Which purine base makes up most of this number?

Guanine — 6.3 mg of the 10.5 mg per 100 g total. The rest is adenine 4.2, hypoxanthine 0, xanthine 0.

Is this value for raw or cooked food?

Raw — the source entry is Mustard spinach, (komatsuna), mature, 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.

Mustard spinach, (komatsuna), mature, raw

Low purine

Vegetables

Purine content

10.5 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	10.5 mg
— Adenine	4.2 mg
— Guanine	6.3 mg
— Hypoxanthine	0 mg
— Xanthine	0 mg
Fructose	No data available
Calories	22 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 #168438.

If you want something similar

Within vegetables, the same table also lists Green beans at 7.5 mg and Balsam pear (goya), raw at 9.9 mg per 100 g.

From the author

Personal experience of someone living with gout

I boil it, chop it, and dress it with olive oil, salt and black pepper.

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

Questions

Which purine base makes up most of this number?: Guanine — 6.3 mg of the 10.5 mg per 100 g total. The rest is adenine 4.2, hypoxanthine 0, xanthine 0.
Is this value for raw or cooked food?: Raw — the source entry is Mustard spinach, (komatsuna), mature, 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.