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The Scalp Serum | 30-Day Supply | 1% Hyaluronic Acid

30 ml / 1 fl oz
4.2
Rated 4.2 out of 5 stars
89 Reviews

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

The Scalp Serum (30-Day Supply) is a foundational fragrance-free serum for the scalp. 1% Multi-Molecular Hyaluronic Acid is paired with Vitamin B3 and Vitamin B5 to help delivers intense multi-level hydration to a dry, sensitive scalp, while also balancing and soothing. This leave-in texture is quick-dry and water-light. It leaves no-residue. The Scalp Serum also contains 5% Capixyl™ to support denser, fuller, healthier-looking hair. The Scalp Serum must be used daily for results. Dermatologist-Tested. Hypoallergenic. Non-Comedogenic. Vegan. Color-Safe. The Scalp Serum holds The Seal of Approval by The National Eczema Association.

Clinical Results | 50+ participants used The Shampoo, The Conditioner and The Scalp Serum for 12 Weeks | USA 2022. Q3.

  • 96% Said My Scalp Feels Hydrated
  • 96% Said My Scalp Feels Less Itchy
  • 94% Said My Scalp Feels Less Flaky


    $48

    30 ml / 1 fl oz
    30 ml | $48 3x 30 ml | $125

    Free US Shipping $75+ | Free Returns

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

    The Scalp Serum (30-Day Supply) is a foundational fragrance-free serum for the scalp. 1% Multi-Molecular Hyaluronic Acid is paired with Vitamin B3 and Vitamin B5 to help delivers intense multi-level hydration to a dry, sensitive scalp, while also balancing and soothing. This leave-in texture is quick-dry and water-light. It leaves no-residue. The Scalp Serum also contains 5% Capixyl™ to support denser, fuller, healthier-looking hair. The Scalp Serum must be used daily for results. Dermatologist-Tested. Hypoallergenic. Non-Comedogenic. Vegan. Color-Safe. The Scalp Serum holds The Seal of Approval by The National Eczema Association.

    Clinical Results | 50+ participants used The Shampoo, The Conditioner and The Scalp Serum for 12 Weeks | USA 2022. Q3.

    • 96% Said My Scalp Feels Hydrated
    • 96% Said My Scalp Feels Less Itchy
    • 94% Said My Scalp Feels Less Flaky


      Free US Shipping $75+ | Free Returns

      BUY IT WITH

      TARGETS

      Scalp Health

      TREATMENT

      Formula Contains:
      1% Hyaluronic Acid
      5% Capixyl™
      Vitamin B3 
      Vitamin B5

      See Ingredients

      TESTED

      Product Is:

      • Dermatologist-Tested
      • Hypoallergenic
      • Non-Comedogenic
      • Certified Vegan 
      • Cruelty-Free
      • EU Compliant

      SCENT

      Fragrance-Free

      TEXTURE

      Liquid

      pH

      4.7 - 5.7

      USAGE

      See Usage

      AWARDS

      2023 Harper’s Bazaar
      2023 Women's Health
      2022 CEW UK | Best Prestige Brand
      2019 NewBeauty Best Unisex Body Brand

      Is The Scalp Serum Oil-Free? Will The Scalp Serum Leave A Residue?

      The Scalp Serum is oil-free. The Scalp Serum is a quick-dry, water-light, and no-residue leave-in serum. The Scalp Serum must be used daily for results. Can be used in damp or dry hair. Fragrance-Free. Dermatologist-Tested. Hypoallergenic. Non-Comedogenic. Vegan. Color-Safe.

      Answer

      Why Is pH Level Mentioned On The Package?

      During the formulation process we optimize the pH of the formula. We believe it directly impacts the safety and efficacy of the formula. The pH objective will vary based on product purpose. On the secondary packaging (carton) we provide a pH range. The reason a pH range is indicated is that pH may vary during the manufacturing process and/or slightly change over time. Formula that does not contain enough water, will not have a pH listed.

