Bosley Bos Defense Professional Strength Thickening (U) 200Ml Hair Treatment A thickening & volumizing hair treatment.Contains LifeXtend complex featuring Algae Extract to reduce D.H.T that causes thinning hair.Blended with Biotinyl-GHK to protect & repair hair follicles.Loaded with Saw Palmetto Extract to improve follicle health.Infused with Soy Amino Acids to restore strength, thickness & volume.Hair appears fuller & bodified.To use: Apply evenly to scalp & hair. No need to rinse. May cause temporary redness.