Is there a shampoo or product that will thicken up your hair?

my hair use to be super thick when i was a teen. now its starting to thin. not much, but its driving me crazy. i know the older you get the thinner your hair will get in some cases. does anyone know if there is a product that will help. cost is no issueIs there a shampoo or product that will thicken up your hair?
sure there is. Just about every kind of shampoo and conditioner lines have a thickening shampoo or serum. Just take your time and find one that works well with your hairIs there a shampoo or product that will thicken up your hair?
I use Herbal Essence the coconut one it makes my hair so thick that i want to find a thinner.... also you have to use the shampoo and the conditioner for it to works
Nixon. Its a shampoo. My friend has really thin hair and she bought it and said it worked in making her hair thicker.
Pureology Texture Twist.
Mane n' tail products will thicken your hair nicely.
rogaine

ojon