# COSRX The Vitamin C 23 Serum for acne-prone skin

**Lovi Fit: Average fit for acne-prone skin.**
Combination Skin Fit: Average · Effectiveness: High · Safety: High.

Page: https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-23-serum/for/acne-prone-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 acne-prone skin: breakouts, blackheads, and post-acne marks. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

Works for acne-prone skin; other serums fit it better.

## Why this fit

- Offers moderate brightening and evening of skin tone for your combination skin, as ascorbic acid and 3-O-ethyl ascorbic acid provide antioxidant benefits and help improve skin tone, while niacinamide offers some seboregulation.
- The formula is safe for your acne-prone skin with no risks of irritation due to the absence of harsh ingredients.
- While beneficial for antioxidant and anti-inflammatory effects, the concentrations of ascorbic acid and niacinamide provide moderate benefits for acne and blemishes, and the product lacks sufficient ingredients for optimal results across all areas of your combination skin.

## Fit by skin type

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

- Niacinamide significantly decreased hyperpigmentation and increased skin lightness compared with vehicle alone after 4 weeks of use in women by inhibiting melanosome transfer. ([The British Journal of Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12100180/))
- 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/))
- 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/))
- 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/))
- 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/))

## Why other serums fit acne-prone skin better

- A cream combining propolis, tea tree oil, and Aloe vera reduced erythema scars, acne severity index, and total lesion count better than erythromycin cream in sixty patients with mild to moderate acne vulgaris compared to placebo. ([Clinical Pharmacology, 2018](https://pubmed.ncbi.nlm.nih.gov/30588129/))
- Glycerol accelerates barrier repair and improves stratum corneum hydration compared to untreated and base-treated sites. ([Acta Dermato-venereologica, 1999](https://pubmed.ncbi.nlm.nih.gov/10598752/))
- A formulation containing glycerol (5%) and xylitol (5%) applied twice daily for 14 days increased skin hydration, filaggrin protein quantity, interdigitation index, and biomechanical properties, and decreased transepidermal water loss compared to untreated and vehicle-treated skin in twelve volunteers with dry skin. ([Acta Dermato-venereologica, 2017](https://pubmed.ncbi.nlm.nih.gov/27349297/))

## 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 as part of your PM routine and start 3x/week before working up to daily use.
- Apply this treatment after cleansing and toner, and before your moisturizer.
- Gently press 2-3 drops of the serum into your skin and let it absorb for a minute.
- Apply the product on clean, dry skin to help manage your breakouts safely.
- Avoid the eye area and do a patch test before your first use.
- Video: https://storage.pora.ai/c879dda8655a61c19d3d8c9ebad6b06d.mp4

## Questions and answers

### How well does COSRX Vitamin C 23 Serum work for acne-prone skin?

This serum works moderately well for acne-prone skin, providing basic brightening and antioxidant benefits without causing irritation. However, a product for this skin needs higher amounts of ingredients like niacinamide, propolis, and zinc PCA to deeply clear breakouts and balance oil while keeping skin calm and hydrated.
Sources: [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/), [The British Journal of Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12100180/)

### Which ingredients make this serum a good fit for acne-prone skin?

Ascorbic acid and niacinamide make this serum a fit for acne-prone skin by helping improve skin tone and offering some oil control. Because this is an average fit, products that work best for this skin need effective ingredients like niacinamide, propolis, or zinc PCA that provide excellent benefits for breakouts while keeping combination skin balanced and hydrated.
Sources: [The British Journal of Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12100180/), [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/)

### What does Vitamin C do for acne-prone skin?

Vitamin C helps brighten skin, smooth out uneven tones, and fade dark spots left behind by breakouts. It is also packed with antioxidants that may help protect acne-prone skin from everyday environmental stress.
Sources: [Journal of Cosmetic Dermatology, 2023](https://pubmed.ncbi.nlm.nih.gov/37128827/), [Journal of Drugs in Dermatology, 2024](https://pubmed.ncbi.nlm.nih.gov/39231081/)

