

✨ Unlock your hair’s ultimate smooth glow—no frizz, no fuss!
The Brazilian Straight Complex Keratin Hair Treatment by Keratin Research is a formaldehyde-free, salon-quality formula that instantly straightens, smooths, and strengthens hair using keratin proteins and nourishing argan and coconut oils. Designed for professional results at home, it delivers frizz-free, shiny hair lasting 3 to 6 months, dramatically reducing styling time and damage. Ideal for most hair types except some bleached blondes, this 4-piece kit offers a safe, effective, and time-saving solution for busy professionals seeking effortlessly sleek hair.




| ASIN | B09RP2VZVS |
| ASIN | B09RP2VZVS |
| Best Sellers Rank | 39,457 in Beauty ( See Top 100 in Beauty ) 4 in Chemical Hair Straighteners |
| Brand | KERATIN RESEARCH |
| Colour | Natural |
| Customer Reviews | 3.9 3.9 out of 5 stars (5,539) |
| Customer reviews | 3.9 3.9 out of 5 stars (5,539) |
| Date First Available | 27 April 2022 |
| Format | Lotion |
| Is discontinued by manufacturer | No |
| Item dimensions L x W x H | 5.1 x 10.2 x 10.2 centimetres |
| Item model number | GLVAR |
| Item model number | GLVAR |
| Item weight | 24 Ounces |
| Manufacturer | KERATIN RESEARCH |
| Manufacturer | KERATIN RESEARCH |
| Package Weight | 0.58 Kilograms |
| Package dimensions | 19.4 x 17.1 x 4.6 centimetres |
| Product Dimensions | 5.08 x 10.16 x 10.16 cm; 680.39 g |
| Product Dimensions | 5.08 x 10.16 x 10.16 cm; 680.39 g |
| Scent | ORIGINAL |
| Special features | Natural organic results- formaldehyde-free |
| Volume | 120 Millilitres |
A**G
It works!
I don’t usually write reviews but felt this product needed it! I’ve had a few Brazilian blow drys at the hairdressers but needed to find a cheaper alternative. Didn’t have much hope for this to be honest but I can honestly say it works so well and it may of even been better than the salon. It’s easy to do though it takes some time. I have very thick and frizzy 2b hair which usually leaves me looking like hagrid when I leave it to dry. This stuff means I can leave it to dry naturally and it is so soft and smooth. Dries quicker and feels so healthy. I applied the treatment about 3 months ago and it is still noticeably smoother! The only small downside is that it does leave your hair smelling a bit funky but only really when it gets wet. Once dried it’s not noticeable! 10/10 recommend!
M**B
An honest, non biased review of a product which works for my hair
This is the 4th time I’ve purchased this product and so I felt a review was justified. This product has honestly changed my life! A little dramatic I know but it really has in that it has saved me hundred of hours, this treatment takes about 3 hours to apply so yes it’s a slog but it really is worth it because once applied I do not heat treat my hair in any way shape or form for approximately 3 months. I just wash, air dry and go. Here are the before and after photos of my hair. As you can see following the treatment it is immaculately straight, this is before i wash it out (which will be tomorrow) so after tomorrow my hair will be less straight, and more defined curls with zero frizz which is exactly how I like it, I don’t dig the polka straight look but if I did, it would only take 10 minutes to achieve this look rather than 90 minutes which is how long it would normally take. If you’re looking for something which will make your curly hair more manageable and defined I would definitely give this a go. Warning! It does really quite sting your eyes so make sure you apply in a well ventilated room! ***update! I have now added photos of what it looked like after I washed the treatment out 48 hours later and left it to air dry.. (see photos taken in room with green walls) you can see how the roots are a little wavy (probably as I couldn’t get so close with the straighteners) I should also add that I used straightener set to 230 degree. In the past when I’ve used straightener which only peak at 180, the end result was not so straight
F**S
Left my hair hard and crispy like plastic
I followed the instructions and watched. A YouTube video of someone using this exact product and my results were very different. One of the reviews mentioned the formula has changed recently and I’m sure I have the newer formula. I washed my hair three times with the shampoo just to be sure, blow dried throughly on a medium heat. And then used a very fine toothed comb to apply the product in 2cm sections (took over an hour). I left it in for the recommended 90 mins and the second I started to blow dry it, my hair became hard (you could knock and it would make a sound). I also noticed that the brush I was using to blow dry had clumps and clumps of hair, I have never ever in my life lost so much hair. I was expecting to see right through to my scalp every time I looked at the mirror. I continued anyway using the brush to try and separate the strands and it eventually did. The flat ironing seemed to fuse each strand together and leave it hard once again. I tried lowering the heat, making it hotter, using with and without a comb but each time the result was the same. I read that sometimes too much keratin can cause build up and it will sit on top of your hair causing stiffness, but I used the comb to ensure there was no build up. It’s the next day and my hair still feels like plastic and i think I have permanently damaged it. I’ll be surprised if I’m not bald by the next wash and sadly that’s not a joke.
