My diet:

Potato starch

No E-numberThickeners & gumsOrigin: Plant
Get a personal answer

Pick your family’s diets in the bar above.

Every diet

VeganYes
Gluten-freeYes

Potato is not a gluten grain.

HalalYes
KosherYes

Some Passover customs treat potato starch as kitniyot and some do not. Ask your certifier.

KetoNo

Potato starch is a concentrated carbohydrate.

Low-FODMAPYes

The starch itself is not the FODMAP. A whole potato can be a different serving.

The short answer
Potato starch is the washed starch of the potato, not dried potato flour. It is vegan and gluten-free, and it is not keto.
Use in moderation

Safe in small amounts; may bother some people or raise blood sugar.

E-numberNone
Comes fromPlant
What it doesThickeners & gums
Glycemic index—
Daily limitNot set
Also calledPotato starch

Rules by country

🇺🇸 US FDANot evaluated as an additive
🇪🇺 European UnionNot evaluated as an additive
🇨🇦 Health CanadaNot evaluated as an additive
CaliforniaNo extra rules

Potato starch is a food, not an E-number. It is gluten-free because potato is not a gluten grain. It is a carbohydrate, so it is not a keto ingredient. Nightshade worries are about the vegetable, not a regulatory ban on the starch.

Daily limit: Experts haven’t set a number because normal food amounts are far below any level of concern.

What is it?

Potato starch thickens into a clear gel at a gentle heat and can break if you boil it. Gluten-free bakers like the tender crumb it gives.

Where it comes from: Potato starch is the starch washed out of potatoes. Potato flour is the whole tuber, dried and ground, skin and all. The two powders thicken differently, and only the starch is what this page covers.

Why it’s in food

  • Thickens soups without clouding them
  • Tenderizes gluten-free cakes
  • Crisps a coating
  • Holds moisture in a dough

Often found in

Gluten-free cakesClear soupsPotato pancakes that need extra starchAsian noodlesCoatings for fryingSome shredded cheeses

Also listed as: Potato starch

Health & gut impact

A fast starch once cookedConcern

Cooked potato starch digests readily to glucose. Resistant potato starch, sold as a supplement and eaten cold, is a different product.

Digestion of gelatinized potato starch

Not potato flourBenefit

Potato flour includes the dried flesh of the tuber. Potato starch is only the washed granules, so the flavor is almost gone.

Milling distinction used on US packages

What can I use instead?

Tapioca starch

Ratio: Use a similar spoon

Best for: Gluten-free cakes

Corn starch

Ratio: Expect a cloudier sauce

Best for: Gravy

Related

More thickeners & gums:

Acetylated distarch adipate E1422Acetylated distarch adipate (E1422) is a modified starch used in frozen foods and sauces. It is allowed. The US name on the label is usually just modified food starch, and it still counts as carbohydrate.Generally safeAgar-Agar E406Agar-agar (E406) is a seaweed gel that sets firmer than gelatin. It's safe, vegan, gluten-free, keto and kosher, and is the easiest plant swap for gelatin.Generally safeArrowroot (Arrowroot starch)Arrowroot is a tasteless starch from a tropical rhizome. It is vegan and gluten-free, it makes a clear gel, and it is not keto.Use in moderationBeta-glucan (β-glucan)Beta-glucan is the soluble fiber in oats and barley that the FDA's heart-disease claim is about, at 3 grams a day. Barley versions contain gluten. Yeast versions are a different fiber and do not carry that claim.Generally safe

Common questions

Is potato starch the same as potato flour?

No. Flour is the dried tuber. Starch is only the washed starch.

Is potato starch gluten-free?

Yes.

Is Potato starch safe?

Use in moderation (78/100). Potato starch is a food, not an E-number. It is gluten-free because potato is not a gluten grain. It is a carbohydrate, so it is not a keto ingredient. Nightshade worries are about the vegetable, not a regulatory ban on the starch.

Is Potato starch gluten-free?

Yes. Potato is not a gluten grain.

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Scientific sources & regulatory citations
  • Digestion of gelatinized potato starch
  • Milling distinction used on US packages