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✨ Unlock your hair’s ultimate silky glow — because frizz is so last season!
GK HAIR The Best Smoothing Keratin Treatment is a professional-grade Brazilian blowout complex that temporarily straightens and smooths hair for up to 5 months. Enriched with natural seed oils and anti-aging keratin protein, it deeply conditions, reduces frizz, and enhances shine. Designed for at-home use, it delivers salon-quality results with customizable heat styling up to 400°F, suitable for all hair types and free from parabens.




































| ASIN | B006P1EJMS |
| Best Sellers Rank | #35,266 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #15 in Chemical Hair Straighteners |
| Brand | GK HAIR |
| Brand Name | GK HAIR |
| Customer Reviews | 4.0 out of 5 stars 1,876 Reviews |
| Global Trade Identification Number | 00815401014019 |
| Hair Type | All |
| Item Form | Liquid |
| Item Weight | 0.6 Grams |
| Manufacturer | GK HAIR |
| Manufacturer Part Number | GKH-JT-420-10 |
| Material Features | paraben free |
| Model Number | GKH-JT-420-10 |
| Product Benefits | Strengthening |
| Scent | Floral Blossom |
| Scent Name | Floral Blossom |
| Set Name | GK HAIR Keratin Treatment |
| Special Ingredients | Keratin |
| UPC | 815401014019 |
| Unit Count | 10.1 Fluid Ounces |
A**A
It WORKS! But it smells so horrible after the heat styling
Okay, so far I am absolutely ENAMORED with this product!!!! So much less expensive than getting it professionally done. I’ve never done keratin before but I think I did a really good job! PLEASE WEAR GLOVES AND A HIGH LEVEL MASK WHILE USING THIS PRODUCT. Do NOT handle the treatment directly on your skin. Do not use this product after shaving, waxing or exfoliating your facial skin. All I wanted was to not have to worry about my hair for work, the hospital, and clinicals as a healthcare professional and student. As a model, this hopefully makes my life easier and I should still be able to have my hair curled for shoots. But I haven’t finished working with it yet… I did some of the steps out of order by accident. Here is your comprehensive guide of how I did this, and the honest truth about it so far. So I double-shampooed my hair with a clarifying shampoo, and then put the product through all of my wet hair for one hour. After doing this, I left it on for an hour. Then I ended up blowing my hair dry with a round brush (two different types of hair dryers) and then went over it with two different straightening irons. This is where I made a mistake - you are supposed to RINSE this product out after an hour and use a deep conditioner for 5 minutes (see step 5). I mistakenly left it on for about 24 hours. Do not leave it on for that long. The fumes aren’t good for you - you should be wearing a high level K/N95 or elastomeric mask while working with these chemicals. (Google Brad Mondo Keratin - you’ll see). The actual product doesn’t smell bad - it’s actually a cream and it can splatter a little. But it is easy to spread on your hair and cover each strand. One 3.4 oz bottle was more than enough for my hair, even though I have long, dense hair. As you can see in the photo, my hair has no frizz, and it’s so shiny after rinsing the product and re-drying with a blowdryer and then a straightening iron. CONS: Since I accidentally straightened my hair without rinsing the product, there was a lot of residual gunk on my hairbrushes and combs. There was a strong smell that remained in my hair after that. After rinsing out the product, 24 hours later, my hair smells AWFUL. I did not add a deep conditioner, and it is absolutely disgusting to smell it right now, even though it is very smooth. I expect that washing my hair and deep conditioning it tomorrow should get rid of the odor. PROS: The frizz is gone, especially the ones with my baby hair around my face. My hair is shiny and straight. It’s somewhat soft too. When I went to rinse out the product, my hair did not curl up like it usually does, so the product really did break the bonds for my waves. My only goal was to get rid of the frizz for my professional life in healthcare and studying. This product really worked! Also, here is how to use the product and do it yourself the right way. Good luck! The steps from the website are listed below: 1. Wash hair twice with the pH+ Shampoo, leave the shampoo on hair for at least 3 minutes during each application. Avoid massaging your scalp. 2. Section the hair starting at the nape of the neck and begin to apply ½-inches away from the scalp using the application brush to apply “The Best” on each ½-inch sections of hair while massaging into the hair with your fingers. The hair should be saturated with The Best. DO NOT APPLY ON THE SCALP. 4. Leave product in hair for 40-60 minutes. (60 minutes for maximum smoothing result) Cover the hair with a plastic cap. 5. Rinse product out of hair with warm water. For color-treated hair: apply GK Color Protection Moisturizing Shampoo and rinse. Apply Deep Conditioner for 5 minutes, rinse thoroughly. 6. Blow-dry the hair straight on high heat with a round brush using sufficient tension to smooth the hair until 100% dry. 7. Section the hair and flat iron with GK Hair Titanium Flat iron at 400 degrees. If the hair is overprocessed, flat-iron at 375 degrees, lower the temperature further if the hair is very weak and damaged; especially towards the ends of the hair. Pass the flat iron about 2-4 times in each section. 8. Clients are free to wash their hair at any time after the treatment, using GK Hair Shampoos and Conditioners fortified with Juvexin to maintain the results of the treatment.
