Oxalate <25 mg/serving
Oxalate 25-99 mg/serving
Oxalate ≥100 mg/serving
📊 Nutrition at a Glance
⚠️ Moderate Sodium
Kelp has 233 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 |
|---|---|---|---|
| 1 serving | 100 g | 6 mg | Safe |
| 2 x 1 serving | 200 g | 12 mg | Safe |
| ½ x 1 serving | 50 g | 3 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
Is Kelp safe for kidney stones?
Safe pick. 6 mg oxalate per 1 serving means Kelp is comfortably in the green zone. Harvard's 2024 lab data says so. No need to track this one obsessively.
What's the oxalate content of Kelp?
The lab result: 6 mg per 1 serving (100g serving). That's 200 mg per 100g. Harvard's ion chromatography analysis, 2024. Not crowdsourced, not estimated.
Is Kelp high in oxalates?
Nope. Kelp is a low-oxalate food — just 6 mg per 1 serving. Well under the 25 mg cutoff. You're in the clear with this one.
What can I eat instead of Kelp?
Substitutes exist. The safe alternatives listed below are all low-oxalate foods in the same family as Kelp. Grab one of those and you dodge the oxalate while keeping similar flavors.
How much sodium does Kelp have?
233 mg sodium per 100g in Kelp. Well under the 460 mg threshold. One less thing on your kidney stone checklist.