D**S
Value for money
Good quality
S**I
Outstanding results
This product is by far a miracle treatment to get that perfectly formed straight hair. My hair has never been in such fabulous condition. And, it doesn't' fizz when I'm out in rain or damp conditions. It needs less attention too as it stays looking great all day without any fussing or correcting. When out in the wind, it just falls back into place when back in doors. Sheer Bliss. Beforehand, I watched plenty of YouTube videos to ensure I applied it the right way. The best advice was to stick to the instructions. Also, I only wish I'd coloured my hair the week or two before as it did lighten my hair to a silly colour, which I hated. I had to stick with this horrid colour for 2 weeks. Seek advice on this. In the UK it is FORMALDEHYDE FREE so no smells at all and, less chemicals applied. I LOVE IT. My hair is just below shoulder length, wavy and finer than most. It goes fizzy in the least damp conditions and, put simply, it's annoying. For the length of my hair this little bottle 4 oz was about right. In fact I did have some left over. I would guess for the thicker, long hairy you will need a bigger bottle. It's much cheaper for our friends in the USA and, you get a bigger bottle. Lucky you. It's a good reason to move though. Happy hair days.
K**E
Still undecided
Ive used keratin treatment for many years now. My own fault but I expected the bottles to be bigger I didn't check this before I ordered. I usually use coco keratin treatment but thought i would give this brand a go. First the clarifying shampoo didnt seem to strip my hair as well as the others I've used in the past, not sure if this matters or not. This brand did leave a burning sensation on my scalp, more so than the coco brand. I followed the instructions, after straightening my hair felt like straw... I resisted the temptation to wash it out and waited overnight. Again if I was to compare with coco brand at this stage my hair felt better with that treatment. I washed and blow dried and straightened and yes I can tell its had keratin treatment, it feels softer and easier to manage but I can still feel the treatment in my hair, with coco at this point I can feel no dryness or left over treatment. It's only been a day so I'll report back on how it feels after a few more washes. I think next time I'll stick to what I know though 😏 *Update* Although it did the job, it didnt last as long as coco does, I'll be returning to using that as my go to.
S**G
Never but this product, it smells like hell, and certainly has strong chemical good enough to cause cancer or other issues. I couldn't keep this product on my scalp for more than 2 hours and its been 2 months now, that I have lost half of my hairs. I never had a hair loss problem, prior to using this product. Absolutely, bad choice and terrible product for hair.
D**E
Works well, Easy to use Saves money ( same procedure in salon will cost 5 times more)
T**D
Den va faktiskt bra ! Nöjd
L**A
Fa il suo, gli liscia bene
D**D
Tratamiento muy recomendable te deja el pelo listín encrespamiento. Las instrucciones tan en inglés tuve k mirar tutoriales en YouTube.
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