Keratin ResearchINVERTO 60 Treatment for BLONDE HAIR Formaldehyde Free Hair Treatment Super Fast Application Process includes Starter kit Results are Instant healthy Shiny Beautiful hair

Bought this ages ago, was too scared to use it in case all my hair fell out. Eventually plucked up the courage to try it 2 days ago - OMG!! My hair is smooth and straight and has a lovely ashy colour - no brassy blonde for me any more. Will be interested to see how long it lasts, I've not washed it yet. It is a bit painful to use as the clarifying shampoo and the product make your hair very knotty and difficult to comb through but it is worth it. Smells quite nice on your hair once dried and doesn't leave you with a bad hair week like salon treatments.

I was looking for an at home cheaper alternative to s $350 Brazilian blowout. My hair is naturally wavy which means dry and FRIZZY. If you invest the couple hours required it definitely works. I would recommend don't be stingy! Use the whole bottle to saturate the ends as well as the scalp for best results. Use a GOOD moisturizing shampoo/conditioner to make it even better (I use Joico moisture). Used about 6 weeks ago and still very happy! I will buy again

Was für ein wahnsinns Produkt,Man hat danach neues Haar. Glänzt schöne struktur.Nach dem Haarbad, einfach Luft trocknen.Kein stylen mehr.

This product did not do anything but waste my time

I do not recommend this product. Do not waste your money.My daughter has wavy hair. I follow the instructions step by step to accomplish straight hair and left her hair straight for three days until washing off. The result was non. Her hair is back to normal with the same waves she had before. It’s awful as i feel i wasted my money, £40 wasted.