I have pin, straight, straggly hair..yet, somehow it will frizz. Why you ask? Even my top-notch stylist is mystified! All I can say is Miracle 10 is a miracle. It gives me a smoother blow-out, and I don't have to use any root lifter, or volumizer to get lift at the crown- for the first time in 30 years. Now, it doesn't totally prevent frizz, BUT, it helps! I have the Miracle 10 for blondes, and it actually has made my hair blonder. I didn't tell my boyfriend I was using it, after a month, he was like, "Did you get your hair highlighted today?" What can I say, the guy's perceptive. I recommend you try this!