Medical Definition of Henna

Henna: A coloring made from the leaves of the Egyptian privet, Lawsonia inermis. Approved only for use as a hair dye, not for direct application to the skin, as in the body-decorating process known as mehndi. This unapproved use of a color additive to henna makes these products adulterated and therefore illegal. Injuries to the skin can result from products marketed as henna.

QUESTION

What causes tooth decay? See Answer

Health Solutions From Our Sponsors

Last Editorial Review: 9/7/2018