









✨ Unlock your hair’s true potential — smooth, shine, and slay every day!
The Complex Brazilian Kit by Keratin Research is a formaldehyde-free keratin hair treatment designed to instantly straighten, smooth, and repair hair with lasting effects of 4-6 months. Infused with Argan and Coconut oils plus keratin amino acids, it nourishes and strengthens hair while eliminating frizz. Easy to use at home, it delivers professional salon results, making hair elastic, flexible, and naturally shiny without harsh chemicals.











| ASIN | B0BQL4RNRS |
| Benefits | Instantly straightens, smooths, repairs, conditions, and strengthens hair, leaving it elastic, flexible, and soft with a naturally vibrant shine |
| Best Sellers Rank | 90,991 in Beauty ( See Top 100 in Beauty ) 720 in Shampoo & Conditioner Sets |
| Brand | KERATIN RESEARCH |
| Brand Name | KERATIN RESEARCH |
| Country Of Origin | USA |
| Customer Reviews | 3.9 out of 5 stars 217 Reviews |
| Hair Type | All |
| Hair type | All |
| Item Form | Cream |
| Item Weight | 4 Ounces |
| Item form | Cream |
| Item weight | 4 Ounces |
| Manufacturer | KERATIN RESEARCH |
| Material Features | Suitable for hair type up to 3a. Not for African or coarse kinky hair. |
| Product benefits | Instantly straightens, smooths, repairs, conditions, and strengthens hair, leaving it elastic, flexible, and soft with a naturally vibrant shine Product benefits Instantly straightens, smooths, repairs, conditions, and strengthens hair, leaving it elastic, flexible, and soft with a naturally vibrant shine See more |
| Scent | Coconut |
| Scent Name | Coconut |
| Special Ingredients | Keratin Amino Acids, Collagen Amino Acids, Hydrolyzed Keratin, Moroccan Argan Oil, Jojoba Seed oil |
| Unit Count | 120.0 millilitre |
C**I
Great product fab result
. I don’t normally do reviews but having used this product for the first time, due to my unruly 4c knotted at the routes unmanageable couldn’t get my comb through hair. Don’t get me wrong I love my thick springy hair , on a positive note I doubt I’ll ever go bald or need a hair transplant. I used this product today having read the instructions twice over , I followed it to the letter with astonishing results.. I now have poker straight run my fingers through without getting stuck. The photos here speak for themselves.. Dear contemplators some beneficial pointers for best results. Use the shampoo provided for preparation , It strips the hair of oils dirt and Off-course opens the cuticles ready for the elixir of this liquid gold product. Dry your hair throughly from roots to tip I love the Afro pick dryer for this so much quicker. There is a generous amount of product to cover most hair types. Put gloves on, Squeeze the creamy liquid into a small bowl. I used a tinting brush to apply after sectioning my hair. As per instructions I covered with a shower cap set my timer for 90 minutes , then occupied myself with some drawing , wrapping a present and generally keeping busy. Ninety minutes up I removed excess product with the back of my comb, then blow dryed to nearly dry. Last tip before straightening, open the windows of the room your in , place a mini fan on your dresser low speed is enough to blow the fumes away when you start straightening, this took me about an hour careful to press small sections at a time. The whole process took about 3.5 hours and worth all the effort as it has saved me a small fortune in travel and salon fees. A well deserved 5stars at this point as I’m delighted with the result I doubt a salon could have done much better, plus I listened to my audio book rather than inane dull conversation.. as one often does at expensive salons. I pray the results will last for the foreseeable.. if you haven’t already ladies with mega frizz , Go on give it a go !!
A**Y
Follow instructions
Follow instructions to the letter hair will last a good 12 weeks
R**I
Product ruined my hair ! Review from someone who has used multiple brazillian blowdry kits.
