information about all shampoos

The shampoos are specifically used for the washing of head hair of humans. But there are a lot of shampoos for washing the animal’s hair too. Some shampoos contained of some chemical for washing the hair. But some companies claiming that they use the natural ingredients like egg protein and herbs. But all the shampoo must contain some of the quantity of chemical I can bet this. Still humans are using these products for their hair on a larger scale.