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A Look Behind the Scenes: The Inspiration and Science Behind Our Hair Care Products
A Look Behind the Scenes: The Inspiration and Science Behind Our Hair Care Products https://i0.wp.com/www.number4hair.com/wp-content/uploads/2023/06/The-Inspiration-and-Science-Behind-Our-Hair-Care-Products.jpg?fit=546%2C450&ssl=1 546 450 Number 4 High Performance Hair Care //www.number4hair.com/wp-content/uploads/2017/11/number-4-hair-logo.pngBONJOUR DAH-LING!
At Number 4, we believe hair care should be as luxurious and practical as it is safe and natural. That’s why our botanical hair care products are made with plant-based ingredients, free from parabens, sulfates, and phthalates—allowing you to enjoy the highest-quality professional hair care without worrying about toxins and other nasties.
Inspired by exquisite French style and culture, each collection and individual product is about so much more than high performance. We’re just as influenced by fashion, science, art, music, and industrial design as we are by high-quality ingredients

What sets Number 4 apart from the competition?
But what really sets us apart is our passion for innovation and scientific research.
We take pride in continual exploration and experimentation, ensuring each product contains only the best ingredients with proven results.
Our products are developed and tested by a team of leading scientists with decades of experience in cosmetology, botany, and dermatology.
This research informs the core of our product line—from shampoos to conditioners to styling products—bringing you effective solutions for any hair type or concern. This approach is designed to give you the most luxurious and transformative results, regardless of your hair care needs.
Number 4 Liquid Complex Culture
At Number 4, we are particularly proud of our Liquid Complex Cultures. Taking the science of hair care to a new level, this liquid-based technology uses a combination of natural ingredients to penetrate deep into the hair’s cortex. With four different complexes, whether your goal is vibrance, vitality, defense of purity, our potent, high-performing formulas deliver everything your hair requires to enjoy an extraordinary experience.
From improved moisture retention and elasticity to increased color retention and vibrancy while protecting your hair from environmental damage, behind the scenes our formulas are working hard on your behalf.
Whether you’re looking to add shine, manage frizz, preserve color vibrancy, or simply keep your locks hydrated and healthy, our Liquid Complex Cultures pave the way for superior results.
Discover more about our Liquid Complex Culture.
Healthy hair starts with nourished strands
At Number 4, we believe that beautiful hair starts with healthy, nourished strands. That’s why we craft each product with tender loving care, using safe ingredients and rigorous science to bring you the best in botanical hair care.
Our mission is to leave your hair feeling softer, healthier, and more beautiful than ever before.
Drawing inspiration from nature and its bountiful botanicals
We’ve done extensive research to create our line of hair care products, seeking out the most beneficial ingredients from around the globe.
From exotic flower extracts to rare herbs, we have sought out the best nature has to offer and combined it with science to create a truly unique and effective range of professional hair care products. Black currant, yerba mate, hibiscus, mangosteen and oolong tea are just some of the exceptional ingredients you’ll discover.
Our scientists have carefully formulated each product in our range to ensure that they are compatible with every hair type and provide superior results.
Our products contain natural ingredients such as keratin, argan oil, and coconut oil, leaving your hair feeling soft and nourished. They also feature advanced technologies such as hydrolyzed proteins, amino acids, and antioxidants to promote strong and healthy-looking hair.
Rigorous testing but never on animals
We’ve taken the time to develop and test each product in our range so that you can trust that it will give you the best results possible. Our botanical-infused products are paraben free, sulfate free, and cruelty free, making them gentle yet effective on your hair. With our professional hair care products, you can trust that your hair will look and feel its best dah-ling.
At Number 4, we take great pride in the inspiration and science behind each of our products. We believe that nature knows best when it comes to caring for your hair. We strive to bring you the most luxurious and hard-working, results-driven hair care products on the market.
Here’s what you’ll never find included in the Number 4 range
- Parabens
- Sulfates
- Phthalates
- DEAs
- Formaldehyde or Formaldehyde-releasing agents
- Petrochemicals
- Butylene Glycol
- Synthetic colors or fragrances
- Animal byproducts or animal testing of any kind
We hope you feel inspired to try our professional hair care products for yourself dah-ling. So why not go ahead and browse our website and shop now to experience stunning hair care results?
Sparkle Tafao –
Have tested this product on client after client. I work in the fashion industry doing hair for some of the major clothing brands that you know and love. Many models arrive with tangled hair. I use Super comb prep and I get so many products in one. It delivers conditioning, healthy hair, detangles, and helps the styling process. I spray a couple pumps of this comb and detangles the hair and add Thermal styling spray for heat protectant and to hold the curls in place. Perfect combo! The added plus is the products smell so great.
