Women in the know are switching to the GK Hair Taming System with Juvexin to maintain smooth, lustrous hair for months at a time. And the GK Hair Taming System is available at Henry James Salon for $179 – all year long. Summer is the perfect time to apply the most effective hair taming system available that lasts up to 5 months, depending on your hair texture. The GK Hair Taming System contains Juvexin, a form of non-hydrolyzed keratin found in hair that helps combat the effects of humidity, minimizes frizz and increases smoothness and luster.