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 tsp | 5 g | 90 mg | Caution |
| 2 x 1 tsp | 10 g | 180 mg | Avoid |
| ½ x 1 tsp | 2 g | 45 mg | Caution |
🏷️ Tags
🟡 See all Vegetables rated Caution for kidney stones →
⚖️ Compare this food: · vs Lettuce · vs Zucchini →
🔗 Related Foods
🟢 Safe alternatives (recommended)
⚠️ Other foods in this category to watch
❓ Frequently Asked Questions
Is Milk Thistle safe for kidney stones?
Proceed, but with awareness. Milk Thistle delivers 90 mg oxalate per 1 tsp. That's moderate — above the safe line, below the danger line. Portion size is your friend here.
How much oxalate is in Milk Thistle?
Here are the numbers: 90 mg oxalate in one 1 tsp of Milk Thistle (5g). Per 100 grams, that's 1802 mg. Harvard T.H. Chan SPH did the lab work (2024) — these aren't database guesses.
Is Milk Thistle a high-oxalate food?
Moderate. Milk Thistle has 90 mg oxalate per 1 tsp — not high enough to panic, not low enough to ignore. Portions matter with this one.
What are the best low-oxalate alternatives to Milk Thistle?
There are almost always safer swaps in the same food family. For Milk Thistle, check the related foods section below — the green-marked ones are your best bets. All verified by Harvard (2024).
How much Milk Thistle is safe to eat?
A standard serving (1 tsp) of Milk Thistle gives you 90 mg oxalate. Half that = 45 mg. That's the difference between a caution-level and a safe-level meal. Portions matter a lot here.
How reliable is the data for Milk Thistle?
The oxalate number for Milk Thistle — 90 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.