Nicole Fisher –
This product works great as a leave in conditioner. A little goes a long way. I absolutely love the smell!!!
Melissa –
I got a sample of this from birchbox. I loved it. I Tangle really easy this stuff made it very easy to brush my hair.
Melissa Austin –
I received a sample of this in my Birchbox and loved it. It made my hair really smooth without being super greasy, which products like this tend to do with my hair. I don’t necessarily have a huge tangle issue but it kept my hair really soft.
Ursula Ball –
I was first introduced to your products via Birchbox..shampoo,conditioner, and style aids!! I feel the most important product will be Super Comb and Protect from UV rays, heat damage, and condition protection plus the comb that comes with it!! Whatever style after shampoo & condition, you got to protect your hair first!!
Stephanie –
I absolutely love this spray! I got a sample of it in a subscription, and it’s absolutely phenomenal. The smell is amazing, and I love that it protects my dyed red hair from both the flat iron and from fading in the sun.
Kristi –
I received this in my Birchbox and absolutely love it! My daughter always wants to use my special spray and on special occasions I let her. This makes my thick wavy hair feel amazing and the tangles fall right out! And that smell! I love the smell probably my favorite thing about it! Thank you for such an amazing product!
Candi –
I simply cannot do without Super Comb Prep & Protect. My hair was really showing the effects of blow drying, straightening, sun damage, and age-but this product restores my hair every time. On the rare occasion I run out of it, there is a noticeable difference. Also, did I mention I love the smell of it?
Karen Cogburn –
This is all I use when flat ironing or blow drying. Perfect protection for damaged hair. It smells lovely also. Many compliments since using. Recommend to friends & family.
anakrmz89 –
I was never a fan of detanglers until I received this as a sample. I used heavy leave in conditioners and my hair was greasy by the end of the day. This Supercomb Prep and Protect is magic in a bottle! It’s weightless, the fragrance is light and my hair is so soft after I use it! This is definitely a staple to my hair routine now!
Marissa Ramirez –
Thanks to Birchbox, I have fallen head I’ve heels for this leave-in conditioner! I received a sample in my Birchbox and had to have a full-size. The smell is amazing, but the way it has transformed my hair is even more amazing. I will never use another leave-in!
mrpurifoy –
I can’t say enough good things about this! It smells divine. It does not weigh down my fine hair. It de-tangles, protects my color and protects from heat. Divine!!!!
Mags –
Smells SO GOOD! I love this leave in conditioner. It leaves my hair soft, easy to brush, and smelling great. Curly hair friendly, too!
calypso –
I discovered this product in my Birchbox and have been in love ever since! Its perfect protection for my hair for blow drying or heat styling! And as an added bonus — it smells delightful!!! So thrilled to have discovered this product!
brank4 –
I love this stuff!!! I’m addicted to the smell and how soft it makes my hair!
MelodiM89 –
This stuff is quickly becoming a favorite! It makes my hair super shiny, smooth, and fresh. Love!
mrpurifoy –
I was introduced to your products through my Birchbox. And I have to say that this is my favorite hair product ever!!!! It protects my color and protects from heat and smells like heaven. I recommend all of your products to all of my friends!!!
mlg235 –
I first received this as a sample in my Birchbox subscription, and was so excited to try it out. It did not disappoint! I love having low maintenance looks, and tend to keep my heat styling to a minimum and am always on the look out for great leave-in conditioners. After 5+ years of trying dozens of leave-in conditioners, this is BY FAR my favorite! It was amazed by how shiny, sleek, and smooth it made my hair. I got so many comments after I started using it about how healthy my hair looked!! It is so easy to use, it combs through my hair easily and evenly, and actually seemed to cut down the amount of time I needed to blow dry my hair (which is a MAJOR selling point for me). It’s one of the few Birchbox samples I have actually bought after trying!
kla385 –
I first received a sampe of this in a birchbox subscription. I thought this product was so effective that I’ve repurchased it twiced now. I love the way it smells and how it protects my hair when I’m blow drying it. Now that I’ve discovered this product, I don’t think I could ever go without it.
anything1984 –
Love! Works great in mine and my daughters hair! We both have fine, thin hair. Gives great gloss to our hair without leaving oil residue and helps maintain style throughout day!
kellykaye –
This is the absolute greatest prepping spray for people who have platinum hair! My hair can start looking fried when it gets bleached and then heat styled, however, since I started using Number 4 Super Comb Prep and Protect my hair has been flawless and it looks so healthy!
mrpurifoy –
I use this product every day! It smells delicious and does not weigh my hair down. I extends the life of my color which is priceless. Best product I use!
emboog –
I love using this product when my hair is especially tangled. Easy to comb so there’s no split ends.