Galactooligosaccharide and Sialyllactose Content in Commercial Lactose Powders from Goat and Cow Milk
- Hyo Hee Kim Sung Seob Yun Chang Hwan Oh Sung Sik Yoon
- Food Science of Animal Resources
- Korean Journal for Food Science of Animal Resources 제35권 제4호
- 등재여부 : KCI등재
- 572 - 576 (5 pages)
The most commonly used infant formulas contain lactose originating from cow milk. Goat milk has recently been claimed to be nutritionally more effective for infants than other milks. In baby foods, much emphasis is placed on the concentrations of intestinal microflora-promoting oligosaccharides, which are generally transferred into lactose from milk during crystallization process. Here we show that higher level of free sialic acid is present in goat lactose powder compared to cow lactose powder. Without proteinase K treatment, the amount of 3-sialyllactose and 6-sialyllactose were similar in goat and cow lactose powders. However, after proteolysis, 6-sialyllactose was present at higher levels in goat than in cow lactose powder. Galactooligosaccharides, a group of prebiotics, are present in milk in the form of glycoproteins. Galactooligosaccharide content was also higher in goat lactose powder than in cow lactose powder.