# COSRX The Vitamin C 23 Serum for sensitive skin

**Lovi Fit: High fit for sensitive skin.**
Normal Skin Fit: High · Effectiveness: High · Safety: High.

Page: https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin

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

Brand: [COSRX](https://lovi.care/skincare/sa/brands/cosrx)
Category: [Serums and treatments](https://lovi.care/skincare/sa/best/serums)

This fit is calculated for the concerns frequently associated with sensitive skin: redness, stinging, and reactions to new products. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

A great choice for sensitive skin; a few serums fit it even better.

## Why this fit

- Excellent for your normal skin with sensitivity, as ascorbic acid and 3-o-ethyl ascorbic acid effectively brighten and even skin tone while niacinamide calms redness and irritation.
- Tocopherol and squalane further support barrier repair and provide antioxidant protection, enhancing overall skin health.
- The formula is safe for your skin due to the absence of harsh or prohibited ingredients.

## Fit by skin type

- [Oily skin](https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/oily-skin): Average
- [Dry skin](https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/dry-skin): Average
- [Combination skin](https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/combination-skin): Average
- [Sensitive skin](https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin): High (this page)
- [Acne-prone skin](https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/acne-prone-skin): Average
- [Skin with dark spots](https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/dark-spots): High
- [Mature skin](https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/mature-skin): Low
- [Dry sensitive skin](https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/dry-sensitive-skin): Average
- [Oily acne-prone skin](https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/oily-acne-prone-skin): High

## Key ingredients

Ascorbic Acid, Sodium Hyaluronate, Tocopherol Vitamin E, Squalane, Niacinamide

## What the research says

- A topical serum containing vitamin C, vitamin E, and raspberry leaf cell culture extract improved skin color, elasticity, radiance, smoothness, scaliness, and wrinkles compared to the untreated contralateral side in fifty female volunteers. ([Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/))
- 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](https://pubmed.ncbi.nlm.nih.gov/40363772/))
- Concurrent treatment with 3-O-ethyl ascorbic acid and cannabigerol in UVB-irradiated human keratinocytes prevents membrane structure alterations, promotes cell survival, enhances antioxidant enzyme activity and GSH- and Trx-dependent systems, reduces lipid and protein oxidative modifications, and exerts anti-inflammatory effects. ([Free Radical Biology & Medicine, 2025](https://pubmed.ncbi.nlm.nih.gov/39778604/))
- 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](https://pubmed.ncbi.nlm.nih.gov/12823436/))
- 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](https://pubmed.ncbi.nlm.nih.gov/19186973/))
- 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](https://pubmed.ncbi.nlm.nih.gov/34910367/))
- 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](https://pubmed.ncbi.nlm.nih.gov/22052267/))
- 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](https://pubmed.ncbi.nlm.nih.gov/34623507/))
- 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](https://pubmed.ncbi.nlm.nih.gov/31311529/))
- 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](https://pubmed.ncbi.nlm.nih.gov/40642809/))
- 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](https://pubmed.ncbi.nlm.nih.gov/34471722/))
- 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](https://pubmed.ncbi.nlm.nih.gov/38590207/))
- 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](https://pubmed.ncbi.nlm.nih.gov/40722956/))
- 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](https://pubmed.ncbi.nlm.nih.gov/33103316/))
- 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](https://pubmed.ncbi.nlm.nih.gov/17882270/))
- 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](https://pubmed.ncbi.nlm.nih.gov/16029679/))

## What reviewers say

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.

- Liked: Brightens skin (mostly mentioned)
- Liked: Fades scars (mostly mentioned)
- Disliked: Unpleasant smell (mostly mentioned)
- Liked: Affordable price (often mentioned)
- Disliked: Sticky texture (often mentioned)
- Liked: Fast absorption (sometimes noted)
- Liked: Hydrating formula (sometimes noted)
- Disliked: Oxidation issues (sometimes noted)
- Disliked: Skin irritation (sometimes noted)
- Disliked: Poor packaging (rarely noted)

## How to apply

- Use your serum in the PM routine, starting 3 times a week before building up to daily use if your skin is happy.
- Apply the serum after cleansing and toning, but before putting on your moisturizer for the best results.
- Gently press 2-3 drops of the serum into your skin and wait a minute ⏱ for it to soak in.
- Since your skin is sensitive and easily irritated, apply the serum on completely dry skin to help keep it calm.
- Always do a patch test before your first use and avoid getting the serum too close to your eyes .
- Video: https://storage.pora.ai/c879dda8655a61c19d3d8c9ebad6b06d.mp4

## Questions and answers

### What makes COSRX Vitamin C 23 a great fit for sensitive skin?

COSRX The Vitamin C 23 Serum is a great fit because ascorbic acid and 3-o-ethyl ascorbic acid brighten and even skin tone while niacinamide calms redness and irritation. Additionally, tocopherol and squalane help support barrier repair and keep skin smooth and healthy.
Sources: [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/)

