Like it's name suggests, hair thickening shampoo is a shampoo which thickens hair. This is not to be confused with hair loss shampoo as hair thickeners are not a treatment for alopecia and other hair loss conditions. A recent question on yahoo answers provided some good suggestions on hair thickening shampoo products:
I'm looking for a good shampoo that will make my hair more voluminous and thicken the hairs that are in my head already. I'm not looking for any shampoos that contain hair-loss inhibiting or hair regrowth drugs... just something that will make the hair thicker and stronger. Anyone have suggestions?
Several readers recommended Thicken Up. One user said "I love the Thicken Up product. Theres nothing out there that will permanently change the thickness of your hair, but using the right products will strengthen your hair, making it easier to add volume ."
If you are looking for a way to thicken your hair and add volume, Thicken Up may be a good choice for you. You can buy it on Amazon here.
I think hair plus combo would be a good choice. As you expect it does not have any hair loss inhibiting or regrowth drugs but still helps in increasing the thickness and also gives shine to them.