The best keratin treatment your coloured hair needs today.

woman with topknot thinks about keratin treatmenets

If you’re looking to intensify your coloured hair, the best keratin treatment products can work wonders on your hair.

Not only will it restore and replenish your colour treated tresses, it will lock the colour in and give it a strong protective layer that prevents colour pigments from escaping when you wash it.

What is keratin?

Keratin is a natural protein that makes up the main structure of your hair and skin. It acts as a protective shield against heat, humidity and frizz. Over time, your hair loses keratin from doing fun things like dyeing and straightening your hair, but also from exposure to the sun and weather and life. 

What is a keratin treatment?

The best keratin treatments are a rising trend and a way of putting the keratin goodness back into your hair. 

Also known as Brazilian hair treatments, they’re a semi-permanent, hair-smoothing, curl-softening professional chemical treatment that make hair straighter, shinier and look healthier.

This type of treatment will cost you big bucks in the salon (the tune of £400 in some places). But there are at-home kits, products and remedies that do the job almost as well.

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Are keratin treatments safe for coloured hair?

Keratin is perfectly safe to use on coloured hair and a long-lasting way to lock the colour and shine in.

The treatments are usually made up of a chemical like formaldehyde (which creates the long-lasting smoothing effect), conditioners, and keratin.

There was a point not long ago where people got scared of the amount of chemicals in keratin treatments, but since then there are a lot more products available that aren’t so harsh on coloured hair (of course, they’re on this list!).

What other keratin products are available?

There are also plenty of ‘Keratin Treatment’ products – oils and serums that have almost the same effect as the chemical treatments (they’re in this list too).

Whatever you choose to use, you’ll need a sulphate free shampoo and great conditioner to keep your coloured hair in tip top condition:

You can also check out our guide: How to do a keratin treatment at home for step by step guidance to the most fabulous results.

Here are the top 6 keratin treatments we recommend for your coloured hair right now!

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Best keratin products at a glance.

Keratin ProductLooks likeBest forRatingBuy now
Brazilian Straightq? encoding=UTF8&ASIN=B01N3AMMX5&Format= SL160 &ID=AsinImage&MarketPlace=GB&ServiceVersion=20070822&WS=1&tag=colouredhairc 21&language=en GBbest keratin products brazilian straightCoarse, thick, frizzy hair. four star icon Edited
Vitamins Hair Serum q? encoding=UTF8&ASIN=B01456DJ66&Format= SL160 &ID=AsinImage&MarketPlace=GB&ServiceVersion=20070822&WS=1&tag=colouredhairc 21&language=en GBbest keratin products vitamins hair serumEvery day quick fix.three star icon Edited 1
CocoChoco Goldq? encoding=UTF8&ASIN=B01AVFQ2OQ&Format= SL160 &ID=AsinImage&MarketPlace=GB&ServiceVersion=20070822&WS=1&tag=colouredhairc 21&language=en GBbest keratin products cocochoco goldGreat value for money and results. five star icon Edited 1
Natural World Keratin Oilq? encoding=UTF8&ASIN=B00FLUCAUC&Format= SL160 &ID=AsinImage&MarketPlace=GB&ServiceVersion=20070822&WS=1&tag=colouredhairc 21&language=en GBbest keratin products natural world oilLots of uses. four star icon Edited
GK Hair The Best Hair Smoothing Keratin Treatmentq? encoding=UTF8&ASIN=B006P1EJMS&Format= SL160 &ID=AsinImage&MarketPlace=GB&ServiceVersion=20070822&WS=1&tag=colouredhairc 21&language=en GBthe best keratin products GK hair smoothingHard to tame, coloured locks.five star icon Edited 1
Olaplex No.3 Hair Perfectorq? encoding=UTF8&ASIN=B00SNM5US4&Format= SL160 &ID=AsinImage&MarketPlace=GB&ServiceVersion=20070822&WS=1&tag=colouredhairc 21&language=en GBthe best keratin products olaplex no 3Restoring and nourishing.five star icon Edited 1

TOP PICK!

Cocochoco Professional Gold Premium Keratin Hair Treatment

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This one of the best keratin treatment products for us in terms of value for money and results. Our colour just seemed to pop more after use and our hair had a glossy sheen that lasted even after the first wash. We didn’t have to be so thorough with our straighteners again. For how long it lasts, this is the best keratin treatment on the list for us. And we love the Cocochoco brand!


1. Brazilian Straight, Keratin Home Use Treatment Kit

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They say:

  • Their specially formulated keratin treatment will give you straighter, smoother and silkier hair that can be managed and styled with ease.
  • It also provides added heat protection against using your hair dryer and hot irons.
  • Brazilian Straight claim the effects of the keratin treatment typically lasting up to 3 months if you look after it. 
  • Suitable for any type of hair, including coloured, highlighted, dry, normal or greasy. 

