Oxalate <25 mg/serving
Oxalate 25-99 mg/serving
Oxalate ≥100 mg/serving
The saying 'an apple a day keeps the doctor away' holds up for kidney stone patients too. One medium apple has about 1 mg of oxalate — negligible. Note: our database entry shows dried apples at 2 mg, but fresh apples from the Harvard database are comparably low. Apples are portable, inexpensive year-round, and require no prep. The fiber (pectin) may help with gut health. Eat them with the skin on for maximum fiber. Apple juice is more concentrated and lacks fiber, but remains low oxalate. Whole apples are always the better choice.
📊 Nutrition at a Glance
📏 Oxalate by Serving Size
| Serving | Weight | Oxalate | Verdict |
|---|---|---|---|
| 1/4 cup | 30 g | 2 mg | Safe |
| 2 x 1/4 cup | 60 g | 4 mg | Safe |
| ½ x 1/4 cup | 15 g | 1 mg | Safe |
🏷️ Tags
🟢 See all Fruits rated Safe for kidney stones →
🔗 Related Foods
🟢 Safe alternatives (recommended)
⚠️ Other foods in this category to watch
❓ Frequently Asked Questions
Is Apples safe for kidney stones?
Don't overthink this one. Apples has 2 mg oxalate per 1/4 cup. That's solidly safe territory for kidney stones. The number is from Harvard's latest lab work.
What's the oxalate content of Apples?
Quick math: 1/4 cup of Apples = 2 mg oxalate. 100g = 0 mg. Both numbers come from Harvard's latest lab measurements. Not AI, not a database, actual lab work.
Is Apples low or high oxalate?
Definitely low. 2 mg oxalate per 1/4 cup. That's the green zone. No restrictions needed for this food.
What are the best low-oxalate alternatives to Apples?
There are almost always safer swaps in the same food family. For Apples, check the related foods section below — the green-marked ones are your best bets. All verified by Harvard (2024).
How reliable is the data for Apples?
The oxalate number for Apples — 2 mg per serving — is from Harvard's 2024 lab analysis. That part is solid. The USDA nutrition data (sodium, protein, calcium) is still being matched — we'll update when it's available.