GK Hair, The Best Hair Treatment, a smoothing formula developed for frizzy and damaged hair. It works on all types of hair and boosts shine and nourishment to your hair. How does this hair smoothing treatment work? The formula is applied after your hair is deep cleansed with a clarifying shampoo and is sealed with a flat-iron or a blow dryer. Regarded as the best keratin treatment; this treatment lasts up to 4-6 months, and cuts the styling time in half. It is easy to apply and has earned the status of safe-to-use keratin treatment at home. Make sure to follow the instructions for the application of this Keratin Hair Treatment and follow up with GK Hair aftercare products to prolong the results.