T**O
Tame the locks
This product has no bad smell and zero fumes. It’s easy to use and gives a great result. Directions are clear and it can be applied at home without any help. I’ve been using it every 8-12 weeks for the past 7ish years now and it’s one of the hair products I don’t want to be without. The downside is that it doesn’t last long enough and starts to loose some effect after a couple of shampoos (use cool water and sulfate-free shampoo to last longer). The cost is also quite expensive for what it is. Still, I think it’s the best keratin product on the market for home use and it doesn’t damage my hair, so while it’s not perfect it still ranks at the top of my list. For someone like me with kinky, frizzy, unruly hair, this formula works very well. I leave it on for an hour and rinse clean before ironing/styling.
N**L
New Bad Formula
I have been using the GK hair taming straightening system for over 15 years applied by a stylist in a salon (resistant formula) as well as performed by myself at home (the best treatment) including the deep conditioner. Please be aware the formula has changed for the worse in some way. I am not a stylist, just someone who has used this product and has seen the amazing benefits of the old version and the damaging effects of the new version. The old “resistant” and “the best” versions were great about 5-10 years ago. In the past 5 years especially, I have seen a drastic change in the product and how it reacts with my hair. Also as many reviewers have stated on both Amazon and the GK hair website, when you order “the best” treatment from either Amazon or GK Hair, the product often comes in a damaged packaged with a broken seal on the bottle and the product itself has a different texture (thicker) and is hard to get out of the bottle and the smell is subtle (all previous versions had a very strong smell) This might be due to the product seal being broken and the product has gone bad or expired. I recently ordered a bottle of the best treatment directly from the GK hair website and received a damaged open product which after application caused my hair to be so extremely dry that I have to use a expensive heavy conditioning repair mask treatment just to try to heal my hair from the GK hair treatment. Beware!
D**E
Good product-would recommend
Great product if you do it yourself.
