I put two pumps in at first because I have alot/long hair. The first 8 hours, my hair had that "wet/greasy" look at the end - USER ERROR! BUT! After the first 8 hours, WOW! My hair LOOKED stronger, healthier and was oh-so soft! I will only use 1 pump now going forward even with my massive amount if hair. It smells really good, and best of all no chemicals. This is my new favorite hair serum...I've tried alot and seems some will leave your hair more dried out after time, this one truly does moisturize and give your hair shimmer/shine. It's like having the pantene hair look with REAL results and without the garbage.