Reviewers say:

“I chose this keratin treatment as it contains no formaldehyde and it’s brilliant stuff. It is a bit of a faff to put it on and you have to set aside half a day, but the benefits are so worth it. I have crazy coloured hair that’s frizzy and I straighten it a LOT. Without the treatment it takes me over an hour to wash and get my hair looking ok. When I use the treatment it only takes 10 mins to get it looking fabulous.”

“This is good value IMO even for gorgeous, easy-to-style hair. My hair is medium-length and fine and I dye it occasionally so it’s frizz-prone. This Keratin kits made it feel like actual, normal hair, soft and swishy and the effect lasted around 5-6 weeks. So not the 3 months they say on the box but still I was happy.”

“I have thick hair just past shoulder length. You have to wash it with the shampoo provided, dry it so there’s not a drop of moisture left. Then you paint the solution onto the hair, leave it 20 minutes. Blow dry the hair. Then straighten with straighteners, every section 5 times. I got some help as my arms were aching but the result was amazing. It really restored my hair.”

We say:

The application process was straight forward. You wash your hair with the special shampoo and let it dry thoroughly before applying the keratin treatment. It’s a bit toxic smelling despite not containing any formaldehyde so you need to apply it in a well ventilated room. 

You comb it through and leave to dry thoroughly (we got on with some housework!). Once it’s dry you need to straighten small sections of hair with hot straighteners – use our favourite, ghd Gold Styler Professional Straighteners. Check our review of them here.

Take time over the straightening part.

Go over each section up to 7 times? This is a lot! One reviewer recommended getting a heat resistant glove to protect your hands from holding the straightener for so long!

The results? Totally shiny smooth and silky hair. It was well worth the effort you have to put in. You can’t wash your hair for three days afterwards so plan that in too.

Brazilian Straight can tame even the most coarse, thick, frizzy hair. Overall, this is a best-seller for a reason – great results that last.

2. Vitamins Hair Serum Keratin Treatment Moisturiser 

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They say:

  • This is a ‘Keratin Protein Hair Repair Aqua Anti Frizz Serum.’ 
  • It contains Moroccan Argan Oil for dry and damaged Hair.
  • Suitable for coloured, curly, afro, wavy or straight Hair. 
  • Rejuvenates hair damaged by sun and styling heat products.
  • It’s great as it contains no nasties – being paraben free, Sulphate & SLS free and alcohol free.

Reviewers say:

“I was fed up with my hair which is severely damaged after years of colouring and highlighting. My hair is down to  my shoulder and breaking off and falling out. TIT was getting me down. I was looking for a Keratin treatment without all the nasty chemicals and decided to give this one a shot. I am thrilled with the results. My hair feels stronger and so much cleaner. I use this serum with the coordinating Shampoo and conditioning mask.”

“I’ve used this and my hair is so so so soft and looks so much healthier. The noticeable results in my case were instantaneous. The smell is great as well.”

“Even my hairdresser noticed a difference when I started using this regularly! Said my hair felt much healthier. I will definitely continue to purchase this product line. Very happy with this purchase.”

We say:

This keratin treatment is a leave-in serum that you apply on damp hair from root to tip. We didn’t expect it to work wonders compared to other, more robust treatments, but it definitely made our hair feel softer and silkier.

Use it with the other products in the range for the best effects. If you’re looking for an every day quick fix that will nourish your hair, this is a really good buy.

3. Cocochoco Professional Gold Premium Keratin Hair Treatment

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They say:

  • Cocochoco’s Gold Hair Treatment is a premium keratin hair treatment and one of a big range that will give your hair a smooth, straight, and glossy look. 
  • Helps your coloured hair to be restored back to its original healthy-looking state without the need to be conditioned continuously. 
  • This one doesn’t change the texture of your hair, just helps it look its best. 

Reviewers say:

“I started using this product for the first time six months ago. Now I can’t live without it! I can now wash blow dry and straighten my hair in no time and my hair feels incredible.

“I was wary about trying a Keratin treatment for the first time, and doing it myself, but the reviews for the Cocochoco products were great so I gave it a go! I’m so glad it did. I cannot rate it enough.

“My hair has never looked and felt in such good condition. My hair is so glossy now! It doesn’t dry out your hair and because I’m not using as much heat on it, my hair stays glossy. I’m also now using the shampoo and conditioner that is sulphate free as it recommends. I’m hooked.”

We say:

Applying the treatment is simple and can be done to all hair types, including already chemically treated hair like ours. Like other treatments, you use their shampoo to cleanse your hair, leave it to dry thoroughly and then apply the keratin treatment.

All keratin treatments will make your eyes water because of the chemicals in the keratin treatment that make your hair so glossy and straight – so don’t let the reviews put you off. We could feel it working straight away. You comb it straight then blow dry and use straightening irons then leave it for 3 days before washing.

This one of the best keratin treatment products for us in terms of value for money and results. Our colour just seemed to pop more after use and our hair had a glossy sheen that lasted even after the first wash. We didn’t have to be so thorough with our straighteners again.

