How many Mussels can I eat with gout?

A typical serving is about 85 g, which delivers 249 mg of purines, or about 62% of a ~400 mg working daily target. Keep them to a small, occasional portion and avoid them during a flare.

Are Mussels high in purines?

Mussels are high in purines by weight: about 293 mg per 100 g. A typical 85 g serving works out to about 249 mg, or about 62% of a ~400 mg working daily target.

Do Mussels cause gout?

No single food causes gout; it develops from high uric acid over time. But Mussels are graded D, meaning they are high enough in purines to push uric acid up and can help set off a flare in people who are prone to one.

Mussels

Mussels are higher risk. Keep portions small and occasional, especially during a flare. A typical 85 g serving has about 249 mg of purines, about 62% of a ~400 mg working daily target.

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

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How much can I eat?

Units

This serving

3 oz

85 g

Purine / serving

249 mg

% daily purine

62%

Purines in this serving

0 mg~400 mg daily limit

Adjust the serving

1 oz5 oz

Up to about 2 oz (70 g) keeps you under half a day's purines.

Portion size is what matters most here, and it’s easy to misjudge by eye. A kitchen scale makes it simple.

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Why grade D: per 100 g and processing

Per 100 g (for comparison)

Purines

293 mg/100g

LowModerateHighVery high

High for gout (150–300 mg/100g).

Fructose

0 g/100g

LowModerateHighVery high

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

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

Good to know: Measured at 292.5 mg/100g by HPLC on four fresh samples (Fukuuchi 2026), on the whole edible animal including the viscera, which is where most of a bivalve's purine sits. Treat the absolute figure as a good estimate rather than a settled one: the same study reports oyster at 42.8 mg/100g against 184.5 in Kaneko 2014 and attributes the gap to analytical method and harvest timing. Both readings put mussels well above the level worth limiting.

Diet is part of the picture, not all of it

For most people the body makes the majority of its own uric acid. Food contributes the smaller share. Eating well lowers your risk and helps you feel in control, but for many people diet alone does not bring uric acid down enough to stop flares. Medication often does the heavy lifting. Use these grades to make easier daily choices, and work with your doctor on the full plan.

Sources

1. Purine data: Fukuuchi 2026 Evidence tier: Peer-reviewed literature Replication: 4 samples

Source details
Fukuuchi T, Ishii A, Takayanagi F, Kaneko K, Saigusa D, Yamaoka N. (2026). Quantitative analysis of total purine content and molecular purine composition in shellfish. Gout and Uric & Nucleic Acids. 50(1):37-43. doi:10.14867/gnamtsunyo.50.1_37
2. Fructose (derived): Biochemical Certainty (fructose = 0) Evidence tier: Lab-verified Animal products (meat, seafood, eggs, plain dairy) contain no fructose by biochemical composition.

How these numbers work

Values are per 100g unless a note says otherwise, rounded to three significant figures. Per-serving figures are calculated from the unrounded measurement, so recomputing from the rounded number can differ by a milligram or so. A single determination is normal in food composition tables, not a defect. The fructose figure is derived, not a label value: it counts free fructose plus half of sucrose, because sucrose is half fructose and the body treats both the same way. A sucrose-sweetened food therefore carries roughly twice this much total sugar.

Last reviewed August 11, 2026.