Overview
Bovine Liver Extract is a biologically active preparation obtained from beef liver through enzymatic hydrolysis or other extraction methods. It is valued for its high concentration of nutrients, including vitamin B12, iron, folic acid, and liver-derived growth factors. Historically, it has been used in traditional medicine and modern biochemistry for its restorative and metabolic support properties. In industrial applications, the extract is standardized to ensure consistent nutrient profiles, making it a key ingredient in pharmaceuticals (e.g., anemia treatments) and specialty cell culture media. Its composition varies depending on processing techniques, with freeze-dried powders offering longer shelf life than liquid concentrates.
Physical and Chemical Properties
The extract typically presents as a hygroscopic powder or viscous liquid with a characteristic liver-like odor. Its chemical composition includes water-soluble proteins (30-70%), peptides, free amino acids (e.g., glutamine), and trace elements like zinc and copper. The presence of heme iron gives some preparations a reddish-brown tint. Key stability factors include sensitivity to oxidation and temperature fluctuations. Liquid forms often require preservatives (e.g., 0.1% sodium azide) to prevent microbial growth, while powdered versions are more stable but may cake if exposed to humidity. pH ranges between 6.5-7.5 for most neutralized hydrolysates.
Main Applications
In the pharmaceutical industry, bovine liver extract serves as a raw material for hematinic preparations due to its high bioavailable iron and vitamin B12 content. It's also formulated into injectable liver extracts for metabolic disorders. Nutraceutical manufacturers use it in capsules or syrups for nutritional supplementation. The biotechnology sector employs it as a complex nutrient source in cell culture media, particularly for hybridoma and primary cell lines. Research-grade extracts may undergo additional purification to remove immunogenic components while retaining growth-promoting factors like hepatocyte growth factor (HGF).
Safety and Storage
While generally safe for controlled use, the extract may pose allergy risks for individuals sensitive to bovine proteins. Occupational exposure should follow biosafety level 1 (BSL-1) guidelines, including gloves and eye protection when handling concentrated forms. Long-term storage requires protection from light and moisture. Liquid extracts should be kept refrigerated (2-8°C) and used within 6 months of opening, whereas lyophilized powders remain stable for 2-3 years when sealed under inert gas. Sterile-filtered grades are essential for cell culture applications to prevent contamination.
B2B Procurement Guide
When sourcing bovine liver extract, prioritize suppliers with documented traceability of animal sources (e.g., BSE-free herds) and ISO 13485 certification for pharmaceutical-grade material. Key specifications to request include: protein content (via Lowry or Kjeldahl method), endotoxin levels (<5 EU/mg for injectables), and residual solvent reports for solvent-extracted varieties. Bulk purchasers should negotiate based on testing protocols—HPLC profiles for vitamin consistency and microbiological assays. Consider regional regulations; EU buyers require TSE Compliance Statements, while FDA-regulated purchases need DMF references. Sample testing for heavy metals (lead <5 ppm) is advisable before large orders.
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