Please recommend a hair loss shampoo.

I am using hair loss shampoo, but I don't find it very effective.

I can't see it.

Which one should I use to be effective?

There may be individual differences, but...

My bangs are all sparse now, so I feel really downㅠㅠ

My older sister said she's getting an injection at the dermatology clinic.

I'm also 고민중이네요.

Please recommend some hair loss shampoos.