Enhance your hair health with the WOW Skin Science Onion Black Seed Hair Serum - (100ml). This nourishing hair serum contains red onion seed oil extract and black seed oil to boost blood circulation to the roots and revitalise dull, dry hair strands. The hydrating hair serum is infused with watercress extract to lock in moisture and minimise hair breakage. It is free from harmful chemicals for risk-free use.