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Biolage Scalp Sync Purifying Concentrate for All Scalp Types is a pre-shampoo, rinse-off treatment designed to exfoliate and clarify the scalp. Formulated with a concentrate of a fermented tea blend and filtered glycolic acid, this gentle yet effective treatment removes buildup, excess oil, impurities, and dead skin after just one use. Suitable for all scalp types, including oily, sensitive, dry, or dandruff-prone scalps, as well as color-treated hair, it provides a soothing and hydrating effect that lasts up to 72 hours*. This vegan formula is free from sulfates, parabens, mineral oil, silicone, and colorants, and is approved by Cruelty Free International under the Leaping Bunny Programme.