Why it's great: Reviewers agree that a little of this product goes a long way. One reader explains, "This is one of those products that doesn't sound like you need it along with your other styling products, but you should. If I happen to run out of this, I can instantly feel the difference in my hair. It makes it nice and soft, shiny, bouncy, and full. Something I don't get from using just mousse or another serum. I have hair to the middle of my back and a dime size amount is all I need. I've been using this for years now and I still love it."
*At time of publication
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SEE NEXT PAGE: No. 3: Pureology Essential Repair Instant Repair, $25.99