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 |
|---|---|---|---|
| 2 tbsp | 10 g | 1 mg | Safe |
| 2 x 2 tbsp | 20 g | 2 mg | Safe |
| ½ x 2 tbsp | 5 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 Seaweed if I have kidney stones?
Short answer: yes. Longer answer: at 1 mg per 2 tbsp, Seaweed is one of the safer things you can eat if you're watching oxalate. Harvard T.H. Chan SPH measured this directly.
How much oxalate is in Seaweed?
Here are the numbers: 1 mg oxalate in one 2 tbsp of Seaweed (10g). Per 100 grams, that's 10 mg. Harvard T.H. Chan SPH did the lab work (2024) — these aren't database guesses.
Is Seaweed high in oxalates?
Low. 1 mg per 2 tbsp puts Seaweed firmly in the low-oxalate category. Safe for regular eating if you're managing kidney stones.
What are the best low-oxalate alternatives to Seaweed?
Substitutes exist. The safe alternatives listed below are all low-oxalate foods in the same family as Seaweed. Grab one of those and you dodge the oxalate while keeping similar flavors.
How reliable is the data for Seaweed?
The 1 mg oxalate figure is direct from Harvard's lab — measured, not estimated. The sodium/protein/calcium numbers aren't fully matched yet. When they are, we'll update.