Development and Characterization of Powdered Antioxidant Compounds Made from Shiraz ( L.) Grape Peels and Arrowroot ( L.).

Grapevine ( L.) is a plant containing many phenolic compounds, mostly distributed in the peel, pulp, and seeds. This study evaluates the centesimal composition and bioactive compounds in Shiraz grape () peels using spectrophotometric and UHPLC techniques and develops different formulations of compound powders from the peels and arrowroot using conventional drying technology.