K18 Peptide Prep Detox Shampoo 250ml is a clarifying detox shampoo from the cult American haircare brand. Built around activated charcoal, salicylic acid and K18Peptide, it's designed to remove product buildup, excess oils and metals without stripping the hair — preparing the lengths for the brand's signature K18 leave-in repair treatment.
About K18
K18 is the American haircare brand co-founded in 2020 by Suveen Sahib and Britta Cox, built around its patented bioactive K18Peptide. The brand became a viral hit through professional hairdressers who saw repeatable, dramatic improvements on damaged hair — and is now stocked across professional salons and prestige beauty retailers worldwide.
Key benefits
- Clarifying detox shampoo — removes product buildup, oils, dirt and metals.
- pH-optimised, non-stripping formula that doesn't dry out the lengths.
- Colour-safe — suitable for use on coloured and chemically-treated hair.
- Activated charcoal absorbs toxins and excess oils.
- Salicylic acid clears sebum buildup without stripping essential moisture.
- K18Peptide acts as a protective shield to reduce protein loss.
- Vegan, gluten-free and cruelty-free per the brand.
Key ingredients
- Activated charcoal: absorbs product buildup, excess oils and impurities.
- Salicylic acid: beta-hydroxy acid that clears sebum buildup gently.
- K18Peptide (sh-Oligopeptide-78): the brand's patented active — protects the hair fibre from protein loss during cleansing.
- Panthenol (provitamin B5): supports softness and shine.
Who it's for
Anyone with product buildup, residue from hard water, swimming-pool chlorine, or metal exposure — particularly those preparing the hair for the K18 Leave-In Molecular Repair Hair Mask. Use as needed, typically every 1-2 weeks, in place of regular shampoo.
How to use
- Wet the hair thoroughly in a warm shower.
- Dispense a generous amount of shampoo into the palms.
- Massage onto the scalp and through the lengths, working into a rich lather.
- Leave on for 1-2 minutes for the salicylic acid and charcoal to work.
- Rinse thoroughly with warm water.
- Follow with the K18 Leave-In Molecular Repair Hair Mask for best results.
Specifications
- Brand: K18
- Product: Peptide Prep Detox Shampoo
- Format: 250ml shampoo
- Use: 1-2 times per week as a clarifying step
- Vegan and cruelty-free: Yes (per brand)
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