A comparative study on the phenolic bioaccessibility, antioxidant and inhibitory effects on carbohydrate-digesting enzymes of maca and mashua powders
2020
Paucar-Menacho, Luz María | Peñas, Elena | Hernández-Ledesma, Blanca | Frías, Juana | Martínez-Villaluenga, Cristina | Ministerio de Ciencia, Innovación y Universidades (España) | Agencia Estatal de Investigación (España) | Ministerio de Economía y Competitividad (España) | Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica (Perú) | Fondo Nacional de Desarrollo Científico, Tecnológico y de Información Tecnológica (Perú) | European Commission
The polyphenolic content of dehydrated maca (MA) and mashua (M) powders, promising functional ingredients, and their antioxidant activity and inhibition of carbohydrate digestion was evaluated following in vitro gastrointestinal digestion (GID). Moreover, the impact of steaming on bioaccessibility and bioactivity of the M phenolic fraction was investigated. MA phenolic fraction composed mainly of caffeic-4-O-glucosides showed high bioaccessibility (117.8%), antioxidant activity (142.9 μmol Trolox equivalents, TE/g) and weak effectiveness to inhibit carbohydrate digestion after GID. Anthocyanins were the major compounds in the M phenolic fraction with low bioaccessibility (22.4%), although a superior antioxidant activity (446.7 μmol TE/g) and modest inhibitory effects on carbohydrate digestion after GID. Generally, bioaccessibility and bioactivity of M decreased after steaming process. MA and M powders contain appreciable concentrations of phenolics, although M polyphenols were more effective on modulating carbohydrate digestion.
Show more [+] Less [-]This study was funded by grants AGL2017-83718-R (AEI/FEDER, UE) and AGL2015-66886-R (MINECO, FEDER/UE). We express our gratitude to B. Castro for technical assistance. L. Paucar-Menacho acknowledges to Consejo Nacional de Ciencia y Tecnologia (CONCYTEC, Peru) for financial support (Grant number 193-2018-FONDECYT).
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