I'm worried about my thin hair.

Hi, I'm really worried because my hair is thin and sparse.

So I'm looking for a scalp care product that thickens thin hair and makes it look fuller, but it's harder than I thought.

I don't expect immediate results, so I plan to use this for a long time. I would appreciate your recommendations on which product would be best. I'm so stressed about my hair, and there are so many scalp care products out there that I'm not sure which one to use.

I find products that are too expensive a bit of a burden, so please recommend some Olive Young items or share any recommendations from people who have seen some improvement after using this product.