I like to use organic shampoos that thicken your hair, and I have found that certain key ingredients help to achieve these results. I have also found that though most natural shampoos are great for your hair, there are different formulas for different hair types, so you will want to find a formula that makes your hair full and bouncy.
Nut oils and shea butter are great for adding depth and volume to your hair. These natural ingredients to not weigh down hair like petroleum based oils do. They are also great for moisturizing your hair, which also adds volume.
Natural shampoos that are labeled for fullness and body are also the best for your hair if you want a thickening effect. These formulas contain ingredients like biotin that softens hair while adding full body to it.