The art of hair dyeing was prevalent in ancient times also, but most of such dyes were simple and mostly derived from natural plant sources and were quite safe. All over the world such dyes were used liberally in those days both by men and women. With the development of the science of chemistry and its entry into the cosmetic industry in modern times, an increasing number of toxic chemicals have found place in these dyes to make them more effective and attractive without realizing their dangerous side effects.
Now there is a widespread use of different types of these hair dyes all over the world This is a serious problem of public health concern. It is estimated that more than one-third of the women over the age of 18 years and 10% of men over the age of 40 years use some type of hair dye.This is more so because now a days, there is increased incidence of premature greying of hair even…
