Fermented seasoning
Iru
Fermented locust beans
Fermented locust beans that contribute a powerful savoury aroma and depth to many dishes.
Field note
Iru is a fermented seasoning rather than a dry spice in the narrow sense. Its flavour is transformative in soups and stews, and its production, names and use vary across communities.
Research, not a remedy
Health evidence
Analyses of fermented Parkia biglobosa seeds report protein, fat and amino acids, while fermentation can reduce some antinutritional factors. Composition varies by seed, process and producer, and nutrient analysis is not proof of disease prevention. Research reviews also identify substantial gaps in the available composition data.
Food information only. Evidence from extracts or supplements does not automatically apply to normal culinary portions and is not medical advice.
In the kitchen
Flavour
Deeply savoury and umami-rich
Aroma
Strong and fermented
Heat
None
Form used
Fermented whole or mashed beans
How to use
Add a small amount during cooking so its flavour can disperse through the dish.
Buying & keeping
Storage
Follow the producer's guidance; keep fresh products chilled where appropriate.
Sources & review
This field note is awaiting its wider editorial source review. Health evidence, where present, is cited separately above.