A lot of people have given this serum a lot of grief over making their hair greasy or oily when used after washing your hair. This was my initial opinion as well, until I figured out how to properly use it. I had washed my hair one night, next day I had an extremely itchy scalp (I have very dry skin, so sometimes my scalp suffers as well) and in an effort to find relief, I broke down to use my detox hair serum. I had an event the next day, REALLY didn't want to wash hair again beforehand, so I put a tiny bit on my front hair line that is slightly thinning and was itching. YALL, gamechanger! If you only fill the dropper up about 1/5th of the way, very carefully put small amounts on your needed areas and massage into your scalp. When i say a little, i mean do about a half drop at a time and work it into your scalp. I woke up with very hydrated and healthy looking hair. It only takes a little, but it's effects are big! Softer hair, no flakiness, hair is growing back thicker and stronger! It's also great for pre treatment before your wash day as well!