I'm guessing from the products you've been trying that maybe you're in France? I also tried the Kerastase Aminexil - very expensive stuff. I don't know if it helped or not with fibrosis, but it made my hair very dry and it started breaking close to the scalp. I never found that to be the case with Dercos Amenixil, so I wonder what is different between the two ... besides the price (Dercos is much less expensive).
Have you ever tried Ducray's Anastim? It has the Procapil ingredient ... I used it when my hair loss first began a few years ago, but I wasn't consistent. My hair still looked pretty good at the time and I hated using these treatments before getting into bed. Such a mess. Maybe I should have given it more time.
Your hair loss sounds similar to mine. Diffuse and maybe most people would not notice at a glance that my hair has thinned, but of course it has. Have you ever tried lasers ... LLLT therapy? I know the Revage 670 machine is popular in Europe and has some impressive photos on their website.
Also, have you tried any of the Phyto products? There's a new one with apple stem cells. It smells like one of their old revitalizing products ... like celery. I'm using it at the moment ... in combo with a laser program I began at a local salon almost 2 months ago. I think I might be seeing some new growth. Although I hate to say it because it always feels like a jinx ...
Definitely less shedding, so that's good news.
Sorry for all the questions ... just curious since it sounds like you've used a lot of the same products I have.