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Hydrating Serum 4% Multi-Molecular Hyaluronic Acid + 2% B5 — Typology
Hydrating Serum 4% Multi-Molecular Hyaluronic Acid + 2% B5 — Typology
Hydrating Serum 4% Multi-Molecular Hyaluronic Acid + 2% B5 — Typology
HYDRATING
New formula
LAB1001.3-30ml-SG1 floz

Hydrating Serum A31
4% Multi-Molecular Hyaluronic Acid + 2% B5

New, more concentrated formula: 4% hyaluronic acid in four molecular weights (from 15 to 2,000 kDa) and 2% vitamin B5 for complete hydration at every layer of the skin.

Smooths dehydration lines and visibly plumps the skin, from first application and over time.

97% naturally derived.

Free shipping
starts at $60
Complimentary gift
With every purchase over $100

This product isMade in France,Vegan,100/100 Yuka Score

A31 - Hydrating Serum

Formulated with four forms of multi-molecular hyaluronic acid, the Hydrating Serum A31 targets dehydration at every level of the epidermis and visibly smooths dehydration lines.

  • A serum suitable for all skin types

    The Hydrating Serum A31 is suitable for all skin types. It is particularly well-suited for dehydrated skin.

  • Lightweight, water-based texture that absorbs quickly

    The texture of the Hydrating Serum A31 is a water-based gel that absorbs quickly into the skin without leaving a greasy finish.

  • A formula enriched with 4 types of hyaluronic acid

    4% Hyaluronic Acid:
    This serum combines four forms of hyaluronic acid with complementary molecular weights (from 15–20 kDa to 1,500–2,000 kDa) to hydrate the skin at multiple levels.

    The smallest fractions penetrate deep into the epidermis and help strengthen the skin’s water reserves by stimulating the activity of fibroblasts involved in the synthesis of the skin’s own (endogenous) hyaluronic acid.

    The intermediate forms improve skin suppleness by increasing the water content of the stratum corneum, which causes the corneocytes to swell and reduces the spaces between cells. As a result, the skin appears smoother and fine lines are diminished.

    The high molecular weight forms remain on the surface and create a protective film that helps limit transepidermal water loss. This combination of different forms of hyaluronic acid provides the skin with comprehensive hydration that is both immediate and long-lasting.

    2% Pro-Vitamin B5:
    Pro-vitamin B5, or panthenol, complements the action of hyaluronic acid by strengthening the hydrolipidic film on the skin’s surface. It is also absorbed by the epidermis and then converted into pantothenic acid, that is, vitamin B5, a molecule involved in the synthesis of fatty acids and lipids that make up the skin’s lipid barrier. As a result, this barrier is better protected against dehydration.

  • Recyclable glass bottle

    Product composed of a glass bottle, a glass dropper, and a recyclable Polypropylene (PP) ring.

    The nitrile dropper should be disposed of in the household waste bin.

  • Ingredients

    7 ingredients.
    97% naturally derived.

    Aqua (Water), Sodium Hyaluronate, Panthenol, 1,2-Hexanediol, Sodium Acetylated Hyaluronate, Hydroxyacetophenone, Citric Acid.

    The lists of ingredients used in the composition of our brand's products are regularly updated. Before using a product from our brand, you are encouraged to read the list of ingredients on its packaging to ensure that the ingredients are suitable for your personal use.

How to apply the Hydrating Serum A31?

Apply three to four drops of the Hydrating Serum A31 to a cleansed, dry face, morning and evening. Gently massage into the face and neck using circular motions. Follow with a moisturizer suited to your skin type.

You can also mix a few drops of serum into a pea-sized amount of moisturizer just before applying.

We recommend using the Hydrating Serum A31 for at least four weeks to see results.

Who is the Hydrating Serum A31 for?

The Hydrating Serum A31 is suitable for all skin types. It is particularly well-suited for dehydrated skin.

Can the serum be used in combination with other skincare products (e.g. serums, moisturizers, etc.)?

There are no contraindications to pairing the product with other ranges. The serum can be used with all other face products.

What is the molecular weight of hyaluronic acid in serum?

The serum contains both high molecular weight and low molecular weight hyaluronic acid.

Is it possible to use the serum during a microneedling session?

The products have not been designed for microneedling, so it is not recommended to use them in this way.

Is the serum effective in combating wrinkles and signs of ageing?

For wrinkles, products with firming or plumping active ingredients are recommended.

Which serum is recommended for combination skin that tends to be oily and shiny, especially on the T-zone?

The moisturizing serum is recommended for its light, non-greasy texture, suitable for all skin types.

Is the serum suitable for pregnant or breast-feeding women?

The serum is not contraindicated for pregnant and breastfeeding women. If there are any restrictions, they will be mentioned in the precautions for use section on the page. A full list of products not recommended can be found on the provided page.
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4.3/5 

This product is rated 4.3/5, based on over 2675 reviews from verified purchases.
  • Jaclyn L. Verified buyer

    Fantastic hydration

    3/5/26

    I was suffering from deep dehydration from the product I was using to combat hormonal acne. I layered this on top of spot treatments and my skin loved it. I lost that tight feeling and it was great around my very sensitive eye area. No trouble with acne as a result. Will be purchasing again!
  • Ornella M. Verified buyer

    Hydrating serum

    25-34 years old 1/26/26

    I have been using the Typology range for dry skin for a month now, and I am really very happy. These products are moisturizing without being sticky or greasy. I recommend them for anyone with dry and sensitive skin. This hydrating serum is excellent. Their entire range for dry skin is great, and their prices are reasonable.

    Translated from French.

  • Anonymous Verified buyer

    I always love it all

    35-44 years old 1/23/26

    I could not be happier that I have found typology. My skin has improved so much and I very rarely even use makeup anymore. As a 40-year-old female with the normal aging of skin, this has been a real game-changer for me.
  • Anonymous Verified buyer

    It seems you've only provided the word "Serum." If you have specific product reviews or text that you'd like translated from French to English, please share them, and I'll be happy to help!

    45-54 years old 1/13/26

    It's a quality product that's easy to apply and pairs well with the cream. It gives a feeling of hydrated skin.

    Translated from French.

  • Manuela S. Verified buyer

    Magic product. I have a...

    25-34 years old 9/4/25

    Magical product. I have very dry skin that reacts strongly to products. This serum plumps my skin, deeply hydrates it, and leaves it smooth. I love it!!! I recommend it 100%!

    Translated from French.

  • Lyrlia d. Verified buyer

    My favorite product from Typology

    35-44 years old 6/27/25

    The application, the effect on the skin, the medium and long-term results – I love everything about this product. Super effective even on sensitive skin like mine.

    Translated from French.

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