### What does Hyaluronic Acid do for acne-prone skin?

Hyaluronic acid helps acne-prone skin by soothing irritation, calming redness, and keeping the skin balanced without clogging pores. When combined with targeted ingredients like zinc oxide, it may also help reduce breakouts.
Sources: [Biomedicines, 2025](https://pubmed.ncbi.nlm.nih.gov/41007718/), [Drug Delivery, 2017](https://pubmed.ncbi.nlm.nih.gov/28155509/)

### Where does this serum go in a skincare routine for acne-prone skin?

This serum goes in your evening routine, applied after your cleansing toner and before your moisturizer. Putting treatments in the evening keeps things simple and provides extra safety around sun exposure. To get better results for acne-prone skin, this type of product needs stronger blemish-fighting ingredients and higher amounts of active helpers.

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

You can use this serum with retinol by applying this vitamin C in the morning and your retinol at night to help avoid irritation. Using them on separate times of day is unlikely to stress your skin while still giving you brightening and smoothing benefits.
Sources: [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/)

### How often should I use this serum?

You can use this serum in the evening. This product of this type needs more targeted ingredients for blemishes and stronger oil control to work best for acne-prone skin.

### Can this serum clog pores, cause breakouts or purging for acne-prone skin?

This serum is unlikely to cause breakouts or clog pores on acne-prone skin, as the formula is safe and has no harsh ingredients that trigger irritation. However, because it provides only moderate benefits for blemishes and lacks sufficient ingredients for optimal results across all areas, acne-prone skin needs a product with stronger blemish-fighting ingredients and targeted pore-clearing support for the best results.

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

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

## Alternatives for acne-prone skin

- [Skin1004 Probio-Cica Intensive Ampoule](https://lovi.care/skincare/ca/p/skin1004/probio-cica-intensive-ampoule/for/acne-prone-skin) — High fit — CA$24.44 at Amazon
- [Dr.Althea Vitamin C Boosting Serum](https://lovi.care/skincare/ca/p/dr-althea/vitamin-c-boosting-serum/for/acne-prone-skin) — High fit — CA$27.99 at Amazon
- [ANUA PEACH 70% NIACINAMIDE SERUM](https://lovi.care/skincare/ca/p/anua/peach-70-niacinamide-serum/for/acne-prone-skin) — High fit — CA$33.50 at Amazon

## Pairs well with

- Cleanser: [B.LAB Matcha Hydrating Foam Cleanser](https://lovi.care/skincare/ca/p/b-lab/matcha-hydrating-foam-cleanser/for/acne-prone-skin) — Superior fit — CA$22.95 at Amazon
- Hydrating Toner: [Paula's Choice Resist Advanced Replenishing Toner](https://lovi.care/skincare/ca/p/paula-s-choice/advanced-replenishing-toner/for/acne-prone-skin) — Superior fit — CA$41.00 at Amazon
- Moisturizer: [CeraVe CeraVe PM Facial Moisturizing Lotion](https://lovi.care/skincare/ca/p/cerave/pm-facial-moisturizing-lotion/for/acne-prone-skin) — Superior fit — CA$20.96 at Amazon

## Where to buy

- Amazon.ca: CA$33.98 (https://www.amazon.ca/dp/B0FWQGLTQV?tag=lovi-care-web-product01-20&linkCode=osi&th=1&psc=1)
- Sephora: CA$29.00 (https://www.sephora.com/ca/en/product/advanced-vitamin-c-23-serum-reform-P521377?skuId=2959526)
Prices checked 14 Oct – 6 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/acne-prone-skin
- United Kingdom: https://lovi.care/skincare/uk/p/cosrx/the-vitamin-c-23-serum/for/acne-prone-skin
- Ireland: https://lovi.care/skincare/ie/p/cosrx/the-vitamin-c-23-serum/for/acne-prone-skin
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- Canada: https://lovi.care/skincare/ca/p/cosrx/the-vitamin-c-23-serum/for/acne-prone-skin (this page)
- Australia: https://lovi.care/skincare/au/p/cosrx/the-vitamin-c-23-serum/for/acne-prone-skin
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