Herbarium of the Ancients — Detailed RecordFR · EN
Black Mustard
Brassica nigra
Read before use: the information below describes traditional and informational uses — it does not replace the advice of a healthcare professional. In case of doubt, pregnancy, breastfeeding, ongoing treatment, or use in children, seek advice before use.
Enhanced precautions for this plant: Never apply the poultice directly to the skin without protection (cloth or gauze): black mustard is highly irritating and can cause burns or blisters with prolonged contact. External use is not recommended for children, pregnant or breastfeeding women, and people with sensitive skin. Do not ingest seeds in large doses: they can severely irritate digestive mucous membranes. In case of intense redness, pain, or skin lesions, remove the preparation immediately and rinse thoroughly; seek advice from a healthcare professional if in doubt.
Poultice — Seeds ground into flour
Mustard poultice (sinapism)
Mix the seed flour with warm water to obtain a paste, spread it on a thin cloth, then apply to the affected area, checking the skin every few minutes. Remove as soon as marked redness appears, never leave in place for more than a few minutes. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.
Foot bath — Ground seeds
Warming foot bath
Dilute a small amount of mustard flour in a basin of hot water and soak feet for about ten minutes while monitoring skin tolerance. Rinse thoroughly with clear water afterwards. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.
Powder — Seeds
Traditional digestive condiment
A pinch of ground seeds was sometimes added to culinary preparations for its traditionally reported stimulating properties. A moderate food use, without therapeutic purpose. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.
Where to find it
Obtaining the plant
Black mustard seeds can be found at herbalist shops, in certain specialty food stores, and at farmers' markets; the plant can also be grown in the garden in well-drained, sunny soil.
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