Oxalate <25 mg/serving
Oxalate 25-99 mg/serving
Oxalate ≥100 mg/serving
📊 Nutrition at a Glance
How the form changes the number: preparation is the real variable across this family. Boiling leaches a meaningful share of soluble oxalate into the cooking water — commonly 30-50% for plant foods — while raw and dry-heat forms keep essentially all of it, so the same base food can land in different brackets depending on how it is cooked. This page tracks Barley Grain at 9 mg per serving, in the middle of the family range. Related forms in this family: Polenta Grain (3 mg), Seitan Wheat Gluten Grain (15 mg), Wheat Grain (17 mg).
📏 Oxalate by Serving Size
| Serving | Weight | Oxalate | Verdict |
|---|---|---|---|
| 1/2 cup | 84 g | 9 mg | Low Oxalate |
| 2 x 1/2 cup | 168 g | 18 mg | Low Oxalate |
| ½ x 1/2 cup | 42 g | 4.5 mg | Low Oxalate |
🏷️ Tags
🟢 See all Grains & Pasta rated Safe for kidney stones →
🔗 Related Foods
🟢 Safe alternatives (recommended)
⚠️ Other foods in this category to watch
❓ Frequently Asked Questions
Is Grain safe for kidney stones?
Don't overthink this one. Grain has 9 mg oxalate per 1/2 cup. That's solidly safe territory for kidney stones. The number is from Harvard's latest lab work.
How much oxalate is in Grain?
9 mg — that's the oxalate in a standard 1/2 cup of Grain. For the 100g comparison freaks: 10 mg. Source is Harvard's 2024 food analysis project.
Is Grain a high-oxalate food?
Definitely low. 9 mg oxalate per 1/2 cup. That's the green zone. No restrictions needed for this food.
What can I eat instead of Grain?
Don't give up the whole category — just pick a safer member of it. The green foods in the related section all work as substitutes for Grain with a fraction of the oxalate.
How much sodium does Grain have?
Low sodium: 0 mg/100g. That's a non-issue for kidney stones. Just don't undo it by drowning it in salt during cooking.