Educational information, not medical advice — ask your doctor or midwife.
Yellow dye root is the thick underground root of Cochlospermum tinctorium, a small savanna shrub. In Hausa it is called rawaya. The root yields a strong yellow dye and is also used as a folk medicine.
In West Africa it is best known as a remedy for jaundice (yellow skin and eyes), fever and stomach upsets. Healers in Nigeria, Mali, Burkina Faso and Senegal have used it for generations. The same root colours cloth, leather and food.
Here is the honest verdict on evidence. There are no good human trials of this root for any illness. Nearly all the research sits in test tubes and in rodents.
Long traditional use tells you a plant is familiar and easy to find. It does not tell you that the plant works, and it does not tell you that it is safe. That point applies to everything on this page and is not repeated below.
The biggest practical risk is not the root itself. It is using it for jaundice or fever instead of getting a proper diagnosis. Both can signal serious illness, such as hepatitis or malaria.
No one has shown how this root works in a human body.
In rodents given liver poisons, root extracts lowered some markers of liver damage. That is animal work. It does not show that the root protects a human liver.
In test tubes, extracts slow the growth of malaria parasites and some bacteria. The strength used in a dish is not what reaches your blood after you drink a tea.
Lab studies also report antioxidant and anti-inflammatory activity. Many such findings fade or vanish when tested in people.
The bright yellow colour comes from plant pigments. Colour is not evidence of a medical effect.
Dried root is the usual form. It is sold in pieces, bundles or as a coarse powder in West African markets.
Other forms you may meet:
A water decoction, made by boiling the root. This is the most common traditional preparation.
A cold water infusion or maceration, where root sits in water.
A powder stirred into food, porridge or sauce.
A dye paste for cloth, leather and food colouring.
A minor ingredient in mixed herbal blends and some capsule products sold online.
There is no agreed strength or standard extract. Two packets of the same name can differ a lot.
Yellow dye root has a long record in West African savanna countries. It was dug in the dry season, dried and sold in local markets.
Its first fame was as a dye. Dyers used the root to colour cloth, leather and foods a deep yellow.
Healers used it for a wide range of complaints. Records from Mali, Nigeria, Burkina Faso and Senegal list jaundice, fever, stomach pain and wounds.
Research institutes in Mali and Burkina Faso studied the root through the late twentieth century. That work was mostly chemical and animal based.
Heavy root digging has put pressure on wild plants in some areas. Conservation groups have raised concern about supply.
None of this history is a reason to treat yourself with it.
Stop and see a doctor the same day if you notice any of these:
Yellow eyes or skin, or dark brown urine.
Pale stools, or pain in the upper right side of your belly.
Fever with chills, sweats or confusion, especially after travel.
Vomiting that will not stop, or blood in your vomit or stool.
A spreading rash, swelling of the face or lips, or trouble breathing. Call emergency services for these.
Tell the doctor exactly what you took and show the packet if you have it.
In the United States, the UK and the EU it is not approved as a medicine. It is not a licensed herbal product and is not a common supplement.
In West African countries it is sold freely as a market plant and dye. National rules on herbal sellers vary.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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