Are there any functional shampoos that have been effective for hair loss?

These days, there are many functional products available for hair loss.

I am also using a lot of related products, but

Actually, I think it's rare to really feel if this is working.

Among the functional shampoos or care products related to hair loss that you have used, have you perhaps used any?

Is there a product that you think helped with hair loss?

If you recommend a product, I would like to try using it as well.