The third and final step in our complete hair treatment program! Vigorously massage this concentrated biotin blend into your hair after shampooing and conditioning, and reap the rewards of a head of hair that’s full of body and feels and looks great! Biotene H-24 is a complete system of hair care especially designed to help hair look and feel thicker and healthier. These highly effective products contain the finest natural ingredients scientifically combined to give hair fullness, strength, body and shine. H-24 Emulsion provides a concentrated dose of biotin to your scalp along with vitamin B3 and amino acids to provide the nutrients needed for thicker fuller-looking hair when under continuous usage for 30 days. pH Balanced.