K18 Biomimetic Hairscience is a leave-in molecular repair treatment, not a conditioner. Its K18Peptide is designed to reconnect broken keratin chains inside the hair, so it targets damage from bleach, color, heat and everyday wear rather than coating the surface. You apply it to clean, towel-dried hair and leave it in for four minutes before styling. It suits people with chemically or heat-damaged hair who want bond repair without a salon visit. Against bond builders like Olaplex No.3, it is a single leave-in step with no rinse-out and no follow-up conditioner, but it is a small bottle used in tiny amounts and the results build over repeated use rather than one wash.
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Lowest price we've seen: $18.46 on Nov 13 at Walmart. Tracked across 13 stores since Nov 13.
Ratings are high, and owners most often credit it with softer, stronger hair after bleaching and heat damage. Many say it took several weeks of regular use to notice the change, and some found it left hair stiff or weighed down.
K18 Biomimetic Hairscience is a leave-in hair repair treatment. It uses the biomimetic K18Peptide™ to repair damage at the molecular level by reconnecting broken keratin chains. It targets damage from chemical services, heat styling and environmental stress.
The formula is lightweight and smooth. It absorbs quickly without leaving residue and leaves hair with a soft, silky feel. It is made to strengthen and add elasticity, which reduces breakage, and visible results appear in 4 minutes.
It is intended for damaged, bleached or chemically treated hair, as well as weak, brittle or over-processed hair. It suits all hair types.
