K18.Co

K18.Co

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How It Works

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The Science

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For at Home

For Professionals

backed by science, approved by stylists
creativity with no limits -
every hair dream realised

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"K18 Hair is a gamechanger for the hair
industry [...] it is the first time I have ever
seen a product truly heal hair."
– Sally Hershberger, Salon Owner & Celebrity Stylist

"I used it for a month and couldn't believe
the results after ONE use—my hair not only
looked healthier, it felt like SILK, no joke."
– Carly Cardellino, Beauty Editor

"In my 30 years of using hair products I have never
come across a product as amazing as K18."
– Jack Martin, Hair Colorist

"I love K18 Hair because it really allows me to
push the limits with the bleaching process."
– Aura Friedman, Master Hair Colorist

"K18 is the future of hair repair."
– Jon Reyman, Hair Stylist, Salon Owner, and Educator

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Our K18Peptide™ is the patented molecular breakthrough clinically proven to reverse hair damiage - in just 4 minutes
After spending a decade in the lab scanning and testing all amino acid sequences searching for a breakthrough within the entire keratin genome that makes up hair, we discovered one unique sequence that brings damaged hair back to its original, youthful state – our patented K18Peptide™.
We believe in simplifying the hair routine. After 10 years of complex lab research, we unlocked the peptide that makes everything else simple. K18Peptide™ gives us the freedom to liberate your routine and self-expression.
Traveling into the inner-most layers of hair to reach the core polypeptide chains (keratin chains), our revolutionary K18Peptide™ is just the right size and makeup to fit in and reconnect broken chains.

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Leave-In Molecular Repair Hair Mask

PEPTIDE PREP™ pH maintenance shampoo

Leave-In Molecular Repair Hair Mask

PEPTIDE PREP™ pH maintenance shampoo

WHAT'S YOUR K18 DOSE?

CHECK OUT OUR TEAM'S DOSES TO PERFECT YOURS

WHAT'S YOUR K18 DOSE?

CHECK OUT OUR TEAM'S DOSES TO PERFECT YOURS

WHAT'S YOUR K18 DOSE?

CHECK OUT OUR TEAM'S DOSES TO PERFECT YOURS

WHAT'S YOUR K18 DOSE?

CHECK OUT OUR TEAM'S DOSES TO PERFECT YOURS

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All salons and independent professionals here have completed our K18 Pro Certification program to provide you the best K18 experience possible.

(Wicked Good Stylist) Based @ Hot Locks Salon Spa
North Falmouth, Massachusetts 02556
1224 Beauty and Holistic Wellness Center
Vancouver, British Columbia V6P OG8
80 Sarel Cilliers Street Parow West/Churchill estate
24251 Town Center Dr, Bldg B, Studio 112

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Hair professionals can shop wholesale at the following distributors. Professionals within the US will also be able to shop directly from K18hair.com starting early 2021! Check back again soon for updates as we continue to expand globally.
Questions? Email us at hello@k18hair.com
You are now being redirected to an official partner website for this region where you can shop K18 Hair.

