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iStraight Keratin Frequently Asked Questions Q: What is iStraight Keratin? A: iStraight Keratin is an advanced keratin treatment (professional salon service) that reduces curls, smooths out waves, and helps eliminate frizz. Because it is a treatment, iStraight Keratin is safe to use on all types of hair and actually more effective on hair that has color, highlights, bleach, and…