I have a client who is 4 years post cancer her hair has grown back very grey and thin and dull and she’s most insistent she doesn’t want it colouring. I have suggested a we put a clear gloss on to thicken the hair shaft and give a nice shine. She would like it to be permanent so I’ve chosen well Innosense clear 0/0 for two reasons it’s permanent and I felt it would be gentler on her hair and scalp seeing as she’s had no chemicals on it since her regrow. However on reflection after reading about it on the internet this is a clear toner to reduce the I tesity of a colour. Please could anyone advise me about this product ?