Tip: Bump up how often you shampoo — dandruff can be resolved when you have a clean scalp. Many treatment shampoos recommend lathering up twice a week (at the least), but Phillips says the more often you do it, the better.
"Frequent (daily) shampooing is a big statement and obviously depends on the individual. You can't let the hair dictate how you're treating the scalp, and that's frequently what happens," she explained. "We say: 'I can't wash because my hair doesn't need it, or because it will dry it out, or I have to blow dry.' There are a lot of ways you can do all of that with both hair integrity and scalp condition in mind."
For serious sufferers: Glytone by Ducray Kertyol PSO Shampoo ($28)