Abstract
ABSTRACTThe objective of the present study was to investigate the physicochemical characteristics and storage stability of water-in-oil-in-water (W/O/W) emulsions and spray-dried red ginseng extract capsules (RGEC) prepared using different secondary coating materials such as maltodextrin (MD), whey protein concentrate (WPC), or arabic gum (AG). The particle sizes of W/O/W emulsions and spray-dried RGEC coated with MD were considerably lower than those of W/O/W emulsions and spray-dried RGEC coated with WPC or AG. The zeta-potential value (−36 mV) of spray-dried RGEC coated with MD was significantly higher than that of spray-dried RGEC coated with WPC or AG (p < 0.05), indicating that spray-dried RGEC coated with MD were much more stable than spray-dried RGEC coated with WPC and AG. In the storage stability study, it was found that the refrigerator temperature (4°C) was preferred for storing spray-dried samples for a long time. Based on these results, it was confirmed that MD could be the most efficient coating material for W/O/W emulsions and nano-sized spray-dried RGEC.
Highlights
Ginseng is one of the most commonly used herbal foods and medicines, owing to its unique health benefits and functional properties in the world, especially in Asian countries today.[1]
The present results were in agreement with those presented by Saloko et al.,[26] who indicated that the nanocapsules coated with MD showed a smaller size (14 nm) than the nanocapsules coated with a mixture of chitosan and MD
This study confirmed that W/O/W nanocapsules of red ginseng extract capsules (RGEC) coated with MD can be efficiently prepared using the spray-drying technique
Summary
Ginseng is one of the most commonly used herbal foods and medicines, owing to its unique health benefits and functional properties in the world, especially in Asian countries today.[1]. Among the commercial red ginseng products, the red ginseng extract has highly concentrated forms of ginsenosides, with potentially greater health benefits including antidiabetic and antiviral properties.[5,6,7] the presence of a number of active ingredients in red ginseng extracts is noteworthy,[8,9] the level of bioavailability of these substances needs to be further improved so that they can be utilized for providing health benefits
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