How Much Oxalate Is in Barley Flour?
mg oxalate
per serving
Serving: 1/4 cup (35 g)
Verdict: 🟢 Safe
Per 100g: 41 mg
Data: Harvard T.H. Chan SPH (2024)
What this means: Barley Flour is rated Safe (🟢). At 14 mg oxalate per serving, it's well under the 25 mg safety threshold. You can include it regularly in a kidney stone diet. Pair it with calcium-rich foods (dairy, fortified plant milks) for additional protection, and drink plenty of water throughout the day.
Among grains & pasta, Barley Flour sits close to the category average of 14 mg. For context, 170 out of 201 grains & pasta (84%) are rated 🟢 Safe (under 25 mg oxalate/serving). The average grains & pasta in our database has 14 mg oxalate per serving — which means Barley Flour is 0% above the category norm. Within its specific category, Barley Flour ranks near the middle of the pack. This context matters because two 'Safe' foods can have very different oxalate levels — one might have 5 mg while another has 24 mg. Both are Safe, but the first gives you more dietary flexibility. Browse all grains & pasta rated Safe to compare within the same verdict level.
Why does oxalate per 100g matter?
Per-100g values put every food on the same scale, which is handy when serving sizes differ a lot between foods — or when your portion doesn't match the standard serving. It lets you compare apples to apples on oxalate density. Barley Flour comes in at 14 mg oxalate per 1/4 cup (Safe) in the measured database.
How accurate is the oxalate measurement?
The measurements use ion chromatography, the accepted reference method for oxalate. That means real lab values for each food rather than inferred numbers. Some natural variation exists between samples, but this is the strongest published data set. For context, Barley Flour measures 14 mg per 1/4 cup, rated Safe.
How does this compare to other foods?
Foods under 25 mg per serving are rated Safe. Foods between 25-99 mg are Caution. 100+ mg is Avoid. Check the food's category page on OxalateWatch to see how it compares to similar foods. Applied to Barley Flour: 14 mg oxalate per 1/4 cup — Safe per Harvard (2024).