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COSRX The Vitamin C 23 Serum for dry skin

Rated by Lovi · Unbiased, science-based skincare AI trained on real user outcomes

COSRX The Vitamin C 23 Serum

Average

  • HighDry Skin Fit
  • AverageEffectiveness
  • HighSafety

Works for dry skin; other serums fit it better.

This fit is calculated for the concerns frequently associated with dry skin: flakiness, tightness, dehydration, fine lines, and wrinkles. For scores and recommendations based on your full skin profile, including your 12D face scan results and any goals or preferences you have, please use the Lovi app.

Page built Nov 8, 2026How the Fit score works

Lovi Assistant explains

  • Offers moderate suitability for your dry skin as humectants like sodium hyaluronate and emollients such as squalane provide some hydration, but it lacks sufficient occlusive components for optimal moisture retention.
  • The presence of ascorbic acid and 3-o-ethyl ascorbic acid effectively brightens and evens your skin tone, while panthenol and sodium hyaluronate offer general hydration and soothing benefits.
  • The formula is safe for your dry skin, with no risks of irritation due to the absence of prohibited or harsh ingredients.

How to apply

  • Apply this serum PM, starting 3×/week and working up to daily use as your skin adjusts.
  • Place the serum after cleansing and toner, but right before your moisturizer.
  • Gently press 2-3 drops of the serum into your skin and let it absorb for a minute.
  • Apply the serum on slightly damp skin to help lock in extra moisture.
  • Avoid the eye area and do a patch test before your first use.

People Say

★4.1Overall rating based on 6.0k+ reviews

Based on a very large amount of data, users frequently praise this serum for its potent ability to brighten dull complexions and fade stubborn acne scars, often noting visible results within a few weeks. The high 23% concentration can be irritating for sensitive skin, and many users dislike the sticky texture and strong scent.

Highlights

  • Brightens skin Mostly Mentioned
    • “noticeable glow”
    • “brightens complexion”
    • “radiant skin”
  • Fades scars Mostly Mentioned
    • “lightened dark spots”
    • “faded acne scars”
    • “cleared hyperpigmentation”
  • Unpleasant smell Mostly Mentioned
    • “smells like hot dogs”
    • “meaty scent”
    • “bad smell”
  • Affordable price Often Mentioned
    • “great price point”
    • “good value”
    • “affordable vitamin C”
  • Sticky texture Often Mentioned
    • “tacky finish”
    • “feels sticky”
    • “like glue”
  • Fast absorption Sometimes Noted
    • “absorbs quickly”
    • “sinks in fast”
    • “doesn't feel greasy”
  • Hydrating formula Sometimes Noted
    • “feels moisturizing”
    • “hydrating finish”
    • “leaves skin supple”
  • Oxidation issues Sometimes Noted
    • “oxidized quickly”
    • “turned orange fast”
    • “needs fridge storage”
  • Skin irritation Sometimes Noted
    • “caused breakouts”
    • “stung my face”
    • “burning sensation”
  • Poor packaging Rarely Noted
    • “leaky bottle”
    • “messy dropper”
    • “crusty rim”

Sources: lovi.care, amazon.com, ulta.com, dermstore.com, yesstyle.com, reddit.com, and more

Questions and answers

How well does COSRX Vitamin C 23 work for dry skin?

COSRX The Vitamin C 23 Serum works moderately well for dry skin because ingredients like sodium hyaluronate and squalane provide hydration, though it lacks enough sealing components to lock in moisture. To truly thrive, dry skin needs products rich in barrier-supporting ingredients like ceramides, soothing plant extracts, and heavier moisture-locking agents.

Dermatologic Therapy, 2022American Journal of Clinical Dermatology, 2002

Which ingredients make this serum a good fit for dry skin?

Sodium hyaluronate and squalane help provide some hydration, while panthenol offers soothing benefits for dry skin. However, dry skin needs products with rich occlusive ingredients and barrier-supporting components like ceramides, propolis, or peptides to lock in moisture and nourish effectively.

American Journal of Clinical Dermatology, 2002The Journal of Dermatological Treatment, 2017

What does Vitamin C do for dry skin?

Vitamin C helps dry skin by boosting moisture and keeping the surface smooth and soft. It may also improve skin hydration and support the outer protective barrier over time.

Skin Research and Technology, 2008Experimental Dermatology, 2008

What does Hyaluronic Acid do for dry skin?

