Hi Charlie62, welcome (I recently joined myself). I also take Thyroxine and on HRT - Everol sequi. For a number of years I have been losing alot of hair & hair looked in poor condition (so much so I hopped my long hair into a bob, also helped re less sweaty around neck area). Since January I have reassessed my diet generally and eating much healthier, greatly cut back on sugar (I have a sweet tooth), I have one day a week where I allow myself to have something sweet. The menopause chef is quite helpful for diet advice as is this forum/website. I have added flaxseed to my diet and seeds, my nails are in amazing condition and my hair is so much better (still losing some hair but OH doesn't need to use sticky roll to lift hair off my pillow anymore). Over the years I have tried various 'thickening' shampoos, not sure for the money whether they are worth it but I've been using Bumble & Bumble thickening shampoo (look out for when they have offers).
I also started on AD before started on HRT (GP contacted gynae specialist for advice before prescribing HRT), I have felt a definite improvement in my mood/energy levels. I hope you start to feel some improvement soon.