No previous reaction to hair colourings: should I still carry out the sensitivity test?
Yes, you should always carry out the sensitivity test before using hair colouring products, even if you have never previously experienced reactions to hair colouring.
Your sensitivity evolves over time, meaning you gain or loose sensitivity.
With time, you could have developed sensitivity to ingredients or substances found in the hair colouring product your wish to apply.
Garnier’s hair colours are designed to be gentle with your hair and your skin, but some people can develop allergic reactions to certain ingredients or substances.