Abstract
Polyphenolic extracts from pine bark have reported different biological actions and promising beneficial effects on human health. However, its susceptibility to environmental stresses (temperature, storage, etc.) and physiological human conditions prequires the development of efficient protection mechanisms to allow effective delivering of functionality. The aim of this work was to encapsulate pine bark extract rich phenolic compounds by spray-drying using maltodextrin, and understand the influence of encapsulation on the antioxidant and antimicrobial activity and bioaccessibility of phenolic compounds during gastrointestinal digestion. The optimized process conditions allowed good encapsulation efficiency of antioxidant phenolic compounds. The microencapsulation was effective in protecting those compounds during gastrointestinal conditions, controlling their delivery and enhancing its health benefits, decreasing the production of reactive oxygen species implicated in the process of oxidative stress associated with some pathologies. Finally, this encapsulation system was able to protect these extracts against acidic matrices, making the system suitable for the nutritional enrichment of fermented foods or fruit-based beverages, providing them antimicrobial protection, because the encapsulated extract was effective against Listeria innocua. Overall, the designed system allowed protecting and appropriately delivering the active compounds, and may find potential application as a natural preservative and/or antioxidant in food formulations or as bioactive ingredient with controlled delivery in pharmaceuticals or nutraceuticals.
Highlights
Introduction published maps and institutional affilIn recent years, an ever-increasing demand for supplements based on natural products has been recorded in Europe
This study demonstrates that the phenolic compounds present in the extract have highas when subjected to gastric conditions, which may be due to the presence of enzymes and the acidic pH of this phase
The results showed that cell viability decreased significantly promising results by Ferric reducing antioxidant power (FRAP) and DPPH antioxidant assays (Figure 3), Caco-2 cells were when the cells were treated with both digested pine bark extracts (PBE) (LPBE-Dig or lyophilized pine bark extracts (LPBE)-MD-Dig)
Summary
Introduction published maps and institutional affilIn recent years, an ever-increasing demand for supplements based on natural products has been recorded in Europe. Thanks to the scientific evidences, many consumers believe that the consumption of plant-based supplements rich in particular phytochemicals can be useful for the prevention of some pathologies. This idea followed in the functionalization of foods and drinks with plant-based extracts and strongly effected the supplement market, which recorded an exponential growth in the production and sale of dietary supplements, especially those plant-based [1,2]. It has been reported that pine bark extracts (PBE) have beneficial biological effects, including anti-inflammatory, antiviral, antitumor, antibacterial, antioxidant and can be used as nutraceutical preparation iations
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