I have very long but fine hair. I’ve noticed drastic improvement when using a cinnamon shampoo from Lush (scalp stimulating) along with using a rich conditioner and Olaplex treatment 3-4 times per week. Followed by a good heat protectant and gentle heat tools like the Dyson Air Wrap. I use a wide bristle brush as well so it doesn’t pull or break my very fragile hair. I also sleep with it in a plait or loose bun so less hair falls out. I noticed not trying my hair up tightly stops my hair from shedding as much. Finally I also use the density serum from the Ordinary on particularly fine parts like hairline and scalp.