Short answer: Yes — white, red, Yukon Gold and new potatoes are low FODMAP in unlimited servings per Monash University. Sweet potato is low FODMAP only up to ½ cup (75 g).
Key Takeaways
- White potatoes (all varieties) = no FODMAP limit 🟢
- Sweet potato = ½ cup (75 g) max — mannitol climbs above this
- Skin-on is fine; the skin contains no additional FODMAPs
- Watch toppings: sour cream, garlic butter, and onion gravy are the usual triggers
Monash Portion Chart
| Potato Type | Safe Serving | Status |
|---|---|---|
| White (russet, red, Yukon) | Unlimited | 🟢 Low |
| New potatoes | Unlimited | 🟢 Low |
| Baby potatoes | Unlimited | 🟢 Low |
| Sweet potato | ½ cup (75 g) | 🟢 Low |
| Sweet potato | 1 cup (150 g) | 🟡 Moderate |
| Sweet potato | 1½+ cups | 🔴 High (mannitol) |
Why White Potatoes Are So Safe
White potatoes are naturally FODMAP-free. They're one of the few starchy staples you can eat freely during elimination — making them a cornerstone of low FODMAP meal prep.
Cooking Methods (All Safe)
- Boiled, mashed, baked, roasted — all low FODMAP
- Fries — safe if fried in plain oil (avoid seasoned fries with onion/garlic powder)
- Potato salad — use lactose-free mayo, spring onion greens only, chives
Toppings to Avoid
- Regular sour cream (high in lactose above 2 tbsp) — use lactose-free
- Butter with garlic
- Onion gravy or French onion dip
- Cheese sauces made with regular milk
Safe Toppings
- Lactose-free sour cream + chives
- Garlic-infused oil + sea salt
- Cheddar (40 g), feta (40 g), or lactose-free cream cheese
- Green tops of spring onions
- Fresh herbs (parsley, dill, rosemary)
Recipes That Use Potatoes
- One Pan Chicken and Rice — swap in baby potatoes
- Roasted Low FODMAP Vegetables — potatoes work perfectly
- Low FODMAP Dinner Hub — dinner ideas
FAQs
1. Are potato chips low FODMAP?
Plain salted chips are safe (about 50 g). Avoid sour cream & onion, BBQ (often has garlic), or cheese-flavored.
2. Is mashed potato low FODMAP?
Yes — use lactose-free milk and plain butter or garlic-infused oil.
3. Are sweet potato fries low FODMAP?
Only at small portions (about ½ cup / 75 g). Larger servings become high FODMAP due to mannitol.
4. Is potato starch low FODMAP?
Yes — pure potato starch is FODMAP-free and safe in baking.
Sources: Monash University FODMAP App, Kate Scarlata RDN
Reviewed by our editorial team. Informational only — not medical advice.