Add thickness and volume to thinning hair with the BosDefense three step hair care regimen. This intensive, leave-in treatment creates thicker feeling hair and will protect your hair follicles, helping to stop the effects of DHT, which is the primary cause of hair loss. LifeXtend complex will hydrate and nourish your hair while the kelp extract protects from photo ageing, frequent washing and brush damage. Sage leaf extract stimulates healthy hair growth.