Is Peanut oil Safe for Kidney Stones? (Safe)
mg oxalate
per serving
Serving: 1 tbsp (14 g)
Verdict: 🟢 Safe
Per 100g: 0 mg
Data: Harvard T.H. Chan SPH (2024)
What this means: Peanut oil is rated Safe (🟢). At 0 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 nuts & seeds, Peanut oil sits well below the category average of 34 mg. For context, 29 out of 51 nuts & seeds (56%) are rated 🟢 Safe (under 25 mg oxalate/serving). The average nuts & seeds in our database has 34 mg oxalate per serving — which means Peanut oil is 100% below the category norm. Within its specific category, Peanut oil 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 nuts & seeds rated Safe to compare within the same verdict level.
Why does the safe threshold matter?
The 25 mg cutoff comes from clinical guidance for stone formers. Below it, a food's oxalate contribution is small enough not to move the needle for most patients. Harvard's 2024 lab data sits behind these figures — direct measurements, not estimates. Applied to Peanut oil: 0 mg oxalate per 1 tbsp — Safe per Harvard (2024).
Can I eat this food every day?
For Safe foods (under 25 mg/serving), daily use is generally fine. Caution and Avoid foods work better as occasional items — rotate them with safer options so no single high-oxalate food becomes a habit. For Peanut oil, the measured oxalate value is 0 mg per 1 tbsp (Safe).
Where does the oxalate data come from?
The numbers come from Harvard T.H. Chan SPH's 2024 laboratory measurements, published through the OHF database. Direct lab analysis, which is why they're treated as the reference values for food oxalate. For context, Peanut oil measures 0 mg per 1 tbsp, rated Safe.
Should I also check sodium and calcium?
Definitely. Oxalate is only part of the story — high sodium raises calcium in urine, and dietary calcium (from food, not pills) binds oxalate in the gut. The food's main page lists both, so it's worth checking before you plan around it. Applied to Peanut oil: 0 mg oxalate per 1 tbsp — Safe per Harvard (2024).