Here's what you need to know before seeking out this buzzy leave-in mask.
K18's Leave-In Molecular Repair Hair Mask
Sydney Sweeney Chopped Her Hair Into a Lob and Said Goodbye to the Middle Part
A Moment for Megan The Stallion's Light-Up Nails, Please
Millie Bobby Brown Just Chopped Her Waist-Length Hair Into a Bob
Sydney Sweeney Chopped Her Hair Into a Lob and Said Goodbye to the Middle Part
A Moment for Megan The Stallion's Light-Up Nails, Please
Millie Bobby Brown Just Chopped Her Waist-Length Hair Into a Bob
Kirbie Johnson is an LA-based beauty reporter, on-camera host and producer, having spent nine years in the digital beauty and entertainment space. She hosts Gloss Angeles , a beauty podcast, and has produced 500+ beauty segments in her career, accumulating over 100M views by testing out the latest beauty trends and interviewing... Read more
I Tried K18's Viral, Celebrity-Backed Hair Treatment
How does it fare on my thick, unruly hair?
My Hairstylist Told Me to Use Sun-In On My Dark Hair and I'm Never Looking Back
My hair is giving beachy bohemian and I love it.
The brand just launched a range of color-depositing products.
Alison Brie's Hair Has Seen Some Shit
The actor shares behind-the-scenes details from the most iconic roles (and haircuts) of her career.
All products featured on Allure are independently selected by our editors. However, when you buy something through our retail links, we may earn an affiliate commission.
TikTok has been buzzing over the #K18HairFlip , a hashtag created by hair-care brand K18 , which has accumulated 10.6 billion views on the platform as of this publication. Influencers like Mikayla Nogueira (11.3 million followers) and Brad Mondo (8.7 million followers) have partnered up with the brand, and there is a treasure trove of videos reviewing its insanely popular Leave-In Molecular Repair Hair Mask . It's been compared to Olaplex , featured in stunning before and afters, and been given the 60-second review treatment. Yeah, people love it — but at $75, it's significantly more expensive than its competition.
So, what separates K18 from traditional bond-building products? Is it a mask or a leave-in conditioner? Which hair types can use it, and how do you use it? With the help of some cosmetic chemists and several hairstylists, here's everything you need to know about K18 before you reach for it.
Think of your hair as a ladder that is made up of bonds. Disulfide bonds are the horizontal rungs of the ladder. There are also polypeptide chains that are the sides of the ladder, connecting the rungs vertically. When our hair undergoes any type of damage, those horizontal disulfide bonds can be broken — hence why bond builders have become more popular before, during, and after chemical treatments, explains K18 cofounder and CEO Suveen Sahib of the research he and his team did to create the product. Most bond builders make the outer structure of the hair — the hair cuticle — look smooth, glossy, and less damaged. As for the vertical polypeptide chains, though, they cannot be patched or "glued" together, which is where K18 comes in.
K18 works at a deeper level to molecularly change and repair the polypeptide chains that have been broken, as well as reconnecting the disulfide bonds. "K18 replicates the entire structure of these polypeptide chains," says Sahib. "When they break, [K18] goes in there and reconnects them as if they weren't damaged, bringing the chains back to the state that they were before they got chemically damaged. It mimics the structure."
This is why the brand refers to itself as "biomimetic hair care" – biomimetic meaning "mimicking biochemical processes," as it works to restore the hair's original structure. We sent Orlando-based cosmetic chemist Krupa Koestline a list of K18's ingredients, and she notes the "usual suspects" when it comes to ingredients found in hair care, such as quaternary ammonium salts, fatty acid alcohols, amino acids, and polymers. "I also see alcohol listed as a second ingredient on all of these, which can be drying to hair if it is not formulated properly," she points out.
Javon Ford , a cosmetic chemist based in Los Angeles, mentions that the inclusion of ingredients like dicaprylyl ether (which is emollient) and fatty alcohols balance the hair so it isn't drying or stripping to any hair type. Ford was also interested to see dicaprylyl ether included on the ingredient list. "It's this superlight, silky emollient, and silicone alternative that's easily absorbed into the hair shaft without leaving a greasy feel. It definitely plays a role in how the product feels and performs," he explains. "Ethers aren't used enough in hair care." He says that ethers are lighter and generally have a lower molecular weight, which allows them to be absorbed by the hair cuticle versus sitting on top of it.
Both Ford and Koestline could not confirm how deep K18 actually penetrates based on the ingredient list alone, but Koestline states that both this and Olaplex's repair disulfide bonds; Ford mentions K18's bond builder is based on peptides while Olapex's is based on a modified version of maleic acid. "Maleic acid is an organic acid (like alpha and beta hydroxy acids) that's been demonstrated to strengthen hair bonds and prevent future damage," says Ford. "I mention it because Olaplex's patents not only protect its maleic acid-derived bond builder (bis-aminopropyl diglycol dimaleate) but also prevent any copycat bond builders from using maleic acid."
Ford further explains that K18's bond builder is based on short chains of amino acids (peptides) that are already present in the hair, so it's a different mechanism. "No studies have been done comparing the two, so the best approach is to try both out and see if your hair likes it and whether or not you notice a difference versus using a nice hair mask," he notes.
One common gripe from professionals and consumers (and also this writer) is that hair-care treatments tend to take up a lot of time and require a fresh shampoo to start. Then, you apply your treatment and wait 10 to 20 minutes for it to take effect before rinsing the product out. Or, if it's something you use after the shower, your entire head has to be saturated with product for it to take effect. Add on some extra time if you've got to detangle first.
K18's hair mask is similar to a leave-in conditioner in how it's used. You shampoo your hair, forgo traditional conditioner, then use a pump (or more, depending on hair length and density) of K18 on towel-dried hair, prior to styling. The only crucial instruction is to evenly distribute the product and allow it to work four minutes
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