# COSRX The Vitamin C 13 Serum for sensitive skin

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

Page: https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-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 Canada.

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

- Offers excellent brightening and evening of skin tone for your normal skin due to the presence of ascorbic acid and 3-0-ethyl ascorbic acid, which promote skin tone improvement.
- Panthenol and Glycyrrhiza Glabra Root Extract provide hydration and soothing benefits that support your redness and irritation.
- The formulation is safe for your sensitive skin, as it lacks prohibited or harsh ingredients that could cause irritation.

## Fit by skin type

- [Oily skin](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/oily-skin): High
- [Dry skin](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/dry-skin): High
- [Combination skin](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/combination-skin): High
- [Sensitive skin](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin): High (this page)
- [Acne-prone skin](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/acne-prone-skin): High
- [Skin with dark spots](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/dark-spots): Average
- [Mature skin](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/mature-skin): High
- [Dry sensitive skin](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/dry-sensitive-skin): High
- [Oily acne-prone skin](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/oily-acne-prone-skin): High

## Key ingredients

Ascorbic Acid, Sodium Hyaluronate, Super Vitamin E, Glutathione, 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/))
- Vitamin C mesotherapy produced a significant and earlier reduction in gingival pigmentation and higher patient satisfaction compared to topical gel in twenty healthy non-smokers with hyperpigmented gingiva, with both methods reducing the mean area fraction of melanin-forming cells at 6 months without causing pain. ([Clinical Oral Investigations, 2021](https://pubmed.ncbi.nlm.nih.gov/33966113/))
- 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](https://pubmed.ncbi.nlm.nih.gov/12113650/))
- 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](https://pubmed.ncbi.nlm.nih.gov/40613435/))
- 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](https://pubmed.ncbi.nlm.nih.gov/27425824/))
- 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/))
- Glutathione amino acid precursors effectively increase cellular glutathione levels, reducing oxidative stress, ATP depletion, and DNA damage in human keratinocytes, clinical subjects, and ex vivo skin compared to controls. ([Journal of the European Academy of Dermatology and Venereology, 2024](https://pubmed.ncbi.nlm.nih.gov/38189670/))
- Topical oxidized glutathione significantly decreases the skin melanin index and improves moisture content, smoothness, wrinkle formation, and elasticity compared to placebo in healthy women. ([Clinical, Cosmetic and Investigational Dermatology, 2014](https://pubmed.ncbi.nlm.nih.gov/25378941/))
- Topical glutathione improves hyperpigmentation, reduces ultraviolet-induced erythema and wrinkles, decreases transepidermal water loss, and enhances antioxidant capacity. ([The Journal of Clinical and Aesthetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/41416233/))
- 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

This serum is a gentle and effective option for sensitive and acne-prone skin, frequently praised for its ability to brighten the complexion and fade dark spots without causing irritation. Users often note a hydrating and plumping effect, though a significant number find the strong, fishy scent and sticky finish to be considerable drawbacks. Some also mention the need for refrigeration due to the formula's instability and occasional packaging issues.

- Liked: Gentle formula (mostly mentioned)
- Liked: Brightens skin (often mentioned)
- Disliked: Unpleasant scent (often mentioned)
- Liked: Good value (sometimes noted)
- Liked: Hydrating and plumping (sometimes noted)
- Disliked: Sticky finish (sometimes noted)
- Disliked: Storage requirements (sometimes noted)
- Disliked: Packaging issues (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 13 a great fit for sensitive skin?

