Ive been using Garnier Nutrisse 5.3 for a couple of years and since then I've started to loose hair and the last time I used it I got scalp irritation and severe hair loss. I've used a magnifying glass to read the content small prints and found that it contained PPD ( p-Phenylenediamine) a compound which is banned in many countries in Europe but not in the U.K. It causes severe reactions and hair loss if the company changes the concentration without indicating that within the content. Applying a test behind the ear won't show the effect of this dye on hair loss, be aware.