The use of onion hair shampoo for dandruff is always a good idea. The best onion shampoo contains keratin from plants and ginger, which locks in moisture on the scalp to prevent dandruff and dryness. You should choose a safe and natural onion hair shampoo that does not contain any harmful chemicals so you could get the best results from these ingredients. You may thus opt for WishCare Onion hair Shampoo with Onion and Ginger for Hair Fall Control that is safe, gentle, and made of natural ingredients making it the best onion shampoo for dandruff treatment.