Wow Skin Science Red Onion Black Seed Hair Serum 100ml is used for managing dull, breakage-prone hair by providing strength and shine. It is a water-based, shine-enhancing formula enriched with red onion seed oil, black seed oil and watercress extract. The serum hydrates dry strands, smooths rough cuticles and makes hair glossy. It also helps form a protective barrier around the hair to manage breakage, making hair more manageable. Additionally, it helps shield your hair from UV damage and adds glossiness. The serum effectively fights frizz, helping smooth out flyaway hair and leaving you with sleek, shiny strands that are protected and hydrated.