      Answer

      Is This Product Certified Eczema-Safe?

      Yes. This product holds The Seal of Approval by the National Eczema Association.

      Answer

      Can I Use The Product If I Am Pregnant?

      We formulate without ingredients on the EU's prohibited substances list (Regulation No.1223/2009, Annex II). This formula is Dermatologist-Tested and Hypoallergenic. If you have any specific concerns, we recommend consulting your doctor prior to use.

      Answer

      Is This Product Certified Gluten-Free, Soy-Free And Nut-Free?

      This product is not certified gluten-free, soy-free or nut-free. This product 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 this product. If you still wish to try, please consider a patch test.

      Answer

      Customers say this lightweight scalp serum has a water-like consistency that absorbs quickly without leaving greasy residue or buildup. Many reviews highlight visible new hair growth, particularly around the hairline and crown, with some noting results after several weeks of consistent use. Frequent comments address reduced scalp dryness, less hair shedding, and improved hair texture and shine. The fragrance-free formula appeals to those with sensitive scalps. Some users report the liquid texture runs during application, and several mention concerns about bottle size relative to price. While most report positive scalp comfort improvements, experiences with hair growth results vary, with some seeing no changes after extended use.
      4.2
      Rated 4.2 out of 5 stars
      Based on 89 reviews
      Total 5 star reviews: 61
      Total 4 star reviews: 8
      Total 3 star reviews: 5
      Total 2 star reviews: 9
      Total 1 star reviews: 6
      Write a Review (Opens in a new window)
      89 reviews
      • Jo
        Verified Buyer
        Reviewing
        The Scalp Serum | 30-Day Supply | 1% Hyaluronic Acid
        I recommend this product
        What are your skin concerns? Eczema/Psoriasis
        What are your hair concerns? Frizz
        Rated 5 out of 5 stars
        7/23/26
        This is great!

        This year I started experiencing itching and bumps on my scalp. I ordered this and have been using it for five days. It has stopped the itching, flaking and the bumps have been reduced. I can't say enough good things about it!

        If you have scalp issues, please buy it, it's worth it!

        Was this helpful?
      • Sheri B. S.
        Verified Buyer
        Reviewing
        The Scalp Serum | 30-Day Supply | 1% Hyaluronic Acid
        I recommend this product
        What are your skin concerns? Eczema/Psoriasis, Aging, Dryness, Acne
        What are your hair concerns? Thinning
        Rated 5 out of 5 stars
        6/30/26
        Amazing

        I have eczema on my scalp, neck and upper back and these products have changed my life. I was rapidly losing my hair and had bumps and reactions everywhere. Two months of daily use and my hair is thicker, growing back where it had disappeared and my eczema is starting to fade. I’m never not using this!

        Was this helpful?
      • Talia
        Reviewing
        The Scalp Serum Trio | 90-Day Supply | 1% Hyaluronic Acid
        I recommend this product
        Rated 5 out of 5 stars
        6/20/26
        5 Stars

        This serum is fragrsnce free and non-irritating.

        Was this helpful?
      • Susan K.
        Verified Buyer
        Reviewing
        The Scalp Serum Trio | 90-Day Supply | 1% Hyaluronic Acid
        I recommend this product
        What are your skin concerns? Aging, Dryness
        What are your hair concerns? Dryness, Thinning
        Rated 5 out of 5 stars
        4/24/26
        Amazing!

        I have used this for about 2 years. I had very thin hair and you could see patches of my scalp in multiple places through my thinning hair. I have seen growth in several places especially my hairline. The person that cuts my hair has mentioned on several visits how much growth I have gotten over the 2 years of using this product.

        Was this helpful?
      • Natalia
        Reviewing
        The Scalp Serum Trio | 90-Day Supply | 1% Hyaluronic Acid
        I recommend this product
        Rated 5 out of 5 stars
        4/20/26
        5 Stars

        My favorite. Not greasy and actually keep my hair clean longer. Too early to say anything about the growth. But i will return with the update

        Was this helpful?