OVERVIEW: People have used indigo alone or in combination with henna to dye their hair black since thousands of years.
PHYTOCONSTITUENTS: Indigotin. Indigofera tinctoria plants contain the glucosides indicant. After soaking the plants in water, enzymic hydrolysis transforms indicant into indoxyl and glucose. Indigotin (often also called indigo or indigo-blue) formation results from the grouping of two molecules of indoxyl in the presence of oxygen.
PRECAUTIONS: None known. For educational purposes only. This information has not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease.