The restorative effect on damaged hair is remarkable and even obvious, the hair is shiny and much more smooth and soft. The trick is to put a minimum of product to the palm of your hand (one drop), rubbing their hands and spread through hair (preferably wet). If you see that the effect is not "perfect", put a little more next time, until you come across the perfect mix for your hair type and length. Without that, it's plastron effect guaranteed.
In summary, product that does what it claims to do, repair tips, relaxes frizz and gives hair a smooth and shiny appearance. Its dosage remains delicate because very dependent on the volume of the hair to be treated, and thus a "standard" dose is necessarily inappropriate. Provide a gradual adjustment (2 or 3 applications) to find your dose.