BIOTIN BOOST THICKENING CONDITIONER with Biotin, Collagen & Coffee Tri-level Thickening Complex Volumize Strengthen Fortify Free of: sulfates, parabens, phthalates, gluten, drying alcohol and artificial colors. Give fine, flat strands the boost they crave. This conditioner helps promote thicker-looking hair with biotin for volume, collagen for strength, and coffee to help boost strands. Gently detangles to leave hair feeling soft and manageable. Achieving thicker-looking hair just got a whole lot easier!.