Sweet Potato (purple, unpeeled, raw)
Vegetables · Root Vegetables
Purple sweet potato is low FODMAP at 75 g in the checked Monash entry for raw, unpeeled purple kumara. That is described as about one-third of a cup. The app gives an amber reference of 150 g and a red reference of 189 g, both associated with fructans.
Serving sizes for sweet potato (purple, unpeeled, raw)
Purple sweet potato: 75 g green, 150 g amber and 189 g red, based on raw unpeeled weight before cooking.
Tested serving sizes
| Serving | Amount | Main FODMAP | Rating |
|---|---|---|---|
| 1/3 cup | 75 g | Mannitol 0.05 g | |
| 150 g portion | 150 g | Fructans 0.1 g | |
| 189 g portion | 189 g | Fructans 0.3 g |
Breakdown for 0.33 cups
Is sweet potato (purple, unpeeled, raw) low FODMAP?
At the purple variety's green portion, fructose, lactose, mannitol, sorbitol, GOS and fructans are all green. Only fructans change at the larger references: amber at the two-thirds-cup amount and red at the three-quarter-cup amount. The colour of the flesh is useful for matching this entry, but is not itself a FODMAP test.
Sweet Potato (purple, unpeeled, raw) and IBS: what to know
If you alternate between kumara varieties, keep the variety name with your portion notes. A purple ingredient used in a dessert or bread still needs consideration alongside the rest of that recipe. The raw ingredient's rating does not assign a rating to every purple sweet-potato product.
Gut-friendly ways to eat sweet potato (purple, unpeeled, raw)
Measure purple kumara before it goes into the oven or saucepan, retaining the skin to match the source preparation. Cut pieces can be distributed through a dish once the starting amount is known. The orange sweet-potato guide offers a close comparison, while white sweet potato has different larger-portion references.
Frequently asked questions
Are purple and orange kumara exactly the same in the app?
Their green and amber weights match in this check, but their red reference weights differ slightly. Keeping separate entries preserves the actual source figures.
Is purple sweet-potato flour covered by this serving?
No. A flour or dried powder has a different preparation from raw unpeeled kumara. This observation does not establish an allowance for it.
How should I track purple sweet potato in a mixed roast?
Record its raw starting weight separately from other vegetables, then note how the batch was divided. The total finished tray weight does not isolate the kumara amount.
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Sources and editorial notes
- Monash University FODMAP Diet App
Monash University FODMAP Diet app entry “Potato, sweet / kumara, purple, unpeeled, raw” checked directly on 27 September 2026. The portion weights, traffic-light ratings and FODMAP groups discussed here were verified in matching detail panels. Numerical FODMAP concentration estimates elsewhere in the catalogue were not validated by this check.