Mannoproteins from yeast cell walls

INS 455

Used as a stabilizer.

Yeast mannoproteins are wine stabilisers. They stop tartrate crystals forming in the bottle — the harmless glassy shards that drinkers mistake for broken glass — and soften the mouthfeel.

Where it is and isn’t permitted

Status of Mannoproteins from yeast cell walls by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationNot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.
Codex AlimentariusCodex Alimentarius Commission / JECFAPermitted, with conditions

1 food category

highest permitted level 400 mg/kg

CXS 192-1995 Table One, INS 455, food category 14.2.3retrieved 2026-09-07

What it is made from

Extracted from the cell walls of Saccharomyces cerevisiae, the same yeast that fermented the wine.

  • Vegan
  • Vegetarian

Every name it appears under

2 recorded names. A label may use any of them.

INS number

  • 455

Other names

  • MANNOPROTEINS FROM YEAST CELL WALLS

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • gsfa retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/mannoproteins-from-yeast-cell-walls.json