








✨ Unlock salon-sleek hair that lasts for months—because your time deserves luxury! 💼
KERATIN RESEARCH 4x 120ml Complex is a professional-grade Brazilian keratin hair treatment enriched with Argan and Coconut oils, designed to deliver long-lasting (4-6 months) frizz control, intense hydration, and salon-quality shine. Its express formula allows washing out after 8-12 hours, saving time while strengthening and smoothing coarse, curly, or damaged hair. The kit includes a clarifying shampoo, moisturizing shampoo, and conditioner, providing a complete, cost-effective hair care solution for both home and salon use.











| ASIN | B09RP2VZVS |
| ASIN | B09RP2VZVS |
| Best Sellers Rank | #60,944 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #34 in Chemical Hair Straighteners |
| Brand Name | KERATIN RESEARCH |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,027) |
| Hair Type | Coarse, Frizzy, Curly, Chemically Treated, Damaged |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 24 Ounces |
| Item model number | GLVAR |
| Manufacturer | KERATIN RESEARCH |
| Manufacturer | KERATIN RESEARCH |
| Material Features | Natural |
| Product Benefits | Frizz Control,Hydrating,Intense Conditioning,Moisturizing,Shine,Smoothening,Softening,Split Ends,Straightening,Strengthens |
| Product Dimensions | 2 x 4 x 4 inches; 1.5 Pounds |
| Scent Name | ORIGINAL |
| Special Ingredients | Argan oil, coconut oils, proteins, amino acid complexes |
| Unit Count | 4.00 Fluid Ounces |
R**.
Great affordable straightening option for men with curly short hair
I have had very frizzy/curly blonde hair since I was young. I now have short hair, slightly over an inch long on the top. I like to blow dry my hair to style it into shape. I have been using this treatment for 2+ years now, about every 4-6 weeks. Without this keratin treatment I can't really shape my hair at all. Blowdryers don't create shape that holds and flatirons make my hair awkwardly bone straight. Pros of this product: - Result is great for 3-4 weeks and makes my hair so much faster and easier to style with a round brush. This saves me so much time fighting with my hairspray and comb to get the front of my hair to look nice. - Very quick to apply on men's short hair (takes me like 5-7 mins to comb through). - Can wash out next day, don't need to wait 3 days like common salon products. I usually try to wash out after 12 hours, but have waited as little as 8 hours before too. Cons: - Once your roots grow out with short hair, it becomes much harder to style. So I do have to re-do this process about once monthly. That's not the product's fault, but worth calling out for men with short hair considering this. I think the net time savings though every morning is worth the 45-60 mins this takes me monthly. - To get the best results, you'll want to buy a skinny straightener specifically designed for men with short hair. That enables you to get down to the root of your hair when you straighten it during the treatment. There are plenty of affordable options on Amazon. - The smell is chemically, but honestly not that bad. - The fumes do irritate my eyes. But it's not unbearable. Having a fan is a game changer. Merely cracking the window doesn't really reduce the irritation. Overall I very much recommend this product to men with curly hair who want the ability to shape their hair more. Love the way my hair looks, especially the first couple weeks after I do the treatment.
N**E
Follow directions!
Years ago, I had use Ion's Smoothing system. It worked pretty good. The idea of blowing my hair dry and straightening it without product was scary so I decided against the manufacturer's directions to use my own products for the blow dry and flat iron processing. My results were still pretty good. A year ago I started to notice that my relaxed hair was showing really bad damage around the hairline kind of crunchy, kind of thin, and I was concerned, so I decided to begin taking supplements suchbas liquid collagen, biotin and sawgrass. About 6 months ago, I began applying batana oil. These seemed to be working, but yhe results weren't 100% yet. I decided to go back to keratin. I chose this system because I couldn't find the Ion Smoothing System. I followed the directions and my results were really good. I used an oblong hair dryer for the blow dry. Then I used a ceramic heat brush as I sectioned my hair. Before flat ironing each section in 1/8 increments, I combed it out with a hot comb. I also used a pencil flat iron for the areas around my hairline (this was the final step that really made everything stand out). I did not use any other products until I finished the processing. I wrap my hair and for the week after initial processing and make sure that it didn't get a drop of water in order to maintain the look. Now I don't even need to flat iron it ... blowing it is fine. Using hot curlers versus a curling iron also gives a more polished look. FYI, I dye my white Grey hair Tiger Brown using Herbb shampoo
L**.
Works so well
Even though I color my hair myself, I was initially nervous to try to straighten my hair. It was much easier than I thought, and it definitely does take 2 - 3 hours from beginning to end. Not only does my hair look great and it's so easy to take care of now, but it's so soft too. I've become one of those females who's always playing with her hair... but I can't help it!
K**R
Very toxic! DO NOT USE. HAVE ME CHEMICAL BURNS!
These pictures were taken on the 2nd day when the burns were already improving. This product is horrible. I knew something wasn't right when I saw that the shampoo in the box was MK (Morrocan Keratine) and they were both probably made by the same company. I used MK keratin a few years ago and it smelled horrible and destroyed my hair. This time, this product burned my ears and neck even though I applied it as directed in the box. My skin rarely gets irritated by something, so then I went to see the ingredients and discovered that it has so many carcinogens and substances that nobody should allow near them. I regret using this and I hope people stop putting these chemicals on their heads!
T**E
Worked Well on My Tight Curls
I used this keratin product last year, and overall it worked pretty well for me. I have really tight curls, and it definitely made my hair straighter and easier to manage, especially when I did a sew-in. It didn’t get my hair bone-straight (which makes sense given my curl pattern), but it still did its job and made a big difference. One thing to note: the smell is very strong. I highly recommend applying it in a well-ventilated area or somewhere with windows open, because the scent lingers for a day or two. Also, you have to leave it in overnight for the best results. I’ll admit I was a little impatient, which might be why I didn’t get the maximum outcome. That said, for the price and purpose, it’s a good product if you’re looking for something to help loosen curls and make straight styles last longer.
D**A
Amazing product
Second time buying this keratin treatment. It is extremely easy to use and leaves your hair shiny and soft. The first time that I use it my hair was really burnt by bleach, after like a month I got this treatment and it helped my hair a lot. It is not magic and is not going to bring you back from melt but it did help my hair to feel softer and shiner again.
V**I
Arbeite professionell damit. Auf ein gutes Ergebnis kann ich mich immer verlassen. Einige Produkte davor ausprobiert, keins kommt hier nahe.
H**!
Jag är jätte nöjd.
M**Z
Keratin Research Brazilian Treatment I recently tried the Keratin Research Brazilian Keratin Treatment, and I’m genuinely impressed with the results. My hair became noticeably smoother, shinier, and much easier to manage after just one application. The frizz was reduced dramatically, even in humid weather, and the straightening effect lasted longer than I expected.
A**Y
Follow instructions to the letter hair will last a good 12 weeks
E**I
Das war sehr schlechtes Produkt die ich keiner empfehle , er macht die Haare komplett kaputt und jetzt muss ich mein haare viel schneiden nur wegen diese Produkt , schade für 40€ !!!
Trustpilot
2 weeks ago
2 months ago