Login
New to K18 Hair?
Checkout faster, view your order history & be the first to hear about new product launches!
shop now
"Bio-Molecule Repair™ Products
More to Know
Do’s and Dont’s
Key Benefits
As seen in
Four Reasons
Bio-Molecule Repair™ Serum
$36.90 | 100 ml
$36.90
- Description
- Ingredients
- How to use
Four Reasons Professional Bio-Molecule Repair™ Serum is your on-the-go hair hero. This lightweight, leave-in formula is packed with advanced BMR-technology, clinically-proven to repair and protect hair. Designed to shield hair from heat, environmental stress, and chemical treatments, it smooths frizz, locks in moisture, and adds a glossy shine for a sleek, manageable finish. Ideal for daily use, it keeps your hair looking vibrant and feeling strong, no matter what the day throws at you. Perfect for all hair types!
Repairs damage caused by
-
Bleaching
-
Heat tools
-
UV rays
Key Ingredients:
Full ingredients
See More
See Less
PAIRS WELL WITH
Bio-Molecule Repair™ Shampoo
Bio-Molecule Repair™ Treatment
Cruelty free
& Vegan
Recyclable materials for
packaging
European quality
& reliability
Sustainable manufacturing
practices
FAQs
Frequently Asked Questions
What is Bio-Molecule Repair™ technology?
Bio-Molecule Repair™ technology is an advanced hair care solution that works on three levels to maintain, protect, and repair your hair. It balances moisture with mineral salts and biopolymers, shields your hair from free radicals with antioxidants, and repairs protein structures with amino acids, to help you achieve healthy and strong hair.
How Often Should I Use Bio-Molecule Repair Hair Products?
Bio-Molecule Repair™ Protect Spray is a professional product that should only be used in the salon by a professional hair stylist, with a chemical treatment, or as a stand-alone treatment. You can use Bio-Molecule Repair Shampoo, Treatment and Serum at home as often as you like, without worrying about buildup. For best results, use the Bio-Molecule Repair Serum after every wash to protect your hair and keep it smooth and manageable.
Are Four Reasons Bio-Molecule Repair™ Hair Products Vegan?
Yes, all Four Reasons Bio-Molecule Repair™ hair products are 100% vegan and cruelty-free. We believe in taking care of your hair without harming animals or the environment.
Are Bio-Molecule Repair™ Hair Products Safe for All Hair Types?
Yes, our Bio-Molecule Repair™ products are safe for all hair types. Bio-Molecule Repair hair products are particularly beneficial to bleached, colored, and chemically treated hair, helping to repair and protect it.
How Long Does It Take to See Results from Using Bio-Molecule Repair™ Hair Products?
You’ll notice smoother, more resilient, and shinier hair immediately, after the first use. With regular use, your hair will become stronger and less prone to breakage.
Testimonials
Why You'll love Bio-Molecule Repair™
“Immediately softer, smoother hair!”
“In a class of its own.”
“Instant change.”
“Quick, effortless, reduces tangling.”
Feel the difference
At the top of hair technology
The innovation Four Reasons Bio-Molecule Repair™ Protect Spray is a unique tool for all chemical treatments done in the salon. The Bio-Molecule Repair™ line’s shampoo, intensive treatment, and serum complete the treatment both in the salon and at home.
How Bio-Molecule Repair™ compares
See how our groundbreaking technology stacks up against traditional
bond-building and peptide-based products.
Bio-Molecule Repair™
Bond Building
Peptide-Based
Hair Bond Protection
Yes
Yes
Partial
Cuticle Preservation
High
None
None
Breakage Reduction
Yes
Yes
Moderate
Shine Enhancement
High
Moderate
Moderate
Hair Strengthening
High
Moderate to High
Moderate
Feel the difference
Four Reasons Professional Bio-Molecule Repair™
It’s time to protect and repair hair with technology that
considers the hair in its entirety.
Four Reasons Professional Bio-Molecule Repair™ line products
protect, repair, and maintain the function of the cuticle layer and
repair internal damages of the hair so that the difference can be felt
and seen.
Discover Bio-Molecule Repair™ products
M
Soft and Nourishing ![User picture]()
Only used it a few times so far, but the Bio Serum really helps make my hair feel soft and nourished.
O
Love
After a beach vacation, my hair was a messdry, frizzy, and seriously sun-damaged. I was so frustrated that I was ready to chop it off! A friend recommended the Bio Repair Serum, and I gave it a shot as a last-ditch effort. I could feel a difference right after the first use! My hair felt smoother, the frizz was tamed, and it had this lightweight, soft texture that I hadnt felt in ages. By the end of the week, my hair looked healthier than it did before the beach trip. Im never going back to regular serums again.
L
Incredible Definition and Shine ![User picture]()
Curls look instantly more defined after applying this serum. I’ve used it on both myself and my clients, and the results are always healthier-looking, shinier hair. Every time I finish a client’s service, their hair has an unbelievable glow—I’m truly impressed!
D
Great product ![User picture]()
My hair looked so flat from all the straightening. After using this serum before blow-drying, it actually got a nice shine and felt stronger. So happy with it!
Z
Obsessed with This! ![User picture]()
I love this serum so much! It revived my color-treated hair, making it super soft and strong. Plus, my hair is growing so much faster!
