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Published on: August 24, 2011
Salt Equilibria and Protein Glycation in Young Child Formula
Wenfu Chen1, Wenzhu Yin1, Xiumei Tao1
1School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
Young child formula (YCF) products show significant variation in salt distribution and protein glycation. Manufacturers should optimize processing to improve nutritional quality and digestibility for children aged 1-3 years.
Area of Science:
- Food Science
- Nutritional Biochemistry
- Dairy Science
Background:
- Young child formula (YCF) is a key nutrient source for toddlers (1-3 years).
- Salt equilibria and protein glycation critically impact YCF nutritional and digestive properties.
- Limited data exists on these aspects in commercial YCF products.
Purpose of the Study:
- To analyze salt distribution (calcium, phosphorus) and protein glycation levels in commercial YCF products.
- To identify variations in casein mineralization and heat-induced modifications.
- To provide insights for optimizing YCF formulation and processing.
Main Methods:
- 25 commercial YCF products were reconstituted and fractionated.
- Calcium and phosphorus distribution (sedimentable, protein-associated, soluble) was determined.
- Protein glycation markers (blocked lysine, 5-HMF) were quantified using HPLC.
Main Results:
- Significant variability found in calcium (3.0-39.3%) and phosphorus (1.2-29.8%) sedimentability.
- Substantial proportions of calcium (28.9-62.7%) and phosphorus (27.4-57.9%) were protein-associated.
- Blocked lysine (7.4-19.2%) and 5-HMF (3.0-7.0 mg/100 g protein) indicated processing-related differences.
Conclusions:
- Commercial YCF products exhibit considerable variation in salt distribution and protein glycation.
- Casein mineralization levels differ significantly across products.
- Optimizing milk source (low casein mineralization) and processing (e.g., using liquid concentrate) can enhance YCF nutritional quality.
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