yeah there's a shampoo that thickens your hair.
I saw it at the hair salon. becuase my mom's hair is thinning too.

but keep in mind people loose lots of hair normally.

I loose ALOT of hair too... like...
from washing/blow drying my hair I can loose as much as like 20 - 30 strands...
its creepy when i look at it.
but i don't see a difference as far as thinning.