Hyaluronic acid draws moisture into dry skin, giving an immediate and lasting boost in hydration that helps smooth out fine lines and soften rough patches. It is very gentle and unlikely to cause irritation while improving overall skin smoothness and plumpness.

Dermatology and Therapy, 2021Journal of Drugs in Dermatology, 2011

Where does this serum go in a skincare routine for dry skin?

This treatment goes in your evening routine after cleansing and before your moisturizer. Dry skin also needs rich heavy creams with sealing ingredients like ceramides or plant butters to lock in long-lasting moisture.

Can I use this serum with retinol, and in what order?

You can use this serum with retinol by applying this treatment first and following with your retinol on alternate nights or in separate routines to avoid irritation. Dry skin needs a product of this type to include rich heavy sealants that lock in moisture alongside soothing hydrators.

How often should I use this serum?

You can use this treatment in your evening routine for simplicity and extra safety around sun exposure. Dry skin needs rich moisturizing ingredients and heavy sealants to lock in moisture and prevent dryness when using this type of product.

Can this serum clog pores, cause breakouts or purging for dry skin?

This serum is unlikely to cause breakouts or clog pores on dry skin, and it does not cause skin purging since it lacks exfoliating acids. While it is safe for your skin, dry skin often needs richer, sealing ingredients to lock in moisture effectively.

Is this serum fragrance-free and alcohol-free?

It has no fragrance and contains drying alcohol (alcohol denat).

What the research says

  • Topical hyaluronic acid filler serum combined with Botulinum toxin type A lengthened the duration of the toxin's effect in reducing wrinkles compared to Botulinum toxin type A alone.

    Dermatologic Therapy, 2022

  • Hyaluronic acid extracts are safe and efficacious products for skin repair when used in tissue regeneration alone or in combination with herbal or Western medicine.

    Journal of Pharmacy & Pharmaceutical Sciences, 2015

  • Topical dexpanthenol acts as a moisturizer, improves stratum corneum hydration, accelerates wound healing and epidermal regeneration, reduces erythema, and improves symptoms of skin irritation compared to vehicle or no pretreatment.

    American Journal of Clinical Dermatology, 2002

  • A new topical panthenol-containing emollient significantly improved transepidermal water loss reduction, stratum corneum hydration, and intercellular lipid lamellae length compared with control in healthy subjects without negatively impacting bacterial viability.

    The Journal of Dermatological Treatment, 2017

  • A panthenol-enriched mask significantly decreased erythema and hyperpigmentation, increased sebum and stratum corneum moisture, and reduced transepidermal water loss compared to a saline dressing in 60 subjects undergoing facial laser treatment.

    Journal of Cosmetic Dermatology, 2025

  • Topical application of 5% vitamin C cream significantly improved global clinical scores, increased skin microrelief density, and induced elastic tissue repair in photoaged skin compared to excipient control in healthy female volunteers.

    Experimental Dermatology, 2003

  • Ascorbic acid 2-glucoside gel significantly reduced gingival melanin pigmentation after 4 weeks compared to placebo in 73 subjects with symmetric pigmentation.

    Journal of Periodontology, 2009

  • Topical application of VC-IP cream twice daily for 8 weeks reduces periorbital wrinkles in female subjects compared to a placebo cream.

    Journal of Cosmetic Dermatology, 2022

  • Topical application of 0.1% hyaluronic acid formulations of different molecular weights led to significant improvements in skin hydration and elasticity, with low-molecular-weight formulations also significantly reducing wrinkle depth in seventy-six female subjects compared to a vehicle control.

    Journal of Drugs in Dermatology, 2011

  • Topical application of hyaluronic acid in conjunction with free gingival graft significantly reduced donor site postoperative pain until day 7 compared to normal saline, with no significant differences in graft dimensions or patient satisfaction.

    Clinical Oral Investigations, 2022

  • Treatment with a hyaluronic acid-containing mouth rinse or topical gel led to significant lesion reduction, pain relief, and normalization of lesion color in adult patients with minor recurrent aphthous stomatitis, with the gel formulation showing an earlier healing onset at 3 days.

    BMC Oral Health, 2019

  • Topical application of an antioxidant serum containing 15% ascorbic acid, 0.5% ferulic acid, and 1% tocopherol prevented particulate matter-induced degradation of extracellular matrix components, inflammation, and oxidative stress in the skin of 15 female volunteers compared to untreated controls.

