Hi Anna
I'm sorry I can't advise or anything but just to say I will be following your thread.
And to sympathise and relate

I'm 61, and already had fine hair to start with but since perimenopause I've thinned, in fact in certain overhead lights you can really see my scalp on top which is depressing!

I'm thinning in the classic female pattern, mostly top front and both temple areas.
I wear my hair fairly long and curly so it DOES hide it mostly, but I can really tell a difference myself. My hair, which I only wash every 5-6 days comes out in a handful every time.
What are your iron levels like Anna?'
I ask because 2 years ago I was quite badly anaemic and I read that low iron can cause thinning, but yes, like you Id read about low oestrogen too.
Its a fine balancing tightrope with oestrogen for me as I am going through some drama with my HRT * big sigh * and I don't want to use a lot of oestrogen right now.
I'd be interested in your answers anyway

Take care, and happy to chat about it, if it helps!