For how long it lasts, this is the best keratin treatment on the list for us. And we love the Cocochoco brand!

4. Natural World Brazilian Keratin Smoothing Therapy Hair Treatment Oil

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They say: 

  • 95% naturally derived ingredients. 
  • Vegan and cruelty free.
  • Smooths and soothes hair.
  • Eliminates frizz.
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Reviewers say:

“I‘m a hairdresser and I can safely say that this is the best keratin treatment oil I’ve ever used. I’ve been colouring my hair since I was a teenager so have to have regular keratin treatments to keep my hair looking in great condition. Now I use this oil to top it up in between so I don’t have to have the treatments as much.”

“I had the full keratin treatment done and it was starting to wear off after a few weeks so I looked for something that could restore it. I found this oil worked better than the actual salon treatment! And so much easier to apply. I’ll be getting this regularly now for sure.”

We say:

This is a little power pump that glosses up your locks and smoothes your hair shaft to get a glorious shine. You simply apply to clean, towel dried hair, concentrating on the lengths and ends and dry and style as usual. 

This keratin treatment is so versatile and that’s why it’s on our best buys. You can use it in the shower, before shampooing or by mixing it with your conditioner as well as before and after blow drying. It’s great to have to keep your colour looking sleek and smooth in between salon trips.

5. GKhair The Best Hair Smoothing Keratin Relaxer Straightening Treatment.

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They say:

  • The Best Keratin Treatment product to smooth and improve the softness of your hair.
  • Reduces friction to prevent fly away frizz for up to 5 months.
  • It is formulated to reduce stiffness in the hair and restore it’s natural elasticity so it feels softer.
  • It strengthens your hair to better withstand heat and helps make hair less prone to breakage.Your hair becomes smooth and manageable with fewer tangles.

Reviewers say:

 “I watched a lot of online tutorials about the best keratin treatment products and how to do keratin treatments before I bought this one. I must say I love it! The application process is really easy in comparison with other keratins. It doesn’t have such an overpowering  smell and the result was amazing… better than when i paid £400 to get it done in a salon! i 100% recommend it.”

“I followed the instructions exactly and was so pleased with the result. I was worried about using it on colour treated hair, but clearly my hair needed this as it’s never looked better!”

“I have wavy hair that goes completely frizzy in the damp. After using this, I can go out in the dampest weather and no frizz, my hair is always smooth.” 

We say:

This keratin treatment is a game changer for those with hard to tame, coloured locks. After a shampoo and rough-dry, the smoothing solution was brushed on our hair in small sections. After 15 minutes, we dried it again, then straightened it in sections. 

This is definitely one of the best keratin treatment products out there. Our wavy coloured hair got noticeably bouncier, and much much easier to style. It was also smoother, but not as straight as expected. Although we didn’t use red hot straighteners as we were worried about burning the colour! The results have lasted 6 weeks so far…this is well worth the hefty price tag.

6. Olaplex, No 3 Hair Perfector

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They say:

  • Olaplex contains a patented active ingredient that works on a molecular level.
  • It repairs and restores the broken bonds caused by colouring and heat styling.
  • Strengthens and repairs damage to boost colour, shine and smoothness.

Reviewers say:

“Olaplex is a brilliant product for people who colour their hair.  I actually took mine to my colourist and have used it for my last three sets of highlights. My hair feels stronger after colouring than it normally would.”

“I use it 2-3 times a week on damp hair and leave it in for as long as possible. No more struggling with dry, brittle hair after colourings. Even my hairdresser is impressed with the condition of my hair!”

“Amazing. There’s no going back now. This has worked wonders for my colour treated hair. I love the understated packaging. This is up there with the best keratin treatment products. They say it’s a cult, and it’s true!”

We say:

This little bottle will change your hair forever. Previously only available in salons, this is a coloured hair restoring treatment that Kim Kardashian swears by. (Hey, if it’s good enough for KK…). It’s a keratin treatment product that’s made our list because it does the same job of repairing the hair bonds that are destroyed by colouring and heat as a full on keratin treatment.

It’s a once-a-week at home treatment that transformed our exhausted hair bonds overnight. Our hair was noticeably softer, smoother and straighter. It feels like medicine for your hair. It’s full of goodness and you can use as a leave-in, overnight treatment or as a luxe 10-minute pre-wash treatment. Or all of the above.


TOP PICK!

Cocochoco Professional Gold Premium Keratin Hair Treatment

q? encoding=UTF8&ASIN=B01AVFQ2OQ&Format= SL250 &ID=AsinImage&MarketPlace=GB&ServiceVersion=20070822&WS=1&tag=colouredhairc 21&language=en GB

This one of the best keratin treatment products for us in terms of value for money and results. Our colour just seemed to pop more after use and our hair had a glossy sheen that lasted even after the first wash. We didn’t have to be so thorough with our straighteners again. For how long it lasts, this is the best keratin treatment on the list for us. And we love the Cocochoco brand!