100% natural henna will only dye the hair in reddish tones – copper, auburn, chestnut - depending on your current hair colour. Other herbal powders such as indigo, cassia and amla need to be added to henna to create brunette shades.
Henna is a safe and natural alternative to commercial hair dyes. These contain chemicals which penetrate the hair shaft , risking damage to the hair structure. With repeated use, hair tends to become dry and brittle with the possibility of hair breakage and hair loss.
Many commercial hair dyes contain Para-phenylenediamine (PPD) - a chemical which has been shown to cause severe skin reaction s in some people such as blistering, itchiness, swelling rashes and scalp sores. It has also been known to trigger asthma and other respiratory/allergical conditions.
PPD is a toxin which is absorbed through the skin into the bloodstream where it collects in the liver. With continued use it may cause damage to the internal organs. It is no surprise that for many years PPD has been a suspected carcinogen.
Natural henna is commonly recommended for hair colouring during pregnancy.