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Red Onion

Also listed as: Red onion, raw

Red Onion is low risk in a normal serving and a good everyday choice for most people with gout. A typical 85 g serving has about 2 mg of purines, about 1% of a ~400 mg working daily target.

General information, not a substitute for advice from your doctor or dietitian.

How much can I eat?

Units

A typical serving is about 85 g, which delivers 2 mg of purines, or about 1% of a ~400 mg working daily target.

This serving
¾ cup
85 g
Purine / serving
2 mg
% daily purine
1%
Purines in this serving2 mg · 1% of a day
0 mg~400 mg daily limit
¼ cup2 ¾ cups

Even a large serving stays well within a ~400 mg working daily purine target.

These are plant purines, which research links far more weakly to flares: the 2 mg here counts as roughly 1 mg toward your gout risk.

Red Onion is an easy choice to keep on hand.

Find Red Onion on Amazon

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Why grade A

Low risk in a typical serving. A great everyday choice for a gout-friendly diet.

Per 100 g (for comparison)

Purines Low confidence
2.2 mg/100g
LowModerateHighVery high

Low for gout (< 50 mg/100g).

Fructose High confidence
1.79 g/100g
LowModerateHighVery high

Low for gout (< 3 g/100g).

This purine value is inferred, not measured directly for this food. See the sources note below for how it was derived.

Processing: NOVA 1 of 4 (unprocessed or minimally processed). How processing affects the grade.

Eating red onion as part of a bigger dish? The Dish Decoder grades the whole plate, ingredient by ingredient.

Good to know: Same species as the common onion (Allium cepa); the red colour is anthocyanin pigment and does not change purine content. Value taken from raw onion (2.2 mg/100g, USDA Purine DB 2025 - Table 2). Very low purine, like all onions; confidence is low to flag the inference.

Other forms of onions

Different cuts, species, or preparations vary in purines. The most common form of "onions" is shown first below.

More from Vegetables