Educational information, not medical advice — ask your doctor or midwife.
Nilini is the Ayurvedic name for the indigo plant, Indigofera tinctoria. It is a single drug (Ayurveda), also known as Indigo, and it is the plant that gives the classic blue indigo dye.
In traditional practice the leaf and the root are used. Small amounts were given for skin complaints, hair care and liver trouble. Larger amounts were given on purpose to make a person vomit or to empty the bowels.
Today it is met most often as a hair dye and as an ingredient in medicated hair oils. The internal medicine use is much less common and is meant to be handled by a trained Ayurveda doctor.
Here is the short version on evidence. No human trials of Nilini have been published, so the medical claims rest on tradition plus laboratory and animal work. A long record of traditional use is not proof that something works in people, and that point applies to everything below.
The honest answer is that no one has shown how Nilini works in the human body.
The leaf and root contain compounds that irritate the lining of the gut. That is the likely reason large doses cause vomiting and loose stools, which is exactly the effect old texts were aiming for.
In rats, leaf extracts have reduced markers of chemical liver damage and have delayed fits in seizure tests. Those are animal results only. They do not tell you what any dose will do in a person.
Dried leaf powder is the most common internal form, given in very small amounts.
Root powder and fresh leaf juice appear in older recipes, usually for gut clearing or liver complaints.
Medicated hair oils, such as Nilibhringadi taila, carry the leaf in a sesame or coconut oil base and are used on the scalp, not swallowed.
Paste made from crushed leaves is applied to the skin in folk practice. Pure indigo dye powder for hair and cloth is a cosmetic and craft product. It is not a medicine and is not meant to be eaten.
Nilini, also called Nili, appears in classical Ayurvedic writing including the Charaka Samhita, where it is grouped with the strong cleansing drugs.
The same plant carried a global dye trade for centuries, from India to Europe, long before synthetic blue dyes arrived in the late 1800s.
Its standing as a medicine sits mainly in one tradition, Ayurveda, with related folk use in Siddha and Unani practice.
Some reactions to Nilini need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Get urgent medical help if your skin or the whites of your eyes turn yellow, your urine goes dark, or you feel deeply tired and sick at the same time. These can be signs of liver injury.
Go to an emergency department if you vomit again and again and cannot keep fluids down, if there is blood in your vomit or stool, or if you feel faint, confused or your heart is racing.
See your doctor within a day or two for a rash that spreads, ongoing stomach pain, or blood sugar that keeps dropping low. Tell them you have taken Nilini and take the packet with you.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Nilini is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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