Which purine base makes up most of this number?

Hypoxanthine — 97.2 mg of the 124.7 mg per 100 g total. The rest is adenine 15.8, guanine 11.7, xanthine 0.

Is this value for raw or cooked food?

Raw — the source entry is Salmon, chum, raw. Cooking changes water content, so compare like with like.

Why is hypoxanthine the largest fraction here?

Hypoxanthine accounts for 97.2 of the 124.7 mg total — about 78% of the number.

Salmon, chum, raw

Moderate purine

Finfish and shellfish

Purine content

125 mgper 100 g

The level label is a plain categorization of the number above — not a statement about whether this food fits your diet. See the full disclaimer.

Composition — per 100 g

Purine, total	125 mg
— Adenine	15.8 mg
— Guanine	11.7 mg
— Hypoxanthine	97.2 mg
— Xanthine	0 mg
Fructose	No data available
Calories	120 kcal

Missing figures are shown as “No data available”; values are copied from the sources below and are never estimated. Laboratory values differ between studies and samples.

Where these numbers come from

Purine total and fractions: Qu, X., et al. (2017). Determination of four different purines and their content change in seafood by high‐performance liquid chromatography. Journal of the Science of Food and Agriculture, 97(2), 520-5..
Fructose and calories: USDA FoodData Central record #173689.

If you want something similar

Within finfish and shellfish, the same table also lists Oysters, canned at 107 mg and Cod, Atlantic, wild, raw at 110.3 mg per 100 g.

From the author

Personal experience of someone living with gout

I don't eat it — I can't stand raw fish.

Personal experience — not medical advice. Read the full disclaimer.

Questions

Which purine base makes up most of this number?: Hypoxanthine — 97.2 mg of the 124.7 mg per 100 g total. The rest is adenine 15.8, guanine 11.7, xanthine 0.
Is this value for raw or cooked food?: Raw — the source entry is Salmon, chum, raw. Cooking changes water content, so compare like with like.
Why is hypoxanthine the largest fraction here?: Hypoxanthine accounts for 97.2 of the 124.7 mg total — about 78% of the number.

Looking for a different food? Search the full database — every entry there links back to its source, whether or not it has a page like this one. Or browse moderate purine foods.