I have experienced this in my young adult life (but I'm not that old) there are at least 30 years. I had a few films and I had been advised. I quickly adopted this challenging and it is true, to the strong smell, but not necessarily unpleasant. For me it is an effective product, which well tones the hair and gives them a nice appearance. I would say that the pub at the time was very close to reality And thirty years later, I still use it regularly.