S**A
Actually does work
Disclaimer: I am not a hairstylist. I’ve gotten keratin treatments done in the past, but I’ve only ever done them in the salon. I’ve gotten traditional ones where you cannot wash your hair for 3 days, but I’ve also gotten ones where you can do whatever you want immediately after. I always preferred to get the ones with zero down time because I have to tie up my hair a lot for my job and I also have an oily scalp so I do like to wash my hair every 2-3 days. Background on my hair is that it is naturally straight but it’s also naturally frizzy in nature. I have thick and coarse Asian hair that’s also color treated. The problem that I’ve always had with getting keratin treatments done was always with how my hair felt immediately after. Even though I know it’s meant to help your hair, my hair ALWAYS felt terrible leaving the salon. Literally dry, crunchy, stiff, and hard to comb through because of how dry it would be. Sometimes I even noticed new split ends after the flat iron part. Always made me wonder if it was because my hair didn’t get properly coated, if the flat iron was too hot, if my hair wasn’t fully dried before flat ironing, etc. And the worst part was having to keep it that way for 3 days until I could wash my hair again. Once I could finally wash my hair, it felt fine and I could feel the benefits of getting one done. But I almost felt like my hair was getting so much heat damage during the process. I decided to try this because I saw a hairstylist using this on herself. I followed the instructions exactly as they said. The product did come with a packet of their deep conditioner, but I decided to use my own because on the back of the packet it said to leave it on for 20 mins, but on the instructions for the treatment it said to leave it on for 5 mins. I wanted to give this a fair shot so I decided to use the deep conditioner on another day since I was running low on time. I did blow dry with a round brush and tension as they said, and made sure every section was completely dry. For the flat iron part I set mine to about 375F and did 2 passes for each section. I really have to say I’m super impressed by the results. I really do hope this lasts about 3 months like a traditional keratin treatment. Once I got to the flat iron part I did notice the smell was similar to a keratin treatment but the product during application didn’t really smell like that. Best part was my hair didn’t feel dry and unmanageable afterwards like my past experiences in salons. I took one star off because the ingredients listed on the box, on the actual bottle, and on the Amazon description are different. That does make me suspicious, but it does seem to work so I’m willing to give it a chance. Also, I had to use what felt like half the bottle for my hair length and density which means I may get 2-3 uses out of the 3.4oz bottle. However, if this really does work and I only have to do this every 3-5 months, that is totally worth it!
D**E
IT WORKS!
I am Black with a mixture of 3C/4A hair. Some of you are trying to see how this works on black hair so here is a review for my people. IYKYK... For the record, I don't really believe in curly hair types because my hair pattern becomes more kinky when dry and is curly/coily when properly moisturized. I'm mentioning it here as a reference point for the girlies. Again, IYKYK. I like this product. I've tried plenty of things to help my super dry natural hair and NOTHING really helped. My hair continued to remain dry. I know natural hair needs moisture to cooperate & I KNOW how manageable my hair is when it's properly moistured (my first henna treatment showed me that years ago). Well the instructions were simple and straightforward. I didn't notice any bad smell like some other reviewers and I couldn't have cared less what it smelled like if it worked. It was VERY easy to use so the girlies who struggled, must be struggling in life because a relaxer at home coloring is way more complicated than this. I purchased the revlon blower dryer (Dr. Curly or tangle something) brush to assist with blow drying process which made everything SUPER easy. I also combined it with an olaplex treatment but I don't feel if affected my results at all. Truthfully, what really helped, was when I washed my hair a week later. I used the Aphoghee shampoo & moisture balancing conditioner. I didn't do another olaplex treatment, just the Aphoghee and my curls were Chris Brown Poppin! My natural hair was super manageable and my entire head was 4C for reference. I know my hair is thoroughly moisturized and behaving when I don't have to drown it in product. I can spray it with some water, a little leave in (my hair is fine so I do mean a little) and a bit of Aussie curl gel (the only gel I use because it's mositurizing and mixes well with ALL my hair products. You ladies know ecostyler doesn't mesh with everything, but the Aussie Moist gel does! The product does appear to loosen your curls a bit, but I believe it just really moisturizes the hair more than a looser curl pattern. Again, I think really moisturized hair makes a difference in your curl pattern. I only noticed my new growth because it was super frizzy and very tightly curled compared to the the keratin treated hair. I did my treatment early February and it is mid-April. I noticed about 2-2.5" of new growth and the treatment is still going strong. I'm unsure if it permanently straightens hair after repeated treatments but my next application will probably be over the untreated hair first. This is not like a relaxer/texturizer. My hair is still very curly; it truly is more just manageable than before. However, eventually, I will try to see if it straightens hair with repeated applications or it only lasts so many treatments before it reverts back to my natural hair. As long as the treated hair cooperates, I don't see an immediate needs to reapply the treatment of the pre-treated section. I apologize that this review is long, but I wanted to give as much details from my perspective because I know I didn't have much to work with from a Black woman's perspective when I was unsure about ordering this.
G**V
WOW! I AM SHOCKED!
