I did a keratin treatment at a salon that stripped my hair of color and made it look like the first picture. I bawled my eyes out but was told itbwas easy fix and I tried everything since I was told there was too much protein in my hair. I tried coconut oil, masks, hydrating serums for about 6 weeks and nothing helped. So, I took a chance because I had done a Keratin Research treatment before (a year ago) with really good results and read that it could help with the sad condition of my hair. I colored it dark, waited a week, and then did the Keratin Research treatment. The second picture is what it looks like now. And that was air-dried. It literally went from the first picture to the second picture overnight and I finally stopped crying after 6 weeks. This product is absolutely worth it. Do it yourself. Do it today. It's amazing.

Good deal and perfect product i use every time for client and me so happy

I am absolutely in love with this product. This is my second time buying this keratin treatment by Keratin Research. I first bought the product that was listed in English. This seems to be exactly the same.

I didn't buy the clarifying shampoo. I just use Renpure's Biotin shampoo twice. The process takes at least two hours and I have thin, frizzy, wavy hair. My hair was constantly frizzy and a mess. Nothing seemed to help without using heating tools. This keeps my hair luscious, shiny, and brings out the color for around three months. It slowly seems to get frizzy after that.

After I process my hair, I don't wash it for three days and I straighten it each day, despite it being the Express version.
I was able to get three treatments out of one bottle, so it's VERY cost effective.
It does produce a chemical burning smell that makes my eyes water during the straightening process since it has formaldehyde. BUT the results are worth it!!! I had fully straight hair for a month, but the frizz stayed away and I had beautiful wavy hair for at least 3 months. I absolutely recommend this product.

I had really dried , fine, curly hair with lots of split and dead ends and could never wear it curly because of all the frizz and any styling product would weight it down. I was really tired of that big, puffy , impossible mess on my head . I followed the instructions that came in the package together with the bottle , the whole process took me several hours, mostly bc I had to stop multiple times to attend my toddler daughter or because I needed some air. So I started by washing hair twice with clarifying shampoo, then blow dried my hair, applied the solution (don't let the solution touch your scalp , it burns), used the fine tooth comb to take the excess of product out of hair , waited between 20-30 minutes before blow drying hair again but this time with the product still on hair. Blow dried and then straighten the hair. Hair is going to be super sticky after blow drying and your brush and comb will look disgusting. If after you're done straightening your hair still looks sticky you probably need to keep straightening until your hair looks nice and silky. I was hesitating , I didn't know if leaving it for the full three days or if washing it before that and keep my curls or at least some waves. I washed it 36 hours later with sulfate free shampoo, I thought my hair would look like nice and curly with looser curls or at least wavy ,but nope in those 36 hours my hair went from 3b to plain 1 with some 2a waves on the lower back of my head, and I'm totally fine with it now I won't have to style my hair unless I'm going out to somewhere special , glad I didn't wait the full three days or my hair would have turned out to be too straight and with no volume. Now I'm going to need to buy a new shampoo and conditioner because the ones I've been using make my new straight hair too oily

I love love love this product. I've been using it on my hair for about 2 years now, and I only wish I had found it sooner! It does burn your eyes a little, and you definitely need to wear gloves when applying. But this is like a miracle treatment for curly hair! I'm white and have naturally curly 3B curls that are very frizzy. My hair would typically take about an hour to blow dry and strighten, and then would frizz up or curl on the edges in humidity. This makes my hair perfectly smooth- it looks naturally straight. Since it takes much less heat to straighten, I've noticed I'm able to grow my hair longer when I use this product vs when I don't use it and my hair breaks off all the time.

Make sure you follow the instructions carefully. I shampoo with clarifying shampoo 3x (until my hair feels like straw lol). Then blow dry. Comb the product through being careful to saturate each strand. Then let it sit ~20 minutes, blow dry again, and then do the flat ironing. It's important to go over each strand several times (until it stops fuming) on the highest heat (450 F). Make sure to use SULFATE FREE shampoo! Using shampoo with sulfates will rinse this right out of your hair and you'll be curly again! Lasts about 2 months, maybe 3 if you can get away with washing less frequently.