OGX Thick & Full Biotin & Collagen Shampoo A tiny, dime-sized amount of the OGX Thick & Full Biotin & Collagen Shampoo ($6) will quickly transform into the thickest and most moisture-rich lather that'll leave your hair with a beautiful boost of volume and moisture. It's also formulated with strengthening ingredients like hydrolyzed wheat protein and vitamin B7 to help promote healthy hair growth and length retention. Image Source: target.com OGX Thick & Full Biotin & Collagen Shampoo $6 from target.com Buy Now