat buildup in the liver, and providing sulfur for the production of glutathione, the body's primary intracellular antioxidant. Inositol, a member of the B-vitamin family, is involved in fat transport and metabolism, insulin signal transduction, and serotonin modulation. Choline is essential for the synthesis of phosphatidylcholine, a major component of cell membranes and VLDL particles that transport fat from the liver. Vitamin B12 is critical for energy metabolism, red blood cell formation, and neurological function.
The MIC+B12 combination has been used in clinical weight management for decades. While individual components have well-established metabolic roles, the combination is designed to support multiple fat metabolism pathways simultaneously. The injectable route ensures complete bioavailability, bypassing the absorption limitations of oral supplementation, particularly for B12 in individuals with reduced intrinsic factor or gastrointestinal absorption capacity.
LIPO-C works through the synergistic action of four components, each targeting a different aspect of hepatic fat metabolism and energy production.
Methionine is converted to S-adenosylmethionine (SAMe), the body's primary methyl donor, which is required for phosphatidylcholine synthesis in the liver. Phosphatidylcholine is essential for VLDL assembly — the mechanism by which fat is exported from the liver. Methionine deficiency leads to hepatic fat accumulation. Additionally, methionine provides the sulfur atom for cysteine and glutathione synthesis, supporting hepatic detoxification and antioxidant capacity [1].
Myo-inositol is a precursor to phosphatidylinositol, a membrane phospholipid involved in insulin signal transduction. It has demonstrated insulin-sensitizing effects in polycystic ovary syndrome (PCOS) studies and supports hepatic lipid export via VLDL assembly. Inositol also modulates serotonin receptor sensitivity, which may influence appetite regulation and mood — relevant factors in weight management [3].
Choline is the most critical lipotropic factor. It is required for the synthesis of phosphatidylcholine, which constitutes the surface monolayer of VLDL particles. Without adequate choline, the liver cannot assemble and secrete VLDL, leading to fat accumulation (non-alcoholic fatty liver disease). Choline deficiency is remarkably common — over 90% of the U.S. population fails to meet the adequate intake level [2].
Vitamin B12 is a cofactor for methionine synthase (which regenerates methionine from homocysteine) and methylmalonyl-CoA mutase (which metabolizes odd-chain fatty acids and certain amino acids). B12 deficiency impairs both methylation capacity and mitochondrial fatty acid metabolism. The injectable route provides 100% bioavailability, critical for individuals with absorption issues [4].
LIPO-C dosing is straightforward as it comes in a pre-mixed, ready-to-use format. Standard dosing reflects decades of clinical weight management practice.
| Protocol | Dose | Frequency | Duration | Notes |
|---|---|---|---|---|
| Standard | 1 mL IM | 1–2x per week | Ongoing | IM in deltoid or gluteal region |
| Weight management | 1 mL IM | Twice weekly | During active weight loss | Combined with diet and exercise program |
| Maintenance | 1 mL IM | Once weekly | Ongoing | After reaching target weight |
LIPO-C comes as a ready-to-use sterile solution. No reconstitution is required.
10 mL multi-dose vial: Ready-to-use solution. Draw 1 mL per dose using a sterile syringe.
Doses per vial: 10 doses at 1 mL each
Needle gauge: 22–25 gauge, 1–1.5 inch for IM injection
Injection sites: Deltoid, vastus lateralis (outer thigh), or dorsogluteal
LIPO-C is administered via intramuscular (IM) injection. IM delivery ensures rapid absorption of all four components.
Rotate between injection sites to prevent tissue irritation. For twice-weekly protocols, alternate between left and right sides (e.g., left deltoid Monday, right deltoid Thursday). Allow each site at least one week between injections. The solution may appear pink to red due to cyanocobalamin (B12) — this is normal and expected.
LIPO-C requires light protection due to the light-sensitive B12 component. Otherwise, storage is straightforward.
LIPO-C is composed of naturally occurring nutrients and has an excellent safety profile. Side effects are generally mild and infrequent.
LIPO-C is a nutritional supplement combination, not a pharmaceutical drug. It is not a standalone weight loss treatment and should be used as part of a comprehensive program including proper nutrition and regular exercise. Individuals allergic to any component (particularly cobalt/B12) should not use this product. Contraindicated in individuals with Leber's disease (hereditary optic neuropathy) due to B12 content.
LIPO-C is commonly combined with other metabolic support compounds. Its role in hepatic fat processing makes it complementary to compounds that increase fat mobilization or oxidation.
LIPO-C supports hepatic fat processing (export via VLDL) while L-Carnitine handles mitochondrial fatty acid transport for oxidation. This combination addresses fat metabolism from liver to mitochondria.
| Compound | Dose | Frequency | Duration |
|---|---|---|---|
| LIPO-C | 1 mL IM | 1–2x per week | Ongoing |
| L-Carnitine | 200–600 mg IM | 3x per week | Ongoing |
LIPO-C is most effective when combined with active lifestyle management:
LIPO-C is available in 10 mL multi-dose vials from Heritage Labs USA, a U.S.-based research supplier with batch-level purity verification.