Healthy Hair Follicle Nourisher primes the scalp, helping amplify the effect of other treatments. Prime the scalp prior to using thinning hair treatments with Bosley Professional Strength Healthy Hair Follicle Nourisher. This intensive leave-in primer not only preps the scalp for better absorption, but amplifies the effects of treatments while inhibiting toxins such as D.H.T. LifeXtend Complex contains, Lupine Protein, Tri-Peptides and Sugars designed to help promote thicker, fuller-looking hair. Saw Palmetto Extract to help promote healthy follicles.