Ziziphus jujuba Polysaccharide Identity
Ziziphus jujuba polysaccharide powder is made from the fruit of Ziziphus jujuba Mill., the Chinese jujube or red date. Ziziphus jujuba fruit flesh is the only part used. The seed, sold as suanzaoren and taken from the variety Ziziphus jujuba var. spinosa, is a separate material, and the Indian jujube, Ziziphus mauritiana, is a different species with different fruit.
Ziziphus jujuba fruit is a drupe with a thin skin, a sugary flesh and a hard, pointed stone. When dried, the flesh turns dark red and wrinkles into the familiar red date. Free sugars make up a large share of the dry weight of the fruit, so a crude water extract is mostly sugar, and the polysaccharides are a smaller, more valuable fraction that has to be separated from it.
The polysaccharides of Ziziphus jujuba flesh are described as pectic heteropolysaccharides, with galacturonic acid in the backbone and arabinose, galactose and rhamnose in the side chains, plus smaller neutral glucan and arabinogalactan fractions. Hot-water extraction pulls them out, and ethanol precipitation keeps the large polymers and leaves most of the small sugars in the supernatant.
Related jujube products differ in nature. Jujube Powder is the dehydrated fruit, Freeze-Dried Jujube Powder is a freeze-dried fruit powder, and Jujube Fruit Extract Powder is a ratio extract. None of these is specified by a carbohydrate assay.












