Redken's Extreme Length Shampoo with biotin strengthens damaged hair and helps hair to grow longer and stronger. Extreme Length Shampoo helps prevent breakage to promote your strongest, healthiest hair. When using Extreme Length's full sytem of shampoo, conditioner and sealer, you can help your hair to have up to a 81% decrease in breakage and up to a 92% reduction of split ends visually.

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