Oxalate <25 mg/serving
Oxalate 25-99 mg/serving
Oxalate ≥100 mg/serving
Radishes are essentially oxalate-free at 1 mg per half-cup. They add a peppery crunch to salads and tacos, and they're one of the fastest vegetables to grow if you garden. Pickled radishes, roasted radishes (the heat mellows the bite), or sliced raw with salt — all safe. Radishes are so low in oxalate that you'd have to eat them by the pound for it to register. A perfect garnish vegetable with zero downsides.
📊 Nutrition at a Glance
How the form changes the number: preparation is the real variable across this family. Boiling leaches a meaningful share of soluble oxalate into the cooking water — commonly 30-50% for plant foods — while raw and dry-heat forms keep essentially all of it, so the same base food can land in different brackets depending on how it is cooked. This page tracks Radish (Raw) at 1 mg per serving, in line with the rest of the family. Related forms in this family: Radish (Red or Daikon) (1 mg).
📏 Oxalate by Serving Size
| Serving | Weight | Oxalate | Verdict |
|---|---|---|---|
| 1/2 cup sliced | 58 g | 1 mg | Low Oxalate |
| 2 x 1/2 cup sliced | 116 g | 2 mg | Low Oxalate |
| ½ x 1/2 cup sliced | 29 g | 0.5 mg | Low Oxalate |
🏷️ 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 Radish if I have kidney stones?
It's fine. Radish has 1 mg of oxalate per 1/2 cup sliced. That's low enough that kidney stone patients don't really need to worry about it. Harvard did the measuring, not us.
What's the oxalate content of Radish?
The exact figure: 1 mg of oxalate per 1/2 cup sliced of Radish. Works out to 1.7 mg/100g. This is the number kidney stone patients actually need. Harvard (2024) verified.
Is Radish high in oxalates?
Nope. Radish is a low-oxalate food — just 1 mg per 1/2 cup sliced. Well under the 25 mg cutoff. You're in the clear with this one.
What are the best low-oxalate alternatives to Radish?
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 Radish. Pick from those.
How reliable is the data for Radish?
Oxalate: very reliable (Harvard 2024 lab measurement). Other nutrients: still being matched to USDA data. The oxalate figure is what matters for a kidney stone decision, and that one's solid.