It was a sad day after using this "Olaplex". This product did not work, but further damaged my hair... I actually slept in this product, which could have just dried out my hair? I'm not sure... but it made by hair more tangled and brittle. How?! I don't know. I have naturally dark brown hair and lightened it with manic panic about 3 months prior to using this product and had routinely used deep conditioners and coconut oil, but decided to try olaplex before going another shade lighter and that was a sad mistake. Literally had to cut off my ends as there were straw like. I've postponed re-bleaching my hair and I've been using coconut oil treatments once a week to recover from this product. Good luck!