### Which ingredients make this serum a good fit for sensitive skin?

Ascorbic acid and 3-o-ethyl ascorbic acid make this serum a great fit because they effectively brighten and even skin tone, while niacinamide calms redness and irritation. Additionally, tocopherol and squalane support barrier repair, and the formula is safe due to the absence of harsh or prohibited ingredients.
Sources: [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/)

### What does Vitamin C do for sensitive skin?

Vitamin C helps brighten skin, smooth out fine lines, and fade dark spots. Clinical studies show it is generally safe and well-tolerated when improving overall skin quality.
Sources: [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/)

### What does Hyaluronic Acid do for sensitive skin?

Hyaluronic acid helps calm and hydrate sensitive skin while supporting the skin barrier to keep it soft and comfortable. Clinical studies show it improves surface moisture and reduces dryness, roughness, and redness without irritation.
Sources: [Journal of Drugs in Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/41037531/), [Journal of Cosmetic Dermatology, 2018](https://pubmed.ncbi.nlm.nih.gov/29356277/)

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

This serum goes in your evening routine, applied after your soothing toner and before your moisturizer. Putting it in the evening keeps things simple and gives you extra safety around sun exposure.

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

You can use this serum with retinol by applying them on alternating nights or using retinol at night and this serum in the morning to prevent irritation on sensitive skin. Using potent vitamin C and retinol together may overwhelm sensitive skin, so separating them helps keep your skin calm and smooth.

### How often should I use this serum?

This serum is a great fit for your sensitive skin and can be used in your evening routine. Using antioxidants daily helps improve skin tone and protects your skin while keeping irritation low.
Sources: [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/)

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

This serum is a great fit for your sensitive skin because Ascorbic Acid and 3-O-Ethyl Ascorbic Acid effectively brighten and even skin tone while Niacinamide calms redness and irritation. Tocopherol and Squalane further support barrier repair and provide antioxidant protection, and the formula is safe for your skin due to the absence of harsh or prohibited ingredients.
Sources: [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/)

### Is this serum fragrance-free and alcohol-free?

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

## Alternatives for sensitive skin

- [Paula's Choice RESIST Super Antioxidant Concentrate Serum](https://lovi.care/skincare/sa/p/paula-s-choice/resist-super-antioxidant-concentrate-serum/for/sensitive-skin) — Superior fit — SAR 461.00 at Amazon
- [SkinCeuticals C E Ferulic](https://lovi.care/skincare/sa/p/skinceuticals/c-e-ferulic/for/sensitive-skin) — High fit — SAR 865.37 at Amazon
- [Neogen Dermalogy Real Vitamin C Serum](https://lovi.care/skincare/sa/p/neogen-dermalogy/real-vitamin-c-serum/for/sensitive-skin) — High fit — SAR 130.97 at Amazon

## Pairs well with

- Cleanser: [Fresh Soy Face Cleanser](https://lovi.care/skincare/sa/p/fresh/soy-face-cleanser/for/sensitive-skin) — Superior fit — SAR 191.00 at Amazon
- Soothing Toner: [Clarins Toning Lotion with Camomile](https://lovi.care/skincare/sa/p/clarins/soothing-toning-lotion/for/sensitive-skin) — Superior fit — SAR 141.00 at Amazon
- Moisturizer with Sun Protection: [Bioderma Bioderma Photoderm Mineral SPF 50+](https://lovi.care/skincare/sa/p/bioderma/photoderm-mineral-fluide-spf50/for/sensitive-skin) — Superior fit — SAR 132.22 at Amazon

## Where to buy

- Amazon.sa: SAR 108.43 (https://www.amazon.sa/dp/B0FWQGLTQV?tag=lovisa02-21&linkCode=osi&th=1&psc=1)
Prices checked 4 Nov 2026.

## 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
## About the Lovi Fit

Lovi: Unbiased, science-based skincare AI trained on real user outcomes.

Lovi calculates every fit score from the full ingredient list with brand-independent rules its 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. Levels from best to worst: Superior, High, Average, Low, Caution, Warning.

Behind this fit score: Nadia Kapleva, MS (Co-founder, Medical Director); Alexey Shagraev, PhD (Co-founder, CEO and CTO); Dr. Sofía Perea Pérez, MD, MSc (Medical Board); Aishani Shah, MD (Medical Board); Asya Zubkova, MS (Medical Board); Hanna Kurets, MD (Medical Board, Medical Advisor); Elina Nazarenko, MD (Medical Board); Victoria Derkova, MS (Medical Board).

Page built Nov 8, 2026.

More from Lovi: https://lovi.care/skincare/llms.txt

## This page in other countries

- United States: https://lovi.care/skincare/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- United Kingdom: https://lovi.care/skincare/uk/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- Ireland: https://lovi.care/skincare/ie/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- Germany: https://lovi.care/skincare/de/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- France: https://lovi.care/skincare/fr/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- Italy: https://lovi.care/skincare/it/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- Netherlands: https://lovi.care/skincare/nl/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- Spain: https://lovi.care/skincare/es/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- Canada: https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- Australia: https://lovi.care/skincare/au/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- Singapore: https://lovi.care/skincare/sg/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin
- Saudi Arabia: https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin (this page)
- United Arab Emirates: https://lovi.care/skincare/ae/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin