Oxalate <25 mg/serving
Oxalate 25-99 mg/serving
Oxalate ≥100 mg/serving
Peanut butter is the most-Googled nut butter by a wide margin, and the oxalate answer is moderate — not alarming, not negligible. Two tablespoons contain about 36 mg oxalate — over the 25 mg safe threshold, putting it in Caution territory. The good news: peanuts are legumes, not tree nuts, and their oxalate is significantly lower than almonds (165 mg) or cashews. Two tablespoons on white toast is manageable as part of a low-oxalate day. A full peanut butter sandwich plus a smoothie with peanut butter could push toward 80+ mg for one meal — that's when it matters. Portion is everything with peanut butter. Measure it (seriously — most people pour 3-4 tablespoons when they think they're using 2). Spread it thin.
📊 Nutrition at a Glance
⚠️ Moderate Sodium
Nuts has 220 mg sodium per 100g. While not critically high, kidney stone patients should monitor sodium intake as excess can raise urinary calcium.
📏 Oxalate by Serving Size
| Serving | Weight | Oxalate | Verdict |
|---|---|---|---|
| 29 g | 36 mg | Caution | |
| 2 x | 58 g | 72 mg | Caution |
| ½ x | 14 g | 18 mg | Safe |
🏷️ Tags
🟡 See all Nuts & Seeds rated Caution for kidney stones →
🔗 Related Foods
🟢 Safe alternatives (recommended)
⚠️ Other foods in this category to watch
❓ Frequently Asked Questions
Is Nuts safe for kidney stones?
It's a 'watch it' food, not a 'stop it' food. 36 mg per puts Nuts in the caution range. Pair it with calcium-rich foods and you'll blunt some of the oxalate absorption.
What's the oxalate content of Nuts?
The lab result: 36 mg per (29g serving). That's 0 mg per 100g. Harvard's ion chromatography analysis, 2024. Not crowdsourced, not estimated.
Is Nuts a high-oxalate food?
It's in the moderate range. 36 mg per sits between safe and high-risk. Manageable if you watch how much you eat.
What can I eat instead of Nuts?
Look at the 'Safe Alternatives' section right below this FAQ. Those foods are all under 25 mg oxalate per serving and in the same category as Nuts. Pick from those.
How much Nuts is safe to eat?
A standard serving () of Nuts gives you 36 mg oxalate. Half that = 18 mg. That's the difference between a caution-level and a safe-level meal. Portions matter a lot here.
How much sodium does Nuts have?
220 mg sodium per 100g in Nuts. Well under the 460 mg threshold. One less thing on your kidney stone checklist.