The Original formula for the Simply Smooth Keratin Collection is a gentle botanically based formaldehyde free, keratin 'smoothing' system that will leave your hair looking and feeling beautifully healthy, strong, smooth with an incredible ongoing glossy shine, smoothing and reducing the curl texture from 25% up to 50% and will last from 12 to 16+ weeks if maintained with the recommended Simply Smooth maintenance products. These will continue to boost the keratin levels within the hairs structure. (see the before and after photos!) Apple pulp has been incorporated within the formula for the added moisturizing and healing properties, enriched with vitamins A to improve elasticity, vitamin E and D to protect from free-radicals and shield against pollutants within the environment Simply Smooth may be repeated as often as every 4 weeks, however, 12-16 weeks is recommended. Simply Smooth may be used over all chemically treated hair including color, bleached hi-lights, relaxers and other Brazilian Keratin Treatments.