I'm worried about hair loss.

I used to have a lot of hair in the past, so everyone would say I had thick hair, and when I went to the hair salon, they would compare my hair volume. But at some point, I started losing a lot of hair, and I noticed that the part on the crown of my head shows more white scalp than before. I heard that changing the parting line to a different spot can reduce hair loss, so I tried that, but I’m not sure if it actually helps reduce hair loss. Currently, I am taking biotin, which is said to be good for hair loss, and I think my hair is falling out less, but I still see a lot of white scalp in the parting line. Is there any way to address this?