It was very fast. I mean its like I got my haircut, after 2 months I went again and barber said your sides are thinned too much. After 4 months I started noticing my crown area. But it was like 3 years ago. And I think I am still shedding too much. Not like 3 years ago ofc. I don't remember a moment when I didn't think about my hair after barber said that...Like I said, there is also chronical telogen effluvium with does not last 6 month but way more. Did your hair start to thin gradualy at the same pace over time or it was fast?
@Suswang Reference range is 25-80 ng/mL for optimal and I had 24.07 ng/mL last year. But I used something which I don't remember it's name and after 1 month it become 67ng/mL so it is not the problem probably.