Description

L-Selenomethionine USP

L-Selenomethionine USP is a high-purity, organic selenium compound used in pharmaceutical, nutraceutical, and clinical nutrition formulations to support antioxidant defense, thyroid function, and cellular protection. As the naturally occurring selenium analog of L-methionine, it offers superior bioavailability and reduced toxicity compared to inorganic selenium salts. L-Selenomethionine

• Is a USP-compliant organic selenium compound for regulated health applications
• Is incorporated into proteins in place of methionine for sustained selenium delivery
• Is used in oral supplements, prenatal vitamins, and clinical nutrition products
• Supports antioxidant enzymes (e.g., glutathione peroxidase), thyroid health, and immune regulation
• Is manufactured under Good Manufacturing Practice (GMP) conditions
• Is supplied with complete regulatory documentation including Certificate of Analysis (CoA) and supporting technical data

L-Selenomethionine is chemically similar to L-Methionine, with Selenium replacing the Sulfur atom. It is well absorbed in the small intestine and becomes incorporated into body proteins, serving as a selenium reserve for metabolic and enzymatic processes.

In pharmaceutical and nutritional applications, L-Selenomethionine USP is used in:

• Oral supplements and multivitamin formulations for antioxidant and thyroid support
• Prenatal and fertility supplements for healthy fetal development and reproductive health
• Clinical nutrition products targeting selenium-deficient states
• Immune modulation therapies and oxidative stress protection
• Research formulations in oncology and heavy metal detoxification

Compared to sodium selenite or selenate, L-Selenomethionine offers improved gastrointestinal tolerability, lower pro-oxidant activity, and better retention in tissues. It supports selenoprotein biosynthesis and helps neutralize reactive oxygen species (ROS) through enzymes like glutathione peroxidase and thioredoxin reductase.

CarboMer supplies L-Selenomethionine USP with precise control over selenium content, enantiomeric purity, heavy metals, and residual solvents. Each batch complies with United States Pharmacopeia (USP) specifications and is suitable for regulated dietary and pharmaceutical use.

The material is packaged in sealed, light- and moisture-protective, tamper-evident containers. Available in R&D, pilot, and commercial quantities. Minimum order quantities (MOQ), lead times, and documentation including CoA and SDS are available upon request.

Each batch is tested for identity (IR, HPLC), assay (selenium content and total compound), specific rotation, loss on drying, heavy metals (particularly arsenic, mercury, lead), and microbial limits. Certificates of Analysis (CoA), Safety Data Sheets (SDS), and full traceability documentation accompany every shipment.

As with all CarboMer trace minerals and amino acid-based actives, L-Selenomethionine USP is supported by regulatory expertise, formulation guidance, and secure global supply to help ensure consistent delivery of safe, bioavailable selenium supplementation.