OGX Thick & Full + Biotin & Collagen Volumizing Shampoo for Thin Hair
Reviewers rave that OGX Thick & Full + Biotin & Collagen Volumizing Shampoo for Thin Hair ($6) is a must-have for those with flat, thin strands. It's infused with vitamin B7, biotin and collagen — all of which work together to strengthen your locks and add volume and thickness.