NIGHTBLUE Onion & Black Seed Shampoo designed to strengthen hair, prevents premature graying & dandruff. It increases your hair length and reduces hair fall. Red onion extracts, dark seed oil help in restoring tired scalp and thin hair. This shampoo helps in saturating the scalp and supports the roots. Many people experience dandruff due to a fungus called Malassezia furfur, so onion’s antifungal properties could definitely come in handy as a dandruff fighter.