Whey Protein Isolate (WPI)
| Nazwa produktu | Whey Protein Isolate (WPI) |
|---|---|
| Numer CAS | Not applicable (protein complex) |
| Wygląd | Off-white to light cream fine powder |
| Specyfikacja | ≥90% protein (dry basis) |
| Inne nazwy | WPI, Isolated Whey Protein, Whey Isolate |
| Rozpuszczalność | Dispersible in water, forming a colloidal solution |
| Opakowanie | 20 kg / 25 kg multi-wall bags with PE liner |
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Synonimy: Whey Protein Isolate, WPI, Isolated Whey Protein, Whey Isolate, Milk Whey Protein Isolate
Whey protein isolate has moved from a niche sports nutrition ingredient to a staple in mainstream functional foods and clinical nutrition. Its high protein density, low lactose, and neutral taste make it a preferred choice for formulators targeting clean-label, high-protein products.
WPI is produced by processing whey, the liquid co-product of cheese making, through a series of filtration steps—typically microfiltration and ultrafiltration—that remove most of the fat, lactose, and minerals. The result is a protein fraction that is over 90% protein on a dry basis, with a balanced amino acid profile rich in branched-chain amino acids (BCAAs).
Commercial WPI comes in two main grades: instantized for cold-water dispersion and regular for general use. Both are standardized to protein content, with specifications for moisture, ash, and microbiological quality to suit applications from ready-to-drink beverages to protein bars and medical nutrition.
Whey protein isolate consists primarily of β-lactoglobulin and α-lactalbumin, along with smaller amounts of immunoglobulins, bovine serum albumin, and lactoferrin. The filtration process concentrates these proteins while reducing lactose to typically less than 1% and fat to below 0.5%.
This composition gives WPI a high biological value and a clean sensory profile, making it easy to incorporate into neutral or lightly flavored systems. It also dissolves well, especially instantized grades, which minimizes foaming and improves mouthfeel in beverages.
| Parametr | Specyfikacja |
|---|---|
| Protein (dry basis) | ≥90.0% |
| Moisture | ≤6.0% |
| Fat | ≤1,01 TP3T |
| Lactose | ≤1,01 TP3T |
| Ash | ≤3.0% |
| Metale ciężkie | ≤10 ppm |
| Wartości graniczne dla mikroorganizmów | Total plate count ≤10,000 cfu/g; E. coli absent; Salmonella absent |
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