Instrumentation testing showed results starting with the very first application. From your first use, Strand Serum helps reduce breakage and split ends while delivering up to 72 hours of frizz reduction for smoother, more manageable hair.

In a consumer perception study, after 1 week, women with chemically treated, dyed/color-treated, or chemically straightened hair reported that their hair felt silkier and smoother.

After 2 weeks (5 uses on both damp and dry hair), you'll see even greater improvements, including an 83% reduction in breakage. Hair feels softer, looks shinier and healthier, with an overall improvement in hair quality.