Rosemary Serum | 30-Day Supply

30 ml / 1 fl oz
4.3
Rated 4.3 out of 5 stars
11 Reviews

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

The Rosemary Serum (30-Day Supply) is an advanced leave-in serum for daily use. A combination of 70% Rosemary Water, Oil, Extract and 5% Capixyl™ helps support denser, fuller, healthier looking hair. The Rosemary Serum also includes a micro-dose of plant proteins and essential ceramides. The Rosemary Serum is a clear, quick-dry, and no-residue serum. The Rosemary Serum smells like pure Rosemary. No fine fragrance has been added. The Rosemary Serum does not smell like the Rosemary Shampoo or the Rosemary Conditioner. Dermatologist-Tested. Hypoallergenic. Non-Comedogenic. Vegan. Color-Safe.

$48

30 ml / 1 fl oz

Free US Shipping $75+ | Free Returns

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

The Rosemary Serum (30-Day Supply) is an advanced leave-in serum for daily use. A combination of 70% Rosemary Water, Oil, Extract and 5% Capixyl™ helps support denser, fuller, healthier looking hair. The Rosemary Serum also includes a micro-dose of plant proteins and essential ceramides. The Rosemary Serum is a clear, quick-dry, and no-residue serum. The Rosemary Serum smells like pure Rosemary. No fine fragrance has been added. The Rosemary Serum does not smell like the Rosemary Shampoo or the Rosemary Conditioner. Dermatologist-Tested. Hypoallergenic. Non-Comedogenic. Vegan. Color-Safe.

Free US Shipping $75+ | Free Returns

BUY IT WITH

TARGETS

Hair Health

TREATMENT

Formula Contains:

Rosemary Water
Rosemary Oil
Rosemary Extract
5% Capixyl™
Proteins
Ceramides

See Ingredients

TESTED

Product Is:

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

TEXTURE

Liquid

SCENT

Rosemary

Note: The Rosemary Serum smells like pure Rosemary. No fine fragrance has been added to this formula. The Rosemary Serum does not smell like the Rosemary Shampoo or the Rosemary Conditioner.

pH

4.7 - 5.7

USAGE

See Usage

FOOTPRINT

Brand Is:

  • 1% For The Planet
  • Certified B Corp
  • Certified Climate Neutral
  • Certified Plastic Neutral
  • Certified FCS
  • How2Recycle

What Is Capixyl™?

Capixyl™ is an anti-thinning agent for hair. It is a synergistic combination of a biomimetic peptide and red clover flower extract rich in Biochanin A. Capixyl™ helps support denser, fuller, healthier-looking hair. Daily used is required for results.

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 pH range is indicated is that pH may vary during the manufacturing process and/or slightly change over time. Formula that do not contain enough water, will not have a pH.

Answer


Is This Product Certified Eczema-Safe?

No. This product does not hold 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



4.3
Rated 4.3 out of 5 stars
Based on 11 reviews
Total 5 star reviews: 9 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 2
11 reviews
  • Ryane B.
    Verified Buyer
    Reviewing
    Rosemary Serum | 30-Day Supply
    I recommend this product
    Rated 5 out of 5 stars
    10/20/25
    Love!

    Makes my scalp happy and I can already tell I have more growth up front where I have been thinning.

  • Amy
    Verified Buyer
    Reviewing
    Rosemary Serum | 90-Day Supply
    I recommend this product
    What are your hair concerns? Thinning
    Rated 5 out of 5 stars
    10/12/25
    Works great!

    I was worried about using this at first because I have baby fine hair and most things will weigh it down and leave it feeling super greasy. This serum absorbs in nicely and doesn't leave my hair oily. I have been using it every night for a little over two months now and I have a ton a little baby hair sprouting up all over the top of my head. I am super excited with the results and will continue to use this serum!

  • Marissa
    Verified Buyer
    Reviewing
    Rosemary Serum | 30-Day Supply
    I recommend this product
    What are your skin concerns? Eczema/Psoriasis, Aging, Dryness, Uneven Skin/Spots
    What are your hair concerns? Dryness, Thinning, Damage
    Rated 5 out of 5 stars
    9/29/25
    Noticeable Difference!

    I’ve been using the Nécessaire Rosemary Serum for 8 weeks and wow — total game changer. 🌿 My scalp feels so much healthier, less itchy, and way less flaky by week 2. By week 4, I noticed less shedding and stronger hair overall. Now at week 8, my hairline looks fuller and my strands feel thicker — even my stylist commented on it! 🙌

    The serum is lightweight, non-greasy, and super easy to apply (no mess, no weird residue). Plus, the scent is so fresh and spa-like — I actually look forward to using it. It’s like skincare, but for your scalp. If you’ve been ignoring your roots, this is your sign. ✨

  • Elen P. B.
    Verified Buyer
    Reviewing
    Rosemary Serum | 30-Day Supply
    I recommend this product
    What are your skin concerns? Aging, Dryness, Discoloration, Uneven Skin/Spots
    What are your hair concerns? Dryness, Thinning, Damage, Frizz
    Rated 5 out of 5 stars
    9/22/25
    Real Results

    I am seeing real results with consistent use of the serum(s) - this one has a mild, pleasant rosemary scent which disappears quickly. Clear, light and unobtrusive - easy to use. No more sensitive, irritated scalp - baby hairs jumping up in formerly sparse areas. The serums play very well with other products. No, they are not inexpensive, but I have found it worth what you pay for it. I rotate between the clear, Unscented, serum and this new Rosemary one - they have made all the difference in my hair. The serums are the perfect addition to the Shampoos and Conditioners (both types excellent)

  • Tonia
    Reviewing
    Rosemary Serum | 30-Day Supply
    I recommend this product
    Rated 5 out of 5 stars
    8/31/25
    5 Stars

    Too soon to see growth, but i like the drops.