I doesn´t see any difference in my hair after one full bottle. It smells good, it´s not irritant, it has good ingredients but it doesn´t work for me. My scalp is oily, hair is dry, very thin, and very processed. I dyed my hair every 3 or 4 weeks, and bleached it 2 or 3 times a year since 15 years. Maybe I need something stronger! I don´t discard this tonic essence as a bad product because I have a very, very difficult and coarse, and my scalp is really damage, but I will not repurchase it