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Potato protein

Potato protein suppliers and sourcing guide

Potato protein is recovered from potato fruit juice, the liquid left after potatoes are ground to extract starch. In older processes the juice is heated and acidified so the protein coagulates, giving an insoluble powder used in feed and some foods. Newer processes use adsorption or membrane filtration at mild temperatures to make native, soluble potato protein isolates of about 90% protein. Native isolates are used for their foaming, gelling and emulsifying behavior in egg replacers, meat analogs and drinks.

Also known as
potato protein isolate · potato tuber protein · Solanum tuberosum protein · coagulated potato protein
Facts checked
November 2026

Forms and grades of potato protein

Suppliers sell different products under the same name. Specify the one you need.

  • Native (soluble) isolate

    Protein recovered without heat coagulation, at about 90% protein, with foaming and gelling properties.

  • Coagulated potato protein

    Heat-coagulated, largely insoluble protein used as a protein source rather than for function.

  • Hydrolyzed potato protein

    Enzyme-treated protein with smaller peptides and higher solubility.

  • Low and high molecular weight fractions

    Some suppliers sell separated fractions (patatin-rich or protease-inhibitor-rich) for different functions.

What to check on the COA

Compare each result with your own specification when the lot arrives.

Protein (Kjeldahl or Dumas)
Total nitrogen times 6.25, as-is and on a dry basis.
Glycoalkaloids
Total glycoalkaloids (solanine and chaconine) by HPLC or LC-MS; this is the potato-specific limit buyers should see on every COA.
Moisture, ash and pH
Basic composition and pH, which affect solubility.
Functional tests
Solubility, foam overrun or gel strength for native grades.
Microbiology
Total plate count, coliforms, yeast and mold, Salmonella and E. coli.

Storage, lots and expiry

Storage and shelf life

Store sealed, cool and dry. Native isolates should be kept away from heat, which can reduce solubility and function. Shelf life is set by the supplier's specification, with retest of function and micro for older lots.

Lots and expiry dates

Record protein, glycoalkaloids and functional results for each lot, since foam and gel behavior can vary between production runs. Rotate first-expired, first-out.

Regulatory status

Facts from regulators and standards bodies, each linked to its source.

This is general information, not regulatory advice. Status differs by country and by how the ingredient is used, so check the rules for your product and market.

Potato protein suppliers

Manufacturers and distributors whose own websites say they sell it.

  • Avebe

    Manufacturer · Veendam, Netherlands

    Dutch cooperative that processes potatoes into starch, starch derivatives and potato protein for food, animal nutrition and industrial uses.

Suppliers are in alphabetical order and none pays to appear. Each claim is checked against the supplier’s own website on the date shown. Ask for the specification sheet and a recent COA before you order, and confirm details with the supplier.

Frequently asked questions

What forms of potato protein can brands buy?

Common forms include native (soluble) isolate, coagulated potato protein, hydrolyzed potato protein and low and high molecular weight fractions. Ask each supplier for the specification sheet of the exact grade they quote.

What should the COA for potato protein include?

Expect protein (Kjeldahl or Dumas), glycoalkaloids, moisture, ash and pH, functional tests and microbiology, each with its method, specification and result for that lot.

How should potato protein be stored?

Store sealed, cool and dry. Native isolates should be kept away from heat, which can reduce solubility and function. Shelf life is set by the supplier's specification, with retest of function and micro for older lots.

What is the regulatory status of potato protein?

GRN 447, for potato protein isolates notified by Solanic B.V., closed on May 24, 2013 with FDA having no questions. GRN 86, for coagulated potato protein, hydrolyzed potato protein or clarified hydrolyzed potato protein notified by AVEBE b.a., closed on Apr 3, 2002 with FDA having no questions. Health Canada's Workout Supplements monograph lists potato protein (potato tuber protein) with the tuber of Solanum tuberosum as the source material.

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