Fragrance-Free
Fragrance-Free

The Scalp Duo | Hyaluronic Acid

4.4
Rated 4.4 out of 5 stars
645 Reviews

The Necessary™ | Care For Your Body™ | Care For Your Planet™

Treat Your Scalp Like Your Skin™. 

The Scalp Duo is a 2-step clinical system for scalp and hair health. The Shampoo and The Conditioner are infused with Hyaluronic Acid, Vitamin B3, Vitamin B5 and ApiScalp to balance a dry, sensitive scalp and support follicle health. No Sulfates. No Phthalates. No Parabens. No PEGs. No Silicones. Color-safe. Keratin-Safe. Fragrance-Free.  Both formulas hold The Seal of Approval by The National Eczema Association. 2 x Full-Size.

Clinical Perception Study | The Hair Essentials. 50+ participants used The Shampoo, The Conditioner and The Scalp Serum for 90 days. USA 2022. Topline below.

  • 90% Saw Thicker Hair
  • 94% Saw Fuller Hair
  • 96% Saw Healthier Hair

$56

Free US Shipping $75+ | Free Returns

The Necessary™ | Care For Your Body™ | Care For Your Planet™

Treat Your Scalp Like Your Skin™. 

The Scalp Duo is a 2-step clinical system for scalp and hair health. The Shampoo and The Conditioner are infused with Hyaluronic Acid, Vitamin B3, Vitamin B5 and ApiScalp to balance a dry, sensitive scalp and support follicle health. No Sulfates. No Phthalates. No Parabens. No PEGs. No Silicones. Color-safe. Keratin-Safe. Fragrance-Free.  Both formulas hold The Seal of Approval by The National Eczema Association. 2 x Full-Size.

Clinical Perception Study | The Hair Essentials. 50+ participants used The Shampoo, The Conditioner and The Scalp Serum for 90 days. USA 2022. Topline below.

  • 90% Saw Thicker Hair
  • 94% Saw Fuller Hair
  • 96% Saw Healthier Hair

Free US Shipping $75+ | Free Returns

SET CONTAINS

1

Fragrance-Free
See Ingredients

2

Fragrance-Free
See Ingredients

Full Ingredients

Aqua/Water/Eau
Sodium Lauroyl Methyl Isethionate
Aloe Barbadensis Leaf Juice
Cocamidopropyl Betaine
Sodium Methyl Oleoyl Taurate
Sodium Cocoyl Isethionate
Propanediol
Niacinamide
Sodium Hyaluronate
Panthenol
Apium Graveolens (Celery) Seed Extract
Persea Gratissima (Avocado) Oil
Glycerin
Disodium Cocoyl Glutamate
Caprylic/Capric Triglyceride
Citric Acid
Caprylhydroxamic Acid
Sodium Chloride
1,2-Hexanediol
Caprylyl Glycol
Sodium Benzoate

For the most complete and up-to-date list of ingredients, please refer to the product packaging.

Full Ingredients

Aqua/Water/Eau
Cetearyl Alcohol
Glycerin
Cocos Nucifera (Coconut) Oil
Aloe Barbadensis Leaf Juice
Caprylic/Capric Triglyceride
Behentrimonium Methosulfate
Persea Gratissima (Avocado) Oil
Niacinamide
Panthenol
Sodium Hyaluronate
Apium Graveolens (Celery) Seed Extract
Cetyl Hydroxyethylcellulose
Citric Acid
Caprylhydroxamic Acid
1,2-Hexanediol
Caprylyl Glycol
Disodium Phosphate
Hydrated Silica
Propanediol
Silica Dimethyl Silylate
Sodium Phosphate

TARGETS

Scalp Dryness
Scalp Sensitivity

INGREDIENTS

Hyaluronic Acid
Vitamin B3
Vitamin B5
ApiScalp

TESTED

  • Hypoallergenic
  • Dermatologist-Tested
  • Non-Comedogenic

FOOTPRINT

  • 1% For The Planet
  • Certified B Corp
  • Certified Climate Neutral
  • Certified Plastic Neutral
  • Certified Vegan
  • Cruelty-Free
  • FSC-Certified
  • How2Recycle

USAGE

See Usage

AWARDS

2022 Allure Best Of Beauty
2023 SELF
2021 OK!

See Awards
Why is The Hair Duo fragrance-free?
The Shampoo and The Conditioner are offered in a Fragrance-Free option. Essential Oils, Natural - and Synthetic Fragrances can cause scalp irritation for some. The Shampoo and The Conditioner (Fragrance-Free) are awarded the Seal Of Acceptance By The National Eczema Association. The Shampoo and The Conditioner are Hypoallergenic, Dermatologist-Tested, and Non-Comedogenic.

Answer

How do I use The Hair Duo set?
The Hair Duo is designed as your everyday scalp and hair care system. On wash day, use The Shampoo and The Conditioner as your cleanse and condition ritual. Massage The Shampoo onto wet scalp and hair. Rinse well. Follow with The Conditioner. Massage The Conditioner onto wet scalp and hair. Rinse well.

