For an anti-dandruff shampoo to be effective, it must contain certain important ingredients. It is the ingredients that work together to offer results. That means, no ingredient is effective on its own; it is the culmination of different ingredients that makes an anti-dandruff shampoo effective. Thankfully, the ingredients are not randomly added to the shampoo composition. Every ingredient in the shampoo is tested before it can find its place in the composition. Know all about anti dandruff shampoo ingredients here.