I had a lot of hair loss on it and then my thryoid gave up the ghost thanks to lithium toxicity so I learned a good bit about it.

Centrum silver will help. Selenium and biotin supplements also helped me. I have no idea who told me about those 2; the centrum silver recommendation was from my old psychiatrist.

There are shampoos that can help. I used Nioxin and really liked it but was told by my stylist that it no longer has the ingredient (DHT I think) that helps with hair re-growth. However you can find some other shampoos for hair loss that do have DHT and I seem to have read positive reviews of the new Nioxin. I use Nioxin scalp care fo psoriasis on my scalp and it's wonderful stuff. But like I said I don't know what the new hair loss shampoo is like. You can probably get recommendations at a good salon. When I started I had patches of thinned hair along the front of my hair. Growing it out was a pain b/c my hair is curly and so I'd have these curly pieces randomly sticking up. But lots of bobby pins controlled it and now I have long hair without any thinning although my hair isn't as thick as it once was (I also am menopausal which is probably the real reason for that). But the vitamins alone helped until the thyroid issue.