Kidney Protein Peptide Lyophilized
Kidney protein peptide, lyophilised, is a freeze dried powder of short peptides produced by enzymatic hydrolysis of animal kidney protein, generally porcine or bovine kidney recovered as an edible offal at slaughter.
Kidney tissue is protein dense and, unlike hide or bone, its protein is largely soluble cytoplasmic and membrane associated material rather than structural collagen. Hydrolysing it gives a peptide mixture with a broad amino acid distribution and none of the glycine and hydroxyproline signature that marks a collagen peptide, along with a naturally high content of nucleotides and bound trace elements. Freeze drying is chosen over spray drying to keep those heat sensitive minor components intact, which is the basis on which the material is sold as an active peptide rather than a plain hydrolysate.
The powder is light yellow to pale brown, porous and low in bulk density, with a savoury and distinctly offal like odour that limits its use in unflavoured formats. It dissolves rapidly and completely in water because lyophilisation leaves an open cake, and it is hygroscopic enough to require nitrogen flushed foil packaging and handling in a humidity controlled room.
We source bulk Kidney Protein Peptide Lyophilized from top China manufacturers for our partners. The manufacturer is in Hainan. A smaller requirement can ship in a combined container with other ingredients.
Please send the grade you need, the volume and your destination port, and we will come back with a solution and a price.
or call +86-21-6858 0751
- Function
- Protein
Specifications
| Item | Specification |
|---|---|
| Appearance | Light yellow to pale brown porous freeze dried powder |
| Odour | Characteristic savoury offal note, free from putrid or ammoniacal odour |
| Protein (N x 6.25, dry basis) | Minimum 75.0% |
| Peptide Content (dry basis) | Minimum 50.0% |
| Molecular Weight below 3000 Da | Minimum 85.0% |
| Loss on Drying | Maximum 5.0% |
| Ash | Maximum 8.0% |
| Fat | Maximum 2.0% |
| pH (1% solution) | 5.5 to 7.5 |
| Lead | Maximum 0.5 mg/kg |
| Cadmium | Maximum 0.5 mg/kg |
| Total Plate Count | Maximum 10,000 cfu/g |
| Yeast and Mould | Maximum 50 cfu/g |
| Escherichia coli and Salmonella | Absent in 25 g |
Common Markets Grades
Species and tissue traceability form the first grade distinction, with porcine kidney the volume feedstock and bovine kidney used where a non porcine source is specified. The second is molecular weight, with general grades holding the greater part of peptide mass below 3000 Daltons and oligopeptide grades ultrafiltered below 1000 Daltons for faster dissolution and a cleaner taste. Protein content on a dry basis usually starts around 70 percent and rises above 80 percent for ultrafiltered material.
Freeze dried presentation is itself a grade against the spray dried version of the same hydrolysate and commands a different price and specification. Beyond that, decolourised and deodorised lots are made for oral formats while unrefined lots retaining full colour and aroma go to culture media, feed and flavour work. Because the feedstock is an animal by-product and kidney is a target tissue in residue monitoring, veterinary drug residue screening and species identification are ordinarily part of the documentation for every grade.
Applications
- Capsule and tablet supplements in the East Asian tonic market, positioned on kidney support and general vitality
- Oral liquid shots and concentrated tonic drinks, where the freeze dried powder dissolves instantly and completely
- Instant powders for reconstitution, blended with plant extracts in traditional style health formulations
- Convalescent and elderly nutrition formats requiring a readily absorbed animal peptide source
- Microbiological culture media, where organ hydrolysates supply nitrogen, peptides and growth factors
- Savoury reaction flavours, used as the amino acid donor in building roast and offal notes
- Pet food palatants, where organ derived peptides raise intake in cats and senior dogs
- Aquaculture and weaning feed attractants for early stage animals
- Cosmetic formulations, used as a small peptide for film forming and moisture binding
China Manufacturers of Kidney Protein Peptide Lyophilized
Top Kidney Protein Peptide Lyophilized manufacturers in China.
Company names and logos are the property of the manufacturers themselves. They are listed here because our own directory records them as producing this ingredient. A listing is not an endorsement by them, and we do not represent them or speak on their behalf.
Regulatory Status
In the United States hydrolysates of edible offal are used as dietary ingredients in supplements under the Dietary Supplement Health and Education Act, with the manufacturer holding the safety basis, and separately as components of microbiological media and animal feed under their own frameworks. There is no food additive regulation and no published generally recognised as safe listing naming kidney peptide, so conventional food use would rest on a self determined generally recognised as safe conclusion for the specific source and process. Bovine material is subject to the ruminant tissue controls imposed against transmissible spongiform encephalopathy, and kidney is one of the tissues most closely monitored in the national residue programme, so imported material is screened accordingly.
In the European Union a peptide preparation from mammalian kidney has no established history of significant consumption in that form and would normally require novel food authorisation before being marketed as a food or food supplement ingredient. Production is also governed by the animal by-products framework, which determines which categories of material may be processed for food and feed and requires approved establishments, and by the transmissible spongiform encephalopathy rules where bovine tissue is involved. No E number applies, since the material is not an additive, and neither Codex nor JECFA has established a specification for it.
Manufacturing Process
Chilled or frozen kidney from an approved abattoir is trimmed of the capsule, fat and ureteric tissue, split and washed repeatedly to purge residual urine and blood, since inadequate washing carries a strong odour through the whole process. The cleaned tissue is minced with water into a pumpable slurry and heated briefly to inactivate the very active native proteases and to reduce the microbial load, then cooled to the working temperature of the enzyme system.
Hydrolysis is run in a stirred reactor at controlled pH, typically with a bacterial endoprotease to cleave the chains followed by an exopeptidase preparation to trim the hydrophobic terminal residues that carry bitterness, and is tracked to a target degree of hydrolysis before the reactor is heated to denature the enzymes. The digest is centrifuged, which removes undigested tissue and separates the fat layer, and the clarified liquor is ultrafiltered at a few kiloDaltons to hold back residual whole protein. Activated carbon treatment for colour and odour is applied where the grade calls for it. The permeate is concentrated at low temperature under vacuum, filled into trays, frozen solid, and dried in a lyophiliser where the ice sublimes under vacuum without the product melting. The dried cake is milled, sieved, and packed at once under nitrogen.
