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Concentrated Milk Proteins

Concentrated Milk Proteins Standard

v 2.1 | Effective 10/05/2023

Product Definition

Concentrated Milk Protein products are obtained by concentrating bovine skim milk through filtration processes so that the finished dry product contains at least 40% protein by weight.  Concentrated Milk Protein products may be produced by filtration, dialysis, or any other safe and suitable processes by which all or part of the lactose and minerals may be removed.  Products cannot be produced by combining separately produced ingredients, i.e. casein (or caseinates) and whey proteins.

Milk Protein Concentrate (MPC) and Milk Protein Isolate (MPI) are produced by filtration methods (ultrafiltration and diafiltration) which capture essentially all the casein and whey proteins contained in the raw material stream, resulting in products with a casein-to-whey protein ratio equivalent to that of the original milk, generally a value of 80:20.

Concentrated Milk Protein products may also be produced using microfiltration, which will alter the casein-to-whey protein ratio compared to that found in milk.  Such products manufactured using microfiltration have casein-to-whey protein ratios that range between 82:18 and 95:5 for commercially available products.  These products are called Microfiltered Milk Protein Concentrates (MMPC) and Microfiltered Milk Protein Isolates (MMPI) or Micellar Casein Concentrates (MCC) and Micellar Casein Isolates (MCI).

Concentrated Milk Proteins comply with all provisions of the U.S. Federal Food, Drug, and Cosmetic Act.

Standard: Printable PDF

Composition: Milk Protein Concentrates (MPCs) and Milk Protein Isolate (MPI)

Several different MPC and MPI products are commercially available, each of which is identified by a number which represents the protein content of the product.  These include:
MPC 40 MPC 42 MPC 56 MPC 70 MPC 80 MPC 85 MPI
Parameter Units of Measure Limits (protein limits are minima; all other limits are maxima)
Protein (1) % 39.5 41.5 55.5 69.5 79.5 85.0 89.5
Lactose % 52.0 51.0 36.0 20.0 9.0 8.0 5.0
Fat % 1.25 1.25 1.50 2.50 2.50 2.50 2.50
Total moisture % 5.0 5.0 5.0 6.0 6.0 6.0 6.0
Ash % 10.0 10.0 10.0 10.0 6.0 6.0 6.0

(1) For MPC 85 and MPI the protein limits are on a dry basis instead of the as-is basis.  All other units in the table are on the as-is basis.

Composition: Microfiltered Milk Protein Concentrates (MMPCs) and Isolates (MMPIs); and Micellar Casein Concentrates (MCCs) and Isolates (MCIs)

Several different MMPC, MMPI, MCC and MCI products are commercially available, each of which is identified by a number which represents the protein content of the product.  These include:

42 70 80 85 MMPI or MCI
Parameter Units of Measure Limits (protein limits are minima; all other limits are maxima)
Protein (2) % 41.5 69.5 79.5 85.0 89.5
Lactose % 51.0 16.0 10.0 3.0 1.0
Fat % 1.25 2.50 3.00 3.00 3.00
Total moisture % 5.0 6.0 6.0 6.0 7.0
Ash % 6.0 8.0 8.0 8.0 8.0

(2) For the 85 and isolate products, the protein limits are on a dry basis instead of the as-is basis.  All other units in the table are on the as-is basis.

Other Characteristics

No additional physico-chemical requirements are defined for Concentrated Milk Proteins.  Microbiological requirements are as follows:

Microbiological Analysis
Parameter Units of Measure Limits
Standard plate count CFU/g 30,000 maximum
Yeast and mold CFU/g 100 maximum
Coliforms (3) CFU/g 10 maximum
Enterobacteriaceae (3) CFU/g 10 maximum
Salmonella genus CFU/sample (4) not detected
Listeria genus CFU/g not detected

(3) The food industry is trending toward Enterobacteriaceae (“EB”) as the most commonly used category of indicator organisms for gauging general process sanitation.  For compliance with this Standard, either coliforms and/or EB shall be utilized, at the discretion of the manufacturer.

(4) Typical minimum sample size for Salmonella testing is 25 g, but the exact sample size and methodology is left to the discretion of the manufacturer.

Methods of Analysis
Parameter Reference Method
Protein SMEDP 15.132 (N x 6.38)
Lactose SMEDP 15.092
Fat AOAC 989.05
Moisture AOAC 927.05
Ash AOAC 900.02
Coliforms AOAC 989.10
Microbiological tests FDA BAM
Product Labeling

Recommended identifications:

Milk Protein Concentrate: where the % protein is declared

Milk Protein Isolate: where the protein content conforms to the limit defined herein

Microfiltered Milk Protein Concentrate: where the % protein is declared

Microfiltered Milk Protein Isolate: where the protein content conforms to the limit defined herein

Micellar Casein Concentrate: where the % protein is declared

Micellar Casein Isolate: where the protein content conforms to the limit defined herein

Concentrated Milk Proteins can be used as food ingredients in a variety of food categories.  Depending on the food category of use, they can serve as emulsifiers, flavor enhancers, flavoring agents, formulation aids, humectants, stabilizers, thickeners, and texturizers; and as sources of high-quality protein.

Product should be stored, shipped, and utilized according to the manufacturer’s established recommendations.  As guidance, product should be stored and shipped in a cool, dry environment with temperature below 80°F and relative humidity below 65%.  Stocks should be rotated and utilized in accordance with the manufacturer’s established date of expiration or retest.

Multiwall kraft bags with polyolefin inner liner, or other suitable closed containers (e.g., totes) are typical.

Additional Resources

Additional resources including the Dried Dairy Ingredients Handbook and more are available for ADPI members. Click the button to log-in to access these resources.

In no event shall ADPI be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to: the need to procure substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the publication, use of, or reliance upon any standard, even if advised of the possibility of such damage and regardless of whether such damage was foreseeable.

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