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 shredded | 55 g | 1 mg | Safe |
| 2 x 1 cup shredded | 110 g | 2 mg | Safe |
| ½ x 1 cup shredded | 27 g | 0.5 mg | Safe |
🏷️ Tags
🟢 See all Vegetables rated Safe for kidney stones →
⚖️ Compare this food: · vs Milk Thistle · vs Herbed Chicken without herbed potatoes →
🔗 Related Foods
🟢 Safe alternatives (recommended)
⚠️ Other foods in this category to watch
❓ Frequently Asked Questions
Should I avoid Lettuce if I have kidney stones?
Don't overthink this one. Lettuce has 1 mg oxalate per 1 cup shredded. That's solidly safe territory for kidney stones. The number is from Harvard's latest lab work.
How much oxalate is in Lettuce?
The lab result: 1 mg per 1 cup shredded (55g serving). That's 0 mg per 100g. Harvard's ion chromatography analysis, 2024. Not crowdsourced, not estimated.
Is Lettuce a high-oxalate food?
It's low. 1 mg per 1 cup shredded is well under the 25 mg danger line. Lettuce is not the food you need to worry about.
What are the best low-oxalate alternatives to Lettuce?
Plenty of options. Scroll down to Related Foods — every 🟢 green item there is a lower-oxalate alternative to Lettuce. Same food group, way less oxalate.
How reliable is the data for Lettuce?
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.