Onion powder

No E-numberFlavor enhancersOrigin: Plant

Get a personal answer

Pick your family’s diets in the bar above.

Every diet

VeganYes

Onion powder is dried onion.

Gluten-freeYes

HalalYes

KosherYes

KetoYes

A pinch of onion powder has negligible carbohydrate.

Low-FODMAPNo

Onion powder is high in fructans.

The short answer

Onion powder is dried onion. It is vegan, gluten-free and fine for keto in a pinch. It is not low-FODMAP. It is the ingredient behind a lot of savory snack dust.

90/100

Generally safe

Fine for most people at normal amounts.

E-numberNone

Comes fromPlant

What it doesFlavor enhancers

Glycemic index—

Daily limitNot set

Also calledOnion powder, Onion

Rules by country

🇺🇸 US FDANot evaluated as an additive

🇪🇺 European UnionNot evaluated as an additive

🇨🇦 Health CanadaNot evaluated as an additive

CaliforniaNo extra rules

Onion powder is a food, not an E-number. The fructans that make onion high FODMAP are still in the powder. A soup mix that lists onion powder is not a low-FODMAP soup.

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

What is it?

The bulbs are peeled, dehydrated and milled. Because the powder is hygroscopic, it cakes in a humid kitchen. Some packers add an anti-caking agent and list it. The onion is the ingredient that matters for the diet flags.

Where it comes from: Onion powder is onions, dried and ground. White, yellow and red onions all become a tan powder that tastes sweeter and less sharp than the raw bulb. Onion salt is the powder mixed with salt.

Why it’s in food

Sweetens a dry rub
Flavors a chip
Starts a soup mix
Stands in for a chopped onion

Often found in

Snack seasoningsBurger mixesOnion dipMeatloafBroth powdersCrackers

Also listed as: Onion powder, Onion, Dried onion, Granulated onion, Onion salt

Health & gut impact

FructansConcern

Onion fructans stay in the dry powder. A low-FODMAP cook uses the green tops of scallions, which are a different cut of a different allium strategy, not this powder.

Monash FODMAP classification of onion

A small pinch is still onionUnder study

Recipes sometimes treat a teaspoon of powder as too little to count. For a FODMAP elimination, onion powder counts.

FODMAP elimination practice for alliums

What can I use instead?

Garlic powder

Ratio: The other dried allium, also high FODMAP

Best for: Rubs

Salt

Ratio: The partner in onion salt, without the onion

Best for: Seasoning

More flavor enhancers:

Artificial flavors (Artificial flavoring)Artificial flavor means the aroma was synthesized, not extracted from the food it tastes like. The category is allowed. Vegan, halal and kosher status still depends on the carrier.Use in moderation Brewer's yeastBrewer's yeast is yeast left over from making beer. It is bitter, it may contain barley gluten, and it is not the cheesy flake called nutritional yeast.Use in moderation Calcium inosinate E633Calcium inosinate (E633) is a savory flavor booster related to disodium inosinate, used alongside MSG in snacks and stock products. It is gluten-free, but vegan, halal and kosher status depends on whether it was made by fermentation or from animal tissue.Generally safe Diacetyl (Butanedione)Diacetyl is the buttery flavor molecule. The FDA lists it as a GRAS flavor. Breathing the vapor at work has harmed lungs. Eating the trace in a food is the exposure the GRAS rule is about.Use in moderation

Common questions

Is onion powder low FODMAP?

No. It is dried onion, and onion is high in fructans.

Is onion powder gluten-free?

Plain onion powder is. A seasoned onion salt can add wheat carriers. Read the jar.

Is Onion powder safe?

Generally safe (90/100). Onion powder is a food, not an E-number. The fructans that make onion high FODMAP are still in the powder. A soup mix that lists onion powder is not a low-FODMAP soup.

Is Onion powder vegan?

Yes. Onion powder is dried onion.

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Scientific sources & regulatory citations

Monash FODMAP classification of onion
FODMAP elimination practice for alliums