Which purine base makes up most of this number?

Guanine — 18.6 mg of the 32.6 mg per 100 g total. The rest is adenine 14, hypoxanthine 0, xanthine 0.

Is this value for raw or cooked food?

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

Why are hypoxanthine and xanthine zero here?

The source reports a measured zero for both bases in this entry — not a missing value.

Rice, white, raw

Low purine

Cereal grains and grain-based products

Purine content

32.6 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	32.6 mg
— Adenine	14 mg
— Guanine	18.6 mg
— Hypoxanthine	0 mg
— Xanthine	0 mg
Fructose	No data available
Calories	370 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. (2014). Total purine and purine base content of common foodstuffs for facilitating nutritional therapy for gout and hyperuricemia. Biological and Pharmaceutical Bulletin, 37(5), 709-21..
Fructose and calories: USDA FoodData Central record #2512381.

If you want something similar

Within cereal grains and grain-based products, the same table also lists Corn cereal at 1 mg and Bread (no further specified) at 4.4 mg per 100 g.

From the author

Personal experience of someone living with gout

One of my everyday staples — it needs cooking, obviously.

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

Questions

Which purine base makes up most of this number?: Guanine — 18.6 mg of the 32.6 mg per 100 g total. The rest is adenine 14, hypoxanthine 0, xanthine 0.
Is this value for raw or cooked food?: Raw — the source entry is Rice, white, raw. Cooking changes water content, so compare like with like.
Why are hypoxanthine and xanthine zero here?: The source reports a measured zero for both bases in this entry — not a missing value.

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 low purine foods.