My male friend's scalp has become really thin, so he's wondering if scalp stem cell injections really work.

Since he used to have thick hair, he seems to be under a lot of stress about it.

Does anyone know of any famous places for scalp stem cell injections where the doctors are skilled?

I'm worried he might just be wasting his money, so watching him is a bit concerning, haha.

I would appreciate it if those of you who have actually tried it could honestly share your satisfaction levels, haha.

The prices seem to vary wildly, so he's curious to know which place is good.