Which purine base makes up most of this number?

Hypoxanthine — 142.2 mg of the 173.9 mg per 100 g total. The rest is adenine 12.5, guanine 9.7, xanthine 9.5.

Is this value for raw or cooked food?

Raw — the source entry is Beef ribeye, steak, boneless, choice, raw. Cooking changes water content, so compare like with like.

Why is hypoxanthine the largest fraction here?

Hypoxanthine accounts for 142.2 of the 173.9 mg total — about 82% of the number.

Beef ribeye, steak, boneless, choice, raw

Moderate purine

Beef (other than organs)

Purine content

174 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	174 mg
— Adenine	12.5 mg
— Guanine	9.7 mg
— Hypoxanthine	142 mg
— Xanthine	9.5 mg
Fructose	No data available
Calories	260 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: USDA and ODS-NIH Database for the Purine Content of Foods, Release 2.0 (2025) — USDA analytical data (FDC Foundation Foods program).
Fructose and calories: USDA FoodData Central record #2646172.

If you want something similar

Within beef (other than organs), the same table also lists Beef roast, cooked (unspecified) at 124.8 mg and Beef, sirloin, raw at 124.8 mg per 100 g.

From the author

Personal experience of someone living with gout

I eat it as usual between flares and skip it during one.

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

Questions

Which purine base makes up most of this number?: Hypoxanthine — 142.2 mg of the 173.9 mg per 100 g total. The rest is adenine 12.5, guanine 9.7, xanthine 9.5.
Is this value for raw or cooked food?: Raw — the source entry is Beef ribeye, steak, boneless, choice, raw. Cooking changes water content, so compare like with like.
Why is hypoxanthine the largest fraction here?: Hypoxanthine accounts for 142.2 of the 173.9 mg total — about 82% 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.