Paper
Vitamins, fatty acids, and antioxidant capacity stability during storage of freeze-dried human milk
Published Aug 20, 2014 · Blanca Lozano, A. Castellote, R. Montes
International Journal of Food Sciences and Nutrition
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Abstract
Abstract Although freezing is the most common method used to preserve human milk, nutritional and immunological components may be lost during storage. Freeze-drying could increase the shelf life of human milk, while preserving its original characteristics. Seventy-two samples of freeze-dried human milk were stored for different periods of time, up to a maximum of 3 months, at 4 °C or 40 °C. Vitamin C, tocopherols, antioxidant capacity, and fatty acids composition were analyzed. A new HILIC–UHPLC method improving vitamin C determination was also validated. Ascorbic acid and total vitamin C concentrations significantly decreased at both temperatures, while antioxidant capacity only decreased at 40 °C. Fatty acids composition and both γ-tocopherol and δ-tocopherol contents remained unaltered. The stability after storage of freeze-dried milk was higher than that reported for frozen or fresh milk indicating that freeze-drying is a promising option to improve the preservation of human milk in banks.
Freeze-drying human milk preserves nutritional and immunological components while increasing its shelf life, with higher stability than frozen or fresh milk.
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