Answer

Is The Hair Duo set color-safe?
The Shampoo and The Conditioner are formulated with ingredients that are safe for color-treated hair. The Shampoo and The Conditioner are formulated without Alcohol, Silicones, Sulfates, Phthalates, Parabens, PEGs, or Synthetic Fragrance. The Shampoo and The Conditioner are Hypoallergenic, Dermatologist-Tested and Non-Comedogenic. Please note Nécessaire has not run a formal panel test on color-treated hair.

Answer

Is The Hair Duo set pregnancy-safe?
At Nécessaire we formulate without ingredients on the EU's prohibited substances list (Regulation No.1223/2009, Annex II). All of our products are Hypoallergenic, Dermatologist-Tested, and Non-Comedogenic. If you have any specific questions or concerns, we recommend consulting your doctor.

Answer

Is The Hair Duo set gluten-free, soy-free and nut-free?
The Shampoo and The Conditioner are not certified gluten-free, soy-free or nut-free. Nécessaire is manufactured in a facility where gluten, soy and nuts may be used. If you have an allergy to gluten, soy or nuts, we recommend that you do not use these products. If you still wish to try, please consider a patch test.

Answer

4.4
Rated 4.4 out of 5 stars
Based on 645 reviews
Total 5 star reviews: 467 Total 4 star reviews: 59 Total 3 star reviews: 46 Total 2 star reviews: 34 Total 1 star reviews: 39
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645 reviews
  • Nix
    Verified Buyer
    The Scalp Duo | Hyaluronic Acid
    Reviewing
    The Scalp Duo | Hyaluronic Acid
    I recommend this product
    What are your skin concerns? Uneven Skin/Spots, Discoloration, Ingrowns, Acne
    What are your hair concerns? Frizz, Dryness
    Rated 5 out of 5 stars
    12/11/24
    Curly hair approved!

    I was skeptical about buying this shampoo and conditioner because I have thick curly hair (3c/4a) but I I decided to give it a chance. I was pleasantly surprised at how clean my hair felt afterwards, especially because of all the product I use daily. The conditioner softened my hair and I followed it up with up with other products and it was perfect.

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  • Rebecca
    The Shampoo | Hyaluronic Acid
    Reviewing
    The Shampoo | Hyaluronic Acid
    I recommend this product
    Rated 5 out of 5 stars
    12/6/24
    5 Stars

    I love Nécessaire products, as I use the Rosemary shampoo and conditioner myself, but I got this one for my partner. It turned his hair so soft and healthy that I may never go back! It also made his beard softer as well.

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  • Dara
    The Shampoo | Hyaluronic Acid
    Reviewing
    The Shampoo | Hyaluronic Acid
    I recommend this product
    Rated 5 out of 5 stars
    12/4/24
    5 Stars

    Absolutely love this shampoo. I have sensitive scalp. This is the only shampoo that does not make my scalp itchy and I can go 2 days without shampooing. Finally found my shampoo.

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  • priti
    Verified Buyer
    The Shampoo | Hyaluronic Acid
    Reviewing
    The Shampoo | Hyaluronic Acid
    I recommend this product
    What are your skin concerns? Eczema/Psoriasis
    What are your hair concerns? Thinning, Damage, Frizz
    Rated 5 out of 5 stars
    12/3/24
    Amazing.

    I have been searching for a fragrance free shampoo as my son has an Eczema. This is it.My search is over.It leathers so beautifully and very gentle to the scalp. More than the product itself,their customer service is very impressive.Thanks Necessaire for bringing a fragrance free product and please don't ever discontinue this product.

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  • BRIS
    Verified Reviewer
    The Conditioner | Hyaluronic Acid
    Reviewing
    The Conditioner | Hyaluronic Acid
    I recommend this product
    What are your hair concerns? Thinning, Dryness, Frizz, Damage
    Rated 5 out of 5 stars
    11/22/24
    OMG

    I CAME HERE SINCE I CAN'T FIND A WAY TO LEAVE A REVIEW ON SEPHORA SINCE I PURCHASED IT FROM THEM FOR DAYS I HAVE BEEN WITH A FEELING OF SHARING MY SINCERE EXPERIENCE WITH THIS CONDITIONER I HAVE BEEN HAVING A LOT OF HAIR LOSS FOR THREE YEARS AND I HAVE TRIED EVERYTHING AND NOTHING. BUY KERASTASE, K18, VEMAOUR, OLAPLEX TREATMENTS FOR LOSS ETC I GET GOOD RESULTS BUT SHORT TERM BUT IT WAS NOT THAT AMAZING MHHH.... UNTIL ONE DAY BROWSING IN SEPHORA I SAW THIS AND READ CAREFULLY WHEN I SAW ITS INGREDIENTS I SAID THIS WILL WORK AND IF IT WORKED, I DETERMINED THAT MANY TIMES HAIR LOSS IS NOT ONLY BAD NUTRITION, STRESS, BUT THE LACK OF A GOOD CONDITIONER THAT MOISTURIZES THE HAIR AND STOPS BREAKING NECESSAIRE PLEASE DO NOT CHANGE WHAT YOU HAVE ALREADY DONE FOR EXCELLENCE

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