Biotera Volumizing Shampoo gently cleanses while leaving the hair with exceptional volume and fullness. why is it different? Biotera Revitalizing Shampoo increases volume by 22%*. Its lightweight formula gently cleanses away dirt & oil without weighing the hair down as natural botanical extracts provide additional body, bounce and shine. who is it for? Biotera Volumizing Shampoo is great for volume-deprived hair.