If I could give this product a score of -100 I would. Thought I would use this brand for the first time because of the positive reviews. I normally use a brand called Alfaparp and it has done the job wonderfully previously. My hair "was" thick and curly, not ringlet curls but curly. I normally do a DIY treatment so that I can shower in summer and leave my hair to dry naturally. Normally dries great, keeps my hair straight ish, with natural waves and frizz free. Also gives my hair a chance to heal without blowdrying and straightening. Although I enjoy my curls, day to day I prefer straight hair as its easier to manage. Used this kit at home followed instructions to a T. Instantly after the treatment I noticed my hair was greasy with heavy build up. I waited it out to see how it was after a few washes but I couldn't get this residue out. It did however straighten my hair, but not in a healthy way, it basically permanently straightened my hair "I mean chemically permanently straight". One year on and my hair is straight, flat, greasy , curls and waves are gone. My lustrous hair that I wanted to tame is now so thin and flat. I tried contacting the company by the only email address I could find and never got a response. I remember initially emailing asking a product enquiry and got a response from someone's personal email (weird) offering me 2 worded answer at best. But after using the product I reached out to them again about the greasiness of my hair and the waxy texture and never heard back. I also contacted this sites customer service who said they can't do anything as I'd used the product. Which is p*ss poor, because how do you know if its going to do damage unless it's used? Anyway, to my beautiful sisters who want/Need a product to help with their hair, PLEASE PLEASE PLEASE stay away from this product. Use a reputable one like the one I mentioned above. For all I know this product is made in someone's back garden with a cocktail of chemicals that really should not be sold as a hair treatment. Keep scrolling, do your research and check out the one mentioned above. Normally a few months later after my treatment, it wears off and my hair goes back to normal. Sadly a year on and it's exactly the same. Even my regrowth feels different. Hope this is helpful and that you find a treatment that is affordable, safe, does what it says, and most importantly brings some joy :)
M**S
Works but takes a long time
I had bought this after previously having salon treatments to smooth my hair. I was looking for a quicker, cheaper option to do at home. The product itself is very small but was plenty for my long/thick hair. The instructions were clear and gave options for each different hair colour. I had to purchase a separate hair kit with the brush, gloves and cap required to use this product, which added an extra £5 to the overall cost. The product was easy to apply to the hair with the brush, it was just time consuming as you have to do it in small parts. I wasn’t impressed with the smell and felt slightly dizzy after breathing in the fumes, even in a well ventilated bathroom. Blow drying the hair was fine but straightening the hair with the product still on (only for dark hair) meant that occasionally the fumes would sting my eyes or my throat if I was learning in the wrong direction. For my dark hair the product needed to be left on for 90 minutes. I had to run some errands so ended up leaving it on much longer before finally washing out and it was fine. I am very pleased with the result, it has tamed my frizzy baby hairs that constantly stick up however, it takes such a long time and can be a bit fiddly I may opt for the easy/quick option of just rubbing into the hair or go back to the salon and read a magazine while someone else does all the work!
A**K
Not what I expected
Ive done keratin treatments many times before and my hair looked amazing. I was quite disappointed after trying this one as I couldn’t see a massive difference and my hair looked slightly damaged. I wouldn’t buy it again
N**O
Very good
Yes, the product is very good. I like it, I would like to buy in large quantities shine hair No smell bad
M**S
Absolutely brilliant
I have horrendous wavy thick hair. I usually get it chemically straightened in salon but thought I'd give it a go. It worked! Took a while to apply and was a pain but results are incredible..hair soft and poker straight. It did lift my colour..I was black..but I actually love the result. Seriously impressed
J**L
Bad results
This is the second time I have used a keratin treatment at home. Prior to this I have used the Cocochoco however it is only currently available in a larger size, so following the reviews on this product I decided to give it a go. Having followed the instructions carefully, at no point does it say to leave the treatment on longer like I have since read in the reviews (upto 3 days for better effect) It simply says, wait Atleast 20 mins which I did and there is no change apart from that is has significantly changed my hair colour and made it lighter and copper, from the original medium brown!
Trustpilot
1 month ago
2 weeks ago