After some research for a natural hair colour, I started using tints of nature after coming out in an inflamed eczema across my neck/ hairline. After use, experienced a little irration, but nothing compared to using my previous supermarket chemical hair colour. Rapt with the natural ingredients, great it has organic ingredients, esp love the comfrey. Tints of nature has no chemical smell, has a long lasting colour. Have used 3 times now, plan to keep using this product. Happy to recommend.