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Is Butter Safe for Kidney Stones? (Safe)

Yes — Butter is kidney-stone-safe. At just 0 mg oxalate per 1 tbsp, it lands well under the 25 mg safety line. This isn't an estimate or an average — Harvard's 2024 lab measured it directly via ion chromatography. You can eat Butter regularly without it eating into your daily oxalate budget.
✓ Lab-Verified Data Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.
0
mg oxalate
per serving
Food: Butter
Serving: 1 tbsp (14 g)
Verdict: 🟢 Safe
Per 100g: 2 mg
Data: Harvard T.H. Chan SPH (2024)
🔄 Lower-Oxalate Alternatives
🟢 Cottage Cheese Milk Products
0 mg / serving
🟢 Ice Cream Milk Products
0 mg / serving
🟢 Kefir Milk Products
0 mg / serving
🟢 Sour Cream Milk Products
0 mg / serving
💡 What This Means for Your Diet

The bottom line for Butter: Safe (🟢), with 0 mg oxalate per serving — comfortably below the 25 mg safe cutoff. There's no need to limit it. Just keep your usual kidney stone basics in place: water throughout the day and calcium-rich foods at meals.

📊 Butter vs. Other Dairy & Eggs

Putting Butter in context: it lands well below the category average of 3 mg. In the database, 95% of dairy & eggs (87 of 91) fall in the 🟢 Safe group (under 25 mg oxalate/serving). The typical dairy & eggs here averages 3 mg oxalate per serving, so Butter runs 100% below that baseline. That places it among the lower-oxalate options in its category. Why this matters: the gap between two Safe foods can be wide — one may hold 5 mg oxalate while another sits at 24 mg. The lower one leaves more room in your day. See all dairy & eggs rated Safe for a full side-by-side.

❓ Related Questions

Why does the safe threshold matter?

The 25 mg line is the reference point clinicians use to separate everyday foods from ones that need caution. Every value on this page traces back to Harvard's 2024 lab analysis, so the threshold is applied to measured data rather than estimates. Butter comes in at 0 mg oxalate per 1 tbsp (Safe) in the measured database.

Can I eat this food every day?

Daily eating is fine for Safe foods (under 25 mg/serving). For Caution or Avoid foods, spread them out and alternate with low-oxalate picks. The idea is keeping your weekly oxalate load manageable, not eliminating any single food. For context, Butter measures 0 mg per 1 tbsp, rated Safe.

Where does the oxalate data come from?

Harvard T.H. Chan School of Public Health (2024) via the OHF database. These are direct laboratory measurements — the most reliable oxalate data available for food. Butter comes in at 0 mg oxalate per 1 tbsp (Safe) in the measured database.

Should I also check sodium and calcium?

Yes — kidney stone risk isn't just about oxalate. High sodium increases urinary calcium (a stone promoter). Adequate dietary calcium (from food, not supplements) actually binds oxalate in your gut. Check the food's full nutrition page for the complete picture. For Butter, the measured oxalate value is 0 mg per 1 tbsp (Safe).

Butter full page 🟢 Safe foods Safe foods
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.