What's a Safe Portion Size of Yam?

A standard serving of Yam is 1/2 cup (68 mg oxalate). For kidney stone patients, a half serving (34 mg) is more manageable. Think of Yam as a side dish or flavor accent, not the main component of your meal. The NKF recommends keeping daily oxalate under 100 mg total — so 68 mg from one food is significant, while 34 mg leaves more room for other foods.

✓ Medically Reviewed Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.

68
mg oxalate
per serving

Food: Yam, flesh only, baked
Serving: 1/2 cup (100 g)
Verdict: 🟡 Caution
Per 100g: 68 mg
Data: Harvard T.H. Chan SPH (2024)

🔄 Lower-Oxalate Alternatives

🟢 Passion Fruit or Granadilla

0 mg / serving

💡 What This Means for Your Diet

What this means: Yam is rated Caution (🟡). At 68 mg oxalate per serving, Yam is in the moderate zone (25-99 mg). It's manageable with portion awareness — try smaller servings, less frequent consumption, and pairing with calcium-rich foods. Track total daily oxalate to stay under ~100 mg.

📊 How Yam Compares

Among vegetables, Yam sits well above the category average of 27 mg. For context, 219 out of 271 vegetables (80%) are rated 🟢 Safe (under 25 mg oxalate/serving). The average vegetables in our database has 27 mg oxalate per serving — which means Yam is 151% above the category norm. Within its specific category, Yam ranks on the higher end for oxalate. This context matters because two 'Safe' foods can have very different oxalate levels — one might have 5 mg while another has 24 mg. Both are Safe, but the first gives you more dietary flexibility. Browse all vegetables rated Caution to compare within the same verdict level.

❓ Related Questions

How do I track oxalate across a whole day?

Add up the oxalate from each food you eat. Aim for under 100 mg total for the day as a general reference. Spread oxalate across meals rather than concentrating it in one. Drink plenty of water to keep urine dilute.

What if I accidentally eat a large portion?

Don't panic — one high-oxalate meal doesn't immediately cause a stone. Drink extra water for the next 12-24 hours to dilute your urine. Return to your normal careful portions at the next meal.

How do I know if my portions are right?

If you consistently produce pale yellow urine, drink plenty of water, and spread oxalate across meals rather than concentrating it, you're likely in good shape. Track oxalate for a few days to get a sense of your typical intake.

This is dietary reference information, NOT medical advice. Talk to your doctor or a registered dietitian before changing your diet. Oxalate tolerance varies by person, stone type, and medication.