including
the calyces of roselle (Hibiscus sabdariffa L.)Several authors have confirmed that H. sabdariffa is a good source of
dietary antioxidants, with its calyces containing amounts of anthocyanins
as high as 2.5 g 100 g−1 DW The calyces contain two major
anthocyanins: delphinidin 3-xylosylglucoside (also called delphinidin