1 serum, endless benefits. This first of it’s kind powerful serum for frizzy hair was expertly formulated over 30 years ago with a unique blend of silicones. Hair serum helps protect dehydrated strands against the onset of frizz. With silk proteins and algae extract, this anti-frizz hair serum smoothes hair and boosts shine for more manageable lustrous results. Expertly formulated for medium thick and wavy curly hair types, but suitable for all levels of frizz. One of these iconic serums is sold every minute in the US.