    Journal of Cosmetic Dermatology, 2025

  • Dermatological products containing d-alpha tocopheryl acetate showed non-comedogenic potential with less than a 50% increase in microcomedones in 12 healthy male subjects compared to octyl palmitate.

    Contemporary Clinical Trials Communications, 2021

  • Topical application of an antioxidant mix containing 15% ascorbic acid, 0.5% ferulic acid, and 1% tocopherol prevented PM and UV-induced skin barrier perturbation, lipid peroxidation, inflammatory markers, MMP9 activation, and Type I collagen loss in 15 healthy females compared to untreated exposed skin.

    Journal of Cosmetic Dermatology, 2024

  • Squalane at 0.005-0.015% counteracts UVA-induced oxidative stress, inflammation, and collagen metabolism inhibition while stimulating fibroblast migration in human dermal fibroblasts.

    Molecules, 2025

  • Plant-derived squalane protected human dermal fibroblasts against UVA-induced damage by counteracting ROS formation, suppressing apoptosis-related proteins p53, caspase-3, caspase-9, and PARP, and restoring the pro-survival p-Akt/mTOR pathway.

    Antioxidants, 2025

  • Topical post-laser application of human adipocyte-derived mesenchymal stem cell media combined with niacinamide significantly improved wrinkle index, melanin index, patient satisfaction, and investigator esthetic improvement scores compared to vehicle cream in patients with aging skin.

    Journal of Cosmetic Dermatology, 2021

  • Topical nicotinamide prevented solar-simulated UV-induced immunosuppression in healthy volunteers, and men experienced immunosuppression at solar-simulated UV doses three times lower than those required for women.

    The Journal of Investigative Dermatology, 2008

  • Topical 5% niacinamide applied twice daily for 12 weeks reduced fine lines and wrinkles, hyperpigmented spots, red blotchiness, and skin sallowness, and improved skin elasticity compared to vehicle control in 50 female white subjects with facial photoaging.

    Dermatologic Surgery, 2005

Why other serums fit dry skin better

Ingredients

Water, Ascorbic Acid, Propanediol, Dimethicone, Tromethamine, Panthenol, 3-O-Ethyl Ascorbic Acid, Squalane, Caffeine, Sodium Chloride, Sodium Hyaluronate, Sodium Sulfite, Disodium Edta, Glutathione, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Palm Oil, Butylene Glycol, Arginine, Niacinamide, Pentylene Glycol, Alcohol Denat, Helianthus Annuus Seed Oil Sunflower Seed Oil, Glycyrrhiza Glabra Root Extract Licorice Root Extract, Methyl Trimethicone, Carthamus Tinctorius Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa Root Extract Carrot Root Extract, Beta-Carotene

Behind this fit score

Lovi calculates every fit score from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.

  • Nadia Kapleva, MS

    Nadia Kapleva, MS

    Co-founder, Medical Director

    Cosmetic chemist, cosmetologist, aesthetic products developer

  • Alexey Shagraev, PhD

    Alexey Shagraev, PhD

    Co-founder, CEO and CTO

    PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex

  • Dr. Sofía Perea Pérez, MD, MSc

    Dr. Sofía Perea Pérez, MD, MSc

    Medical Board

    Aesthetic medicine practitioner, MSc in Longevity and Anti-Aging Medicine

  • Aishani Shah, MD

    Aishani Shah, MD

    Medical Board

    Specialist dermatologist, MBBS, MD, IFAAD

  • Asya Zubkova, MS

    Asya Zubkova, MS

    Medical Board

    Cosmetic chemist, SCS, IFSCC member

  • Hanna Kurets, MD

    Hanna Kurets, MD

    Medical Board, Medical Advisor

    Dermatology MD

  • Elina Nazarenko, MD

    Elina Nazarenko, MD

    Medical Board

    Dermatology and diagnostic consultant

  • Victoria Derkova, MS

    Victoria Derkova, MS

    Medical Board

    Cosmetic chemist, cosmetic development technologist

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Prices checked 14 Oct – 6 Nov 2026

The Lovi Fit is the same in every country; only the stores and prices differ, and the ones here are for Canada.

How does it fit your skin?

Scan your face, then any product: Lovi shows how well it fits you and what fits even better.

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