This serum is a great fit for sensitive skin because it brightens and evens tone using vitamin C while avoiding harsh ingredients that typically trigger irritation. It also includes panthenol and licorice root extract, which help soothe redness and keep the skin calm and comfortable.
Sources: [American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/), [Journal of Cosmetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/40613435/)

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

This serum is a great fit for sensitive skin because it includes panthenol and licorice root extract, which help hydrate and calm redness and irritation. The formula is also safe and unlikely to cause irritation because it avoids harsh ingredients.
Sources: [American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/), [Journal of Cosmetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/40613435/)

### 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/), [Journal of Cosmetic Dermatology, 2023](https://pubmed.ncbi.nlm.nih.gov/37128827/)

### 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 the evening routine for sensitive skin, placed after cleansing and toning and before moisturizing. The formulation lacks harsh ingredients and includes soothing components that make it a great fit, helping to brighten skin tone while keeping redness and irritation calm.
Sources: [Journal of Drugs in Dermatology, 2023](https://pubmed.ncbi.nlm.nih.gov/36607762/)

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

You can use this serum with retinol, but it is best to apply them on alternate nights or use the vitamin C in the morning and retinol at night to avoid redness and irritation.

### How often should I use this serum?

This serum is used in your evening routine once a week to start, as active treatments fit best then for extra safety and simplicity around sun exposure. People who tolerate it well and see good results may carefully use it more often.

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

This serum is unlikely to clog pores or cause breakouts on sensitive skin, as its formulation lacks harsh ingredients that typically cause irritation. It also includes panthenol and licorice root extract to help keep skin calm and hydrated.
Sources: [American Journal of Clinical Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12113650/), [Journal of Cosmetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/40613435/)

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

Yes, it has no fragrance and no drying alcohol.

## Alternatives for sensitive skin

- [COSRX The Vitamin C 23 Serum](https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-23-serum/for/sensitive-skin) — High fit — CA$33.98 at Amazon
- [Skin1004 Probio-Cica Intensive Ampoule](https://lovi.care/skincare/ca/p/skin1004/probio-cica-intensive-ampoule/for/sensitive-skin) — High fit — CA$24.44 at Amazon
- [The Ordinary Matrixyl 10% + HA](https://lovi.care/skincare/ca/p/the-ordinary/matrixyl-10-ha/for/sensitive-skin) — High fit — CA$14.40 at Amazon

## Pairs well with

- Cleanser: [Fresh Soy Face Cleanser](https://lovi.care/skincare/ca/p/fresh/soy-face-cleanser/for/sensitive-skin) — Superior fit — CA$44.95 at Amazon
- Soothing Toner: [Clarins Toning Lotion with Camomile](https://lovi.care/skincare/ca/p/clarins/soothing-toning-lotion/for/sensitive-skin) — Superior fit — CA$49.00 at Amazon
- Moisturizer with Sun Protection: [Torriden DIVE-IN Mild Sunscreen](https://lovi.care/skincare/ca/p/torriden/dive-in-mild-sunscreen/for/sensitive-skin) — Superior fit — CA$27.34 at Amazon

## Where to buy

- Amazon.ca: CA$29.97 (https://www.amazon.ca/dp/B0BS8M8Q5L?tag=lovi-care-web-product01-20&linkCode=osi&th=1&psc=1)
Prices checked 3 Nov 2026.

## Ingredients

Water, Ascorbic Acid, Butylene Glycol, Dipropylene Glycol, Tromethamine, 3-0-Ethyl Ascorbic Acid, Panthenol, Acetyl Glucosamine, Caffeine, Sodium Hyaluronate, Sodium Sulfite, Disodium Edta, Glutathione, Adenosine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Squalane, Tocotrienols, Tocopherol, Palm Oil, Arginine, Niacinamide, Pentylene Glycol, Glycyrrhiza Glabra Root Extract Licorice Root Extract
## 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-13-serum/for/sensitive-skin
- United Kingdom: https://lovi.care/skincare/uk/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin
- Ireland: https://lovi.care/skincare/ie/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin
- Germany: https://lovi.care/skincare/de/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin
- France: https://lovi.care/skincare/fr/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin
- Italy: https://lovi.care/skincare/it/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin
- Netherlands: https://lovi.care/skincare/nl/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin
- Spain: https://lovi.care/skincare/es/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin
- Canada: https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin (this page)
- Australia: https://lovi.care/skincare/au/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin
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- Saudi Arabia: https://lovi.care/skincare/sa/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin
- United Arab Emirates: https://lovi.care/skincare/ae/p/cosrx/the-vitamin-c-13-serum/for/sensitive-skin