Oxalate <25 mg/serving
Oxalate 25-99 mg/serving
Oxalate ≥100 mg/serving
📊 Nutrition at a Glance
📏 Oxalate by Serving Size
| Serving | Weight | Oxalate | Verdict |
|---|---|---|---|
| 1 cup sliced | 87 g | 1 mg | Safe |
| 2 x 1 cup sliced | 174 g | 2 mg | Safe |
| ½ x 1 cup sliced | 43 g | 0.5 mg | Safe |
🏷️ Tags
🟢 See all Vegetables rated Safe for kidney stones →
🔗 Related Foods
🟢 Safe alternatives (recommended)
⚠️ Other foods in this category to watch
❓ Frequently Asked Questions
Should I avoid Fennel bulb if I have kidney stones?
Safe pick. 1 mg oxalate per 1 cup sliced means Fennel bulb is comfortably in the green zone. Harvard's 2024 lab data says so. No need to track this one obsessively.
How much oxalate is in Fennel bulb?
The lab result: 1 mg per 1 cup sliced (87g serving). That's 0 mg per 100g. Harvard's ion chromatography analysis, 2024. Not crowdsourced, not estimated.
Is Fennel bulb a high-oxalate food?
It's low. 1 mg per 1 cup sliced is well under the 25 mg danger line. Fennel bulb is not the food you need to worry about.
What can I eat instead of Fennel bulb?
Substitutes exist. The safe alternatives listed below are all low-oxalate foods in the same family as Fennel bulb. Grab one of those and you dodge the oxalate while keeping similar flavors.
How reliable is the data for Fennel bulb?
The oxalate number for Fennel bulb — 1 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.