A gentle pre-shampoo treatment that exfoliates, soothes, and hydrates in one step! Biolage Scalp Sync Purifying Scalp Concentrate is a gentle pre-shampoo treatment that exfoliates and clarifies the scalp of buildup, excess oil, impurities, and dead skin cells after just one use. Infused with glycolic acid and fermented tea, this pre-shampoo is ideal for all scalp types. BENEFITS: A gentle pre-shampoo treatment that exfoliates and clarifies the scalp of buildup, excess oil, impurities, and dead skin cells after just one use. Hair and scalp are refreshed, hydrated, and revitalized. Infused with glycolic acid and fermented tea. Ideal for all scalp types (dry, sensitive, dandruff-prone, and oily). Sulfate-free, paraben-free, and silicone-free. Mineral oil-free.