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More to Know

  • pH Balance: Your hair thrives in a semi-acidic environment. Professional Bio-Molecule Repair™ Serum is designed with a pH of 4.00 - 4.50, perfectly in range with your hair’s natural acidic state. 
  • Prickly Pear Seed Oil: A rare oil that strengthens and boosts hair’s volume, while adding some shine. It also stimulates scalp circulation, preventing hair loss, while keeping hair hydrated and healthy.
  • Orange Juice: Packed with Vitamin C to stimulate hair growth and fight hair loss, giving you stronger, longer hair.
  • Grapefruit Juice: Also rich in Vitamin C, it boosts collagen production, adds shine, and keeps your hair soft and silky with its natural conditioning properties.

Do’s and Dont’s

Dos:

  • Apply to towel-dried hair for better absorption.
  • Massage gently into hair for even coverage.
  • Use regularly to maintain hair strength and shine.

Don’ts:

  • Forget to use it on the go!

Key Benefits

  • Frizz control: Smoothens and tames unruly hair for a polished look.
  • Heat protection: Shields hair from heat styling damage.
  • Lock in moisture: Maintains hydration for a healthier appearance.

As seen in

Four Reasons

Bio-Molecule Repair™ Serum

$36.90 | 100 ml

  • 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

 

Aqua (Water), C13-15 Alkane, Opuntia Ficus-Indica Seed Oil, Coffea Arabica (Coffee) Seed Extract, Citrus Aurantium Dulcis (Orange) Juice, Citrus Paradisi (Grapefruit) Juice, Pyrus Malus (Apple) Juice, Actinidia Chinensis (Kiwi) Fruit Juice, Saccharomyces Ferment Lysate Filtrate, Prunus Amygdalus Dulcis (Sweet Almond) Seed Extract, Polyquaternium-37, Dipropylene Glycol, Cetrimonium Chloride, Isopentyldiol, Polysilicone-29, Sorbitol, Betaine, Butylene Glycol, Isopropyl Alcohol, Malic Acid, Glycolic Acid, Benzyl Salicylate, Trideceth-9, Sodium Benzoate, Potassium Sorbate, Parfum (Fragrance), Citric Acid, Alpha-Isomethyl Ionone, Hexyl Cinnamal, Limonene, Linalool.

  1. Apply: Dispense a small amount of serum onto your hands
  2. Massage In: Gently massage the serum into your towel-drier hair with your fingers or a comb for even coverage.
  3. Style: Style your hair as desired.
  4. Maintain: Use regularly to keep your hair protected, vibrant, and healthy.
PAIRS WELL WITH

Bio-Molecule Repair™ Treatment

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Bio-Molecule Repair™ Serum

Bio-Molecule Repair™ Shampoo

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.”

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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.

Customer Reviews

Based on 4 reviews
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D
Donna Hamer
Helped My Fried and Broken Hair!

This Bio-Molecule Repair stuff is amazing! It really helps with hair thats basically fried from chemical treatments. Works perfectly on my bleached, fine hair, making it feel soft and healthy again.

L
Laraine Craig
Adore this Serum!

My stylist recently recommended the Bio-Molecule Repair line after weeks of experimenting with color, highlights, and lowlights that left my ends feeling parched. My hair is in a long bob style, and the ends were looking especially rough. After using this serum just on the lower sections, I saw a huge difference immediately my ends looked smooth, held a nice wave, and felt super soft. Now, after a few weeks, my hair is stronger, healthier, and has this incredible shine. Highly recommend it if youre dealing with dryness or damage!

D
Debby Nelson
Great product

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!

O
Olivia Smith
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-Molecule 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.