Thicker Fuller Hair Naturally. Natural scalp massage emulsion with Biotin Phase III. 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.