I am 45 have have been tested for thyroid, etc. by my doctor. Seen a derm, she did a hair count but had no answer/it was some what normal. Suggested a scalp biopsy, but I don't think that will tell me much. How do you accept middle age hair thinning. I look very young except for this. Used to color my hair on my own, but my guy suggested using semi-perm ... it's costing me a fortune now with not great results. Anyone use Clairol Natural Instincts?? He suggested No Ammonia. I'm 50% grey he says but I think only 35%. thoughts?