Skimmed Milk Powder – Definition, Nutrition and Uses
Skimmed milk powder is a high-protein, low-fat powder produced by removing water from fat-free milk. It is widely used in nutrition, food production, and clinical dietetics.
Things worth knowing about "Skimmed Milk Powder"
Skimmed milk powder is a high-protein, low-fat powder produced by removing water from fat-free milk. It is widely used in nutrition, food production, and clinical dietetics.
What is Skimmed Milk Powder?
Skimmed milk powder (also known as non-fat dry milk) is a dairy product manufactured by evaporating nearly all the water content from fat-free (skimmed) cow's milk. The resulting powder contains less than 1.5 % fat and is rich in proteins, lactose, and essential minerals such as calcium and phosphorus. Due to its long shelf life, ease of storage, and good solubility, it is used worldwide in the food industry, clinical nutrition, and infant formula production.
Production Process
The manufacture of skimmed milk powder involves several key steps:
- Skimming: Raw milk is centrifuged to separate the fat (cream) from the liquid.
- Heat Treatment: The skimmed milk is pasteurized or ultra-heat treated (UHT) to eliminate pathogens.
- Evaporation: Most of the water is removed through vacuum evaporation.
- Spray Drying: The concentrated milk is atomized into a drying chamber, forming a fine powder.
The result is a shelf-stable, easily transportable powder that can be reconstituted with water when needed.
Nutritional Profile
Skimmed milk powder has a distinct nutritional composition that sets it apart from whole milk powder:
- Protein content: approximately 34-36 % (mainly casein and whey proteins)
- Lactose: approximately 50-52 %
- Fat: less than 1.5 %
- Calcium: high content, important for bone and dental health
- Phosphorus, potassium, magnesium: relevant mineral sources
- Vitamins: B2 (riboflavin), B12, small amounts of fat-soluble vitamins
Medical and Nutritional Relevance
Protein Supply
Due to its high protein content, skimmed milk powder is frequently used in clinical nutrition, particularly for patients with elevated protein requirements, such as those recovering from surgery, experiencing malnutrition, or undergoing rehabilitation. The milk proteins it contains are considered complete, high-quality proteins, as they provide all essential amino acids.
Infant Formula
Skimmed milk powder is a key ingredient in many commercially produced infant formulas. It provides essential nutrients but is typically combined with vegetable oils, vitamins, and other nutrients to approximate the composition of human breast milk. Since unmodified skimmed milk powder is not suitable for infants under 12 months, it is always used within specially formulated products.
Lactose Intolerance
Individuals with lactose intolerance should avoid skimmed milk powder or choose lactase-enriched alternatives, as its relatively high lactose content can lead to gastrointestinal symptoms such as bloating, abdominal pain, and diarrhea.
Cow's Milk Protein Allergy
In cases of cow's milk protein allergy, skimmed milk powder is contraindicated. Affected individuals may react to casein or whey proteins, with symptoms ranging from skin reactions to anaphylaxis in severe cases.
Areas of Application
- Food industry: Bakery products, confectionery, dairy items, sauces
- Nutritional medicine: Oral nutritional supplements, protein shakes, supplementary nutrition
- Sports nutrition: Protein supplements and muscle-building preparations
- Infant nutrition: Base ingredient for starter and follow-on formulas
- Humanitarian aid: Food supply in crisis regions
Storage and Shelf Life
When stored correctly — at room temperature, dry, and away from light — skimmed milk powder has a shelf life of up to 24 months. Once opened, it should be sealed airtight and used promptly. Already reconstituted milk must be refrigerated and consumed within 24 hours.
References
- Food and Agriculture Organization of the United Nations (FAO): Codex Standard for Skimmed Milk Powder (CODEX STAN 207-1999). FAO, Rome.
- World Health Organization (WHO): Infant and Young Child Feeding. Model Chapter for Textbooks. WHO Press, Geneva 2009.
- Mahan LK, Raymond JL: Krause's Food and the Nutrition Care Process. 14th Edition. Elsevier, St. Louis 2017.
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