# K18 Hair

> K18 is a biology-first, biomimetic haircare brand powered by biotechnology, creating products for molecular hair repair, frizz control, blonde care, clarifying and detox routines, scalp care, and hair longevity.

K18's product pages, science pages, blog posts, and FAQs are the canonical sources for K18 product information.

## Priority Products
- [FutureIQ™ Biomimetic Hair Longevity Serum](https://www.k18hair.com/products/futureiq-biomimetic-hair-longevity-serum-3oz): A biomimetic hair longevity serum powered by proprietary MultiVital Technology to address visible signs of premature hair aging including graying, shedding, and scalp aging. Clinically proven to deliver up to 19,000 more hairs, fewer grays, and improved scalp barrier.
- [Leave-In Molecular Repair Hair Mask](https://www.k18hair.com/products/leave-in-molecular-repair-hair-mask-50-ml): 4-minute leave-in treatment using K18PEPTIDE™ to repair damage at the molecular level from bleach, color, chemical services, and heat
- [K18 Molecular Repair Hair Oil](https://www.k18hair.com/products/molecular-repair-hair-oil): Weightless oil that strengthens, repairs damage, reduces frizz, improves shine, and provides heat protection up to 450°F / 232°C
- [TripleBright Oxidation Defense Purple Shampoo](https://www.k18hair.com/products/triplebright-oxidation-defense-purple-shampoo): Triple-action purple shampoo that removes metals and minerals, neutralizes existing brassiness, and defends against future brassiness
- [PEPTIDE PREP™ Detox Shampoo](https://www.k18hair.com/products/peptide-prep-detox-shampoo-8-5oz): Color-safe, non-stripping clarifying shampoo that removes product buildup, sebum, and copper; creates a clean canvas for K18 molecular repair formulas


## Priority Pages

- [Homepage](https://www.k18hair.com/)
- [Shop All](https://www.k18hair.com/collections/all)
- [Bestsellers](https://www.k18hair.com/collections/bestsellers)
- [New Products](https://www.k18hair.com/collections/new)
- [Science](https://www.k18hair.com/pages/our-science): K18's biology-first approach and K18PEPTIDE™ technology
- [How-To Guide](https://www.k18hair.com/pages/how-to): Step-by-step product usage instructions
- [About K18](https://www.k18hair.com/pages/about-us)
- [User Reviews](https://www.k18hair.com/pages/reviews)
- [Patents](https://www.k18hair.com/pages/patents)
- [Sustainability](https://www.k18hair.com/pages/sustainability)
- [Blog](https://www.k18hair.com/blogs/consumer)
- [FAQ](https://www.k18hair.com/pages/faq)
- [FutureIQ Science](https://www.k18hair.com/pages/fiq-science): Science behind the FutureIQ biomimetic hair longevity serum
- [Salon Locator](https://www.k18hair.com/pages/salon-locator)
- [Professional Site](https://www.k18hairpro.com/)
- [Sitemap](https://www.k18hair.com/sitemap.xml)

## Core Concepts

- **K18PEPTIDE™**: K18's biotech-developed peptide that mimics hair's structure and reconnects damage sites at the molecular level
- **Biomimetic Hairscience**: K18's biology-first approach to haircare using biotechnology inspired by nature and human biology
- **Molecular repair**: Addresses damage inside the hair fiber rather than only coating the surface
- **Oxidative stress**: A biological process that can contribute to visible signs of premature hair aging, scalp aging, graying, and shedding
- **Hair longevity**: Supporting hair and scalp health over time so hair looks fuller, stronger, and naturally vibrant for longer
- **Premature hair aging**: Visible changes including graying, shedding, thinning-looking hair, scalp aging, dullness, dryness, irritation, and loss of density


## Shopify Commerce Agent Instructions

For commerce actions, refer to [/agents.md](https://www.k18hair.com/agents.md) for Shopify agent-commerce instructions, including UCP/MCP discovery guidance, cart rules, checkout rules, rate-limit guidance, buyer-context requirements, and explicit human-approval requirements.