Frequently Asked Questions
Everything you need to know about your hair renewal journey
How does the K18 peptide technology work?
Our patented K18Peptide™ travels into the inner-most layers of hair to reach the core polypeptide chains, reconnecting broken bonds caused by bleach, color, and heat for lasting strength and elasticity.
Do I need to use conditioner with the Leave-In Molecular Repair Mask?
For best results, do not use conditioner before applying the mask. The mask needs to penetrate the hair cuticle without any barrier. You can apply a leave-in conditioner after the 4-minute wait time if needed.
How long does shipping take for domestic orders?
Standard shipping typically takes 3-5 business days. You will receive a tracking number via email as soon as your order leaves our warehouse.
What is your return policy?
We offer a 30-day satisfaction guarantee. If you are not completely happy with your purchase, you can return the product for a full refund, minus shipping costs.
Are K18 products vegan and cruelty-free?
Yes, all K18 products are 100% vegan, cruelty-free, and color-safe. We do not test on animals and our formulas do not contain any animal-derived ingredients.
Can I use K18 if I have professional extensions?
Yes, K18 is safe for extensions as long as it is applied to the natural hair and the extension hair, avoiding the actual attachment points (bonds or tape) to prevent slipping.