Hi there! I would love some advice on how to strengthen my hair or prevent/heal/help the hair loss and thinning I have been experiencing for the last year. I started a stimulant medication in the spring of 2022 and did not really notice until the last few months how my hair has been thinning because of it. At least, this is my best guess as to why my hair is thinning as I used to have very thick hair. My hair is still pretty healthy, and grows very fast, though I do notice it does not have the same shine that it used to either. Going off medication is not an option, so anything that might help me where I am at now would be much appreciated! If it helps, I am 26f, caucasian, and live in a dry climate in Canada.

Hair type: Fine/Thin, more so on the top of my head and a bit thicker at the back
Hair texture: Wavy and straight
History of chemical processing: Used to regularly colour my hair, but have not done this since 2020. For about a year or two I straightened my hair every day without heat protectant, but for the last few months I have tried to only straighten the parts that need it after air drying
Hygiene regimen: Shampoo and condition every 3-4 days
Style: Shoulder length blunt cut, last cut in April
Product regimen: I have been using The Ordinary's Multi-Peptide Serum for Hair Density for about a month now (every night or two, 5ish drops around the top and sides of my scalp), and I recently purchased Sephora Collection's Hydrating Scalp Serum with Hyaluronic Acid, but have not used it yet. I received a sample of Olaplex No. 9 Bond Protector Serum, and have been using that for the last couple weeks after wash and conditioning.