Black Beans / Douchi (Fermented)
Legumes & Tofu · Legumes
Douchi, the fermented black beans named in the Monash app, is low FODMAP at 15 g, approximately one tablespoon. The entry also states that the food remains low FODMAP up to 500 g. That larger number describes the app's tested-range note, not a suggested serving or a meal target.
Serving sizes for black beans / douchi (fermented)
Reference serving: 15 g, about one tablespoon. The 500 g record reflects an app range note, not a recommended portion.
Tested serving sizes
| Serving | Amount | Main FODMAP | Rating |
|---|---|---|---|
| 1 tablespoon | 15 g | None detected | |
| Upper low serving stated in app note | 500 g | None detected |
Breakdown for 1 tablespoon
Is black beans / douchi (fermented) low FODMAP?
All six FODMAP groups show green at the 15 g douchi serving checked in the detail panel. A green result does not prove that the food contains no FODMAPs. Douchi is a fermented product and should not be rated using the entry for plain black beans boiled from dried.
Black Beans / Douchi (Fermented) and IBS: what to know
In a meal flavoured with douchi, the other sauce ingredients may be more relevant than the small quantity of fermented beans. Record whether you used plain douchi or a ready-made black bean sauce, since the latter may contain additional ingredients. The 500 g app note is not a reason to increase your serving beyond what suits the dish and your own tolerance.
Gut-friendly ways to eat black beans / douchi (fermented)
Use the 15 g tablespoon reference to understand the quantity of plain douchi going into a recipe. Distribute it through the dish and follow the product's preparation instructions. If buying a black bean sauce, read its ingredient list and use guidance for the sauce itself; plain fermented beans do not establish the rating of a sauce containing garlic, onion or other additions.
Frequently asked questions
Is douchi the same as ordinary cooked black beans?
This entry identifies fermented black beans. Boiled black beans are a separate food preparation with different portion guidance.
Does the 500 g figure mean I should eat that much douchi?
No. It records the app's low-FODMAP range statement. The ordinary reference serving shown is 15 g, and the larger tested amount is not a suggested intake.
Can I apply douchi's green result to black bean sauce?
Only the plain fermented-bean ingredient is covered here. A prepared sauce has its own proportions and ingredients, so its rating cannot be inferred from the douchi component alone.
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Sources and editorial notes
- Monash University FODMAP Diet App
Monash University FODMAP Diet app entry “Bean, black (Douchi), fermented” checked directly on 27 September 2026. Portion weights, traffic-light ratings and the FODMAP groups described in this guide were verified in the app. This check does not validate numerical FODMAP concentration estimates elsewhere in the catalogue.