Biolage Scalp Sync Oil Balancing Purifying Serum, powered by fermented tea, absorbs excess oil and helps prevent sebum buildup, keeping your scalp fresh and balanced for up to 48 hours. It reduces oil between washes, prevents oil from traveling down the hair strand, and promotes a refreshed scalp and hair. Suitable for all hair types, including color-treated hair. This vegan formula is free from parabens, mineral oil, silicones, and colorants.