Please allow up to two weeks for your refund to appear on your credit card statement, each financial institution varies.

If your order from K18 arrives damaged and/or unusable, please contact a customer service representative at (415) 495-7210 X 101 or at hello@k18hair.com. Our business hours are Monday-Friday from 9am-5pm.

Parabens, Sulfates, Silicones, Phthalates, Sodium Chloride, Artificial Colors, Formaldehyde and Formaldehyde Donors.

Vegan, Cruelty-Free, Color-Safe, and Dermatologically Tested.

K18 Mask: Water (Aqua) (Eau), Alcohol Denat., PropyleneGlycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, BehentrimoniumChloride, Polysorbate 20, sh-Oligopeptide-78, Hydrolyzed Wheat Protein,Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol,Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, HexylCinnamal, Benzyl Alcohol. K18 Mist: Water (Aqua) (Eau), Alcohol Denat., PropyleneGlycol, Polysorbate 20, sh-Oligopeptide-78, Hydrolyzed Wheat Protein,Hydrolyzed Wheat Starch, Acrylates/C10-30 Alkyl Acrylate Crosspolymer,Phenoxyethanol, Potassium Sorbate, Potassium Hydroxide, Fragrance (Parfum),Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.

a. The K18Peptide ™ molecular repair service is a bioactive 2-step in-salon treatment infused with our patented K18Peptide ™. i. K18 Mist - K18 Professional Mist is a pre-service treatment that strengthens hair before a chemical service. The pH level of 7.5-8.0 shifts the cuticle layer to penetrate into hair’s cortex and hone in on damage sites. ii. K18 Professional Mask is a post-service treatment that repairs damage caused during any salon service. With a pH level of 5.0-6.0, the mask helps to close the cuticle and seal in the peptide, with added lightweight conditioning benefits to keep hair smooth and soft. b. K18Peptide™ is the patented molecular breakthrough clinically proven to reverse hair damage (in just 4 minutes) from: - Bleach + Color - Chemical Services - Heat

When hair gets damaged, the polypeptide chains (keratin chains) that make up the inner structure of hair strands become weakened and break. For context, there are billions and billions of polypeptide chains (keratin chains) in a single strand of hair. When these are damaged, hair’s core structure responsible for elasticity and strength becomes compromised and as a result it loses its resiliency and shine—or the look and feel of healthy hair. After spending a decade in the lab scanning and testing all amino acid sequences across the entire keratin genome that makes up human hair searching for a breakthrough, we discovered one unique sequence (a bioactive peptide) that brings damaged hair back to its original, youthful state. This is our K18Peptide™. Traveling deeper into the inner layers of hair than traditional repair products, our revolutionary peptide is just the right size and makeup to fit in and reconnect those broken polypeptide chains (keratin chains). And because our peptide is a bit of an overachiever, as a result of this reconnection, any disturbed disulfide bonds are also re-conformed. Our peptideemploys biomimetics to get the job done. To put it simply: Biomimetics is the practice of learning from and mimicking nature. Mimicking the natural structure of keratin building blocks (amino acid sequences), our K18 bioactive peptide is recognized as natural by the hair. It’s not washed away by water or shampoo like traditional bonding agents either, making K18 a genuine, lasting solution for damaged strands.

Our patented peptide is a unique sequence of amino acids that travels deep into hair’s core structure to fit in and reconnect broken polypeptide chains (keratin chains) responsible for hair strength and elasticity. An Analogy: When building proteins, the order of the amino acids determines the kind of protein and its properties, much like the way letters are arranged to make meaningful words and sentences. In the same way the order and where each word sits in a sentence leads to its overall meaning, K18 is the magic word that fits right in, integrating itself with the keratin chains as the hair recognizes it as a natural building block.

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Yes. All formulas are optimized to be the best delivery system to get the peptide where it needs to go.

K18 is safe to use on all hair types and textures, all generations and was made to be used on all types of damage.

K18 Mist is a lightweight mist that strengthens hair and repairs existing damage before a chemical service. It’s clinically proven to repair damaged hair after just one 4-minute in-salon treatment. The slightly alkaline pH of 7.5-8.0 is designed to shift the cuticle layer, quickly penetrate the hair’s cortex, and hone in on damaged sites. From there, K18Peptide™regenerates and restores hair’s strength and elasticity. This allows hair to withstand damage occurring during the chemical service.

K18 Professional Mask is a post-service treatment that repairs damage caused during any salon service and can be used as an at-home treatment for clients to control ongoing damage. With a pH level of 5.0-6.0, the mask helps to close the cuticle and seal in the peptide, with added lightweight conditioning benefits to keep hair smooth and soft. The mask is clinically proven to renew damaged hair after just one 4-minute treatment.

K18 is safe to use on all hair types and textures, all generations, and was made to be used on all types of damage.

We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Our unique blend of 3 alcohols function to open up the hair cuticle so the K18Peptide ™ can penetrate the inner most layer of hair, reaching the broken polypeptide chains (keratinchains). Here the alcohol serves as an agent to optimize the hair environment for K18 to work on a deeper level.