Particulate systems from maqui (Aristotelia chilensis) wastes to be used as nutraceutics or high value-added ingredients

Abstract

Powdered ingredients from maqui wastes were produced and the effect of drying method (air- and freeze-drying) and particle size on physicochemical and bioactive properties was investigated. Among the particulate systems of smaller particle size that showed the most balanced insoluble to soluble fiber ratio and the best hydration and oil absorption properties, the freeze-dried ones presented the best retention of polyphenols, anthocyanins, and antioxidant capacity. These powders could be used as ingredients in premixes for the development of foods for diabetes or gluten-free diets. The powders of higher granulometry presented excellent flowability and more dispersed particle size distribution, being more adequate for the development of composite foods or nutraceutics.