Which purine base makes up most of this number?

Hypoxanthine — 194 mg of the 221.6 mg per 100 g total. The rest is adenine 15.3, guanine 10.6, xanthine 1.7.

Why is hypoxanthine the largest fraction here?

Hypoxanthine accounts for 194 of the 221.6 mg total — about 88% of the number.

Shrimp, deep-water

High purine

Finfish and shellfish

Purine content

222 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	222 mg
— Adenine	15.3 mg
— Guanine	10.6 mg
— Hypoxanthine	194 mg
— Xanthine	1.7 mg
Fructose	0 g
Calories	71 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: Kaneko, K., et al. (2020). Determination of total purine and purine base content of 80 food products to aid nutritional therapy for gout and hyperuricemia. Nucleosides, Nucleotides, and Nucleic Acids, 39(10-12), 1449-57..
Fructose and calories: USDA FoodData Central record #174210.

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 skip them during a flare and keep the portion small otherwise.

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

Questions

Which purine base makes up most of this number?: Hypoxanthine — 194 mg of the 221.6 mg per 100 g total. The rest is adenine 15.3, guanine 10.6, xanthine 1.7.
Why is hypoxanthine the largest fraction here?: Hypoxanthine accounts for 194 of the 221.6 mg total — about 88% 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 high purine foods.