Cistanche Deserticola Polysaccharide Identity
The source is the fleshy stem of Cistanche deserticola Y.C.Ma, a holoparasite that has no chlorophyll and lives on the roots of desert shrubs such as saxaul. The scaly, succulent stem is the only plant part used. Flowers, seeds and the host plant are not part of the material, and Cistanche tubulosa, a related species often traded under the same commodity name, is a separate raw material.
Stem tissue is rich in water-soluble matter. Hot-water extraction brings out phenylethanoid glycosides, oligosaccharides and polysaccharides together, and ethanol precipitation then keeps the large polymers while the small glycosides and free sugars remain in the supernatant. Cistanche deserticola polysaccharide is described as a heteropolysaccharide fraction with a glucose-rich backbone and smaller shares of other sugars.
Some protein and uronic acid carry through the precipitation, and the exact monosaccharide profile of Cistanche deserticola polysaccharide depends on the extraction conditions, the age of the stem and the drying of the raw material. No molecular weight is stated for this grade.
Related Cistanche deserticola materials serve different questions. Cistanche Extract Powder keeps the whole water-extract profile, Cistanche Powder is the milled stem, and Cistanche Extract 1–50% Echinacoside is the glycoside-standardized grade, which is a different analyte from a polysaccharide figure.












