How Much Sodium Is in Flour?

Good news — Flour is low in sodium at 0 mg per 100g. That's well below the 460 mg threshold where sodium becomes a concern for kidney stone patients. Keep it low-sodium by avoiding added salt in preparation.

✓ Medically Reviewed Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.

7
mg oxalate
per serving

Food: Flour, Baking, Gluten-free, Bob's Red Mill
Serving: 1/4 cup (37 g)
Verdict: 🟢 Safe
Per 100g: 19 mg
Data: Harvard T.H. Chan SPH (2024)

💡 What This Means for Your Diet

What this means: Flour is rated Safe (🟢). At 7 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.

📊 How Flour Compares

Among grains & pasta, Flour sits below 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 Flour is 50% below the category norm. Within its specific category, Flour ranks among the lower-oxalate options. 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.

❓ Related Questions

How does sodium affect kidney stones?

High sodium intake increases calcium in urine (hypercalciuria), which raises the risk of calcium-based kidney stones. The general recommendation is under 2,300 mg/day — lower if you're actively preventing stones.

What's a safe daily sodium target?

Aim for under 2,000-2,300 mg per day. Check labels on packaged foods — sodium adds up quickly. Cooking at home with fresh ingredients gives you the most control over sodium intake.

How do I reduce sodium when eating out?

Ask for sauces and dressings on the side. Choose grilled/steamed over fried. Skip the soup (often very high sodium). Request no added salt. These small changes make a measurable difference.

This is dietary reference information, NOT medical advice. Talk to your doctor or a registered dietitian before changing your diet. Oxalate tolerance varies by person, stone type, and medication.