LOVED THIS PRODUCT! It was very easy to use and no fumes at ALL! Consistency was like a creamy conditioner with a nice smell. Mine came with a free deep conditioner that I used after. To say that I was SHOOK after just blow drying is an understatement. After using a TOURMALINE straightener, my hair is LIKE GLASS!! Omg!!!! No damage at all. It is clean, vegan, cruelty free, no fumes or formaldehyde!? It should be WAYYY more expensive. Quality is fantastic! Make sure you use a tourmaline straightener and work in small sections. Vanessa has an economical brand on Amazon and the straightener is amazing. Patience is key. Also, I have looong hair-like almost to my butt and thick. One bottle was enough. I also used a gentle shampoo and then used ION (from Sally’s) clarifying crystals treatment (2 packets) and left it on for 10 minutes before applying this product. I will edit review to add how long it lasted for me but I am in shock! My hair like GLASS. REFLECTIVE shiny like I cannot describe. Hairs falls beautifully and moves beautifully. Just get this!
P**S
Perfecto!
I don't believe this is over-priced at all. Me: I'm multi-racial. My hair is thick (Polynesian, Asian, Portuguese & Italian descent); long (mid-back) and has a mind of its own (wavy, curly, frizzy & dry). My hair "drinks" conditioner like a camel in the desert. I can straighten it- but it doesn't stay that way for long. With product, I can let it air dry- but it looks horribly messy. With humidity- I end up "bunning" it- which pulls on the strands, causing breakage. Getting my hair professionally straightened, or relaxed, costs well over $250 each time. I didn't have a round brush to dry my hair with; my straightener has ceramic plates (not titanium); and I didn't order the $20 bottle of GK ph+ clarifying shampoo (-I used a $4 bottle of Neutrogena Anti-Residue shampoo). Because I didn't use the exact items, I'm sure my application won't last 5 months- and that's ok! I don't mind doing the process again because it was hella simple! I was pretty surprised at how soft my hair felt, afterward. My daughter couldn't stop running her fingers through it. Last time I did this in a salon- my hair ended up stick-straight, w/no life. I couldn't add a wave, add volume- nothing! It also fried my hair & the strands broke off (she burned my scalp & I could smell my hair, burning). Nice thing about this "GK the Best Hair Taming System' is "I" had complete control over the process; "I" decided how long to leave it on (25 min); "I" decided how I wanted to straighten it; and "I" can do it again, on my own time and when I need to (3 or 4 applications in the bottle). *4 Salon applications= $1000 ($250+/each) VS. 4 home treatments=$108 (one time cost). This Amazon price tag was worth it! This is a winner! FYI- (1) the writing on the bottle is really, really small! -Invest in a magnifying glass, or find the directions on line- it's important you follow the right directions for the type of treatment; (2) it doesn't come with an application brush; (3) - or, gloves. I expected it to & for as much as the bottle cost, it would've been nice.
F**5
Prodotto da acquistare insieme al kit completo
Questo prodotto deve essere acquistato insieme al kit completo, ovvero acquistare altri 3 prodotti per un costo complessivo pari a circa 210 euro. Ciò andrebbe specificato perché magari alcuni utenti potrebbero usarlo saltando i passaggi fondamentali dati dall’uso dello shampoo pre-trattamento, dello shampoo specifico, del conditioner e della maschera protettiva. Quindi tengo a ribadire che l’uso di questo singolo prodotto è assolutamente sbagliato se non si acquista il kit completo. Una volta acquistato dunque il kit ho seguito bene le istruzioni e ottenuto, in circa 3 ore, capelli lucidi, lisci e leggeri. Spero solo che questo trattamento abbia una durata ragionevole, magari protratta per qualche mese. Ma visto il rapporto qualità prezzo posso ritenermi soddisfatta.
L**.
Very efficient
Excellent product
L**E
Le meilleur!!
Une valeur sûre. Cheveux brillant et en santé ?
I**N
Very happy with this purchase
It is one of the best products I have ever used!
A**Z
Bottle not sealed
For the second time the bottle is not sealed and only 3/4 filled.
Trustpilot
2 weeks ago
4 days ago