Peptides / Category
Vitamin / Cofactor Peptide Testing
Injectable cofactors and lipotropic blends commonly under-deliver active content. We quantify each component, confirm form (e.g. reduced vs. oxidized glutathione), and screen for endotoxin.
Recommended Panel
- ✓HPLC quantitation per component
- ✓LC-MS identity
- ✓Endotoxin (LAL)
Common Impurities to Watch For
Oxidized glutathione (GSSG), wrong B12 form, low-concentration fills, endotoxin.
Vitamin / Cofactor peptides we test (5)
Cyanocobalamin (Vitamin B12)
1355.37 g/mol
Most common pharmaceutical form of B12 for injectables.
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Glutathione (Reduced)
307.32 g/mol
Reduced L-glutathione (GSH); tripeptide antioxidant central to redox balance.
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L-Carnitine
161.20 g/mol
Quaternary ammonium compound for fatty-acid mitochondrial transport.
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Lipo C B12
Multi-component
Lipotropic injectable: choline, L-carnitine, L-inositol, L-methionine, methyl-B12.
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Methylcobalamin (Methyl-B12)
1344.38 g/mol
Active methylated form of B12; common in compounded blends.
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