Hair care with hair tonic

As I get older, I've been losing a lot of hair lately, so I started managing it with a hair tonic. The shampoo is good, but I felt that just using it briefly wouldn't be enough, so I've been spraying a scalp serum whenever I have a spare moment. I usually hesitate to use products like this because I'm worried they might make my hair greasy, but this one has a refreshing texture, so I can manage it by spraying it frequently.