People With Damaged Hair Are Raving About This Bonding Shampoo for Smoothing Strands

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Whether you bleach, blow dry, heat style, or simply rub your strands too harshly, hair damage is inevitable regardless of your hair thickness. Of course, fine hair might be more prone to damage than thicker strands due to their weaker cortex (think of it as the tree trunk within your hair cuticles), so it's all the more important for these hair types to be cared for with bonding repairing treatments.

One bonding shampoo that shoppers with damaged, frizzy hair said finally gave them super soft tresses again is Redken's Acidic Bonding Concentrate Shampoo, and the Leave-In Treatment from the same collection is already one of InStyle's picks for the best bond-building hair products. "If you have damaged hair you really need this," said one Amazon reviewer, who added, "It has transformed my hair after just one use. My hair is not dry, frizzy, I don't see the breakage that is sticking up on the top and side of my hair… So happy my hair is shiny and soft again."

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Shop now: $12–$90, amazon.com

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Shop now: $12–$30, amazon.com

A sulfate-free option, Redken's Acidic Bonding Concentrate Shampoo has a super-concentrated formula that is made with citric acid to re-balance your hair's pH levels. Since a lot of hair damage stems from bleaching and coloring, the shampoo also protects your color from fading while repairing any split ends. The brand strongly recommends following the shampoo with its related conditioner, a routine that reviewers say retains color and smoothes out damage. "I'm drying my hair as usual and see and feel a difference in the texture of my hair," said a shopper after using the set. "The damage is less noticeable. My color is also being held better than normal."

It's not just internet reviewers who love Redken's bonding treatment, though: Celebrity hairstylists like Laini Reeves also trust it, with Reeves using the Acidic Bonding Concentrate Shampoo, Conditioner, and Leave-In Treatment on Emily Blunt's hair for the 2021 Met Gala. According to the brand, Blunt had recently refreshed her hair color so her strands needed more care for washing and conditioning. The concentrated formulas of the shampoo and conditioner were "perfect for her hair to help strengthen strands and protect her new color," and Reeves added the Acidic Perfecting Concentrate Leave-In Treatment for "extra conditioning and to add smoothness to strands," according to Redken.

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Shop now: $12–$30, amazon.com

If your hair is looking more brittle lately and is in need of some extra TLC as the weather gets even drier and colder, get Redken's Acidic Bonding Concentrate collection now. You'll find on Amazon the shampoo, conditioner, and leave-in treatment starting at $12, and see more beauty must-buys here.