I had very oily hair for years and washed it every day. Bad. It is very dry now, as a result. Dermatologist told me to also take biotin and Magnesium - both are very good for hair. Hairdresser also told me it is not good to wash it frequently, as we're stripping the natural oils. I now wash it 2x a week - sometimes 3x. I put a conditioning rinse on it when I shower and that helps to make it manageable, but it does not make it greasy. Both dermatologist and hairdresser said NOT to wash daily. I've tried just about every shampoo there is, expensive and cheap, and none seems to work better or worse. The biotin, magnesium and general diet do help, though. Along with thorough brushing with a good brush. I love the Mason Pearson brush from Engloand and have used it for years.