Polysaccharides

Polysaccharides are long chains of sugar units. In fungal extracts they are a key quality parameter, and the test method matters as much as the figure printed on the COA.

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Polysaccharides: the chemistry in brief

Polysaccharides are carbohydrates built from many monosaccharide units joined by glycosidic bonds. Starch, cellulose and beta-glucans are familiar examples. They differ in their sugar units, bond types, branching and molecular weight.

In fungi, much of the polysaccharide content sits in the cell wall. Beta-glucans are the best-known group. Fungal extracts can also contain other glucans, mixed-sugar polysaccharides and protein-bound forms.

Polysaccharides in the FC range

The FC product page for Harporia® highlights polysaccharides as key compounds. Harporia® is a Poria cocos extract powder that FC Materials supplies from a global partner. More detail is on the Harporia® branded page.

How polysaccharide content is measured

A polysaccharide figure means little without its method. Common methods can give quite different results on the same sample.

  • Phenol–sulphuric acid method: a colour test for total carbohydrate, reported as glucose equivalents. It can also count free sugars, starch and maltodextrin carriers.
  • Ethanol precipitation first: removes small sugars before testing, so the result better reflects large molecules.
  • Enzymatic beta-glucan assays: measure beta-glucans specifically and separate them from alpha-glucans such as starch.
  • Size-exclusion chromatography: profiles the molecular weight distribution rather than the total amount.

Specifying polysaccharides

Write the method into the specification, not just a minimum value. If the extract contains a carrier, ask whether it was excluded or counted. Compare suppliers only when they test the same way.

Polysaccharide-rich powders can be hygroscopic. Check moisture limits and packaging, and test dispersion in your liquid or powder base.

What to ask your supplier

  • The exact test method and reference standard behind the polysaccharide result.
  • Whether free sugars and carriers are excluded from the figure.
  • Beta-glucan and total polysaccharide results, if both matter to you.
  • Several batch results, so you can judge consistency.
  • Moisture, heavy metals, pesticides and microbiology.

Polysaccharide content is a quality marker, not a claim, and finished-product wording must meet each market's rules. Want a second view on a COA? WhatsApp us.