Are hair colourant allergies common?
No, they are very rare. Many people can be allergic to a vast number of substances, including foods and natural products. On the contrary, reactions to hair colourants remain extremely rare. These reactions can occur for a very small number of people especially if they have previously had a temporary tattoo, such as a “black henna” tattoo. These potential reactions can be detected by carrying out the skin allergy test, as directed, 48 hours before you wish to use the product, each and every time. This is why you should buy the product in advance of when you wish to colour your hair. Please click here to see how to perform a skin allergy test.
