Currently I'm using L'Oreal Serie Expert Density Advanced 500ml (around RM70) not sure if other salon has 250ml on their rack.I suffered from hair thinning too,on top and left side on the back of my head. Now after using this Loreal shampoo there's less hair fall after shower.However the growth isn't improved very much since I'm on medication but bald spots are less noticeable now.The hair texture is denser too. 

My friend suggested Schwarzkopf Bonacure Hair growth he bought online,swore that shampoo makes his hair looks fuller. I haven't tried it but this Loreal ok la. Not very foamy easy to rinse the only thing I dislike, the fragrance is little bit girly,smells like baby powder with hint of lavender. It can last for hours lol