# Sunday Riley C.E.O. 15% Vitamin C Brightening Serum for sensitive skin

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

Page: https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-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: [Sunday Riley](https://lovi.care/skincare/ca/brands/sunday-riley)
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.

Works for sensitive skin; other serums fit it better.

## Why this fit

- Suitable for normal skin with sensitivity, this serum offers moderate brightening due to tetrahexyldecyl ascorbate and glycolic acid, which help even skin tone while supporting overall skin health.
- Squalane provides hydration that can be beneficial for redness and irritation, though specialized ingredients to directly target these concerns are absent.
- The formulation is safe for your skin, with no risks of irritation due to the absence of prohibited or harsh ingredients.

## Fit by skin type

- [Oily skin](https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin): High
- [Dry skin](https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin): Low
- [Combination skin](https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/combination-skin): High
- [Sensitive skin](https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin): Average (this page)
- [Acne-prone skin](https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/acne-prone-skin): High
- [Skin with dark spots](https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots): Superior
- [Mature skin](https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/mature-skin): High
- [Dry sensitive skin](https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-sensitive-skin): Average
- [Oily acne-prone skin](https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-acne-prone-skin): High

## Key ingredients

Tetrahexyldecyl Ascorbate Ascorbic Acid, Squalane, Phytosterols, Glycolic Acid, Saccharide Isomerate

## What the research says

- A 3-in-1 anti-aging topical night serum-in-oil applied once daily decreased wrinkles by 11%, increased skin firmness by 8%, reduced redness by 70%, and improved overall skin quality and complexion in 103 female subjects over 28 to 84 days compared to baseline. ([Journal of Cosmetic Dermatology, 2019](https://pubmed.ncbi.nlm.nih.gov/30924254/))
- 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/))
- Application of squalene/phosphotungstate calcium nanowires (Sql/PWC) oleogel on UVB-irradiated skin decreased epidermal thickness, increased dermal thickness, and promoted the expression of elastin, collagen, and skin barrier markers through antioxidant and anti-inflammatory activities. ([Journal of Nanobiotechnology, 2025](https://pubmed.ncbi.nlm.nih.gov/40001122/))
- 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/))
- 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 application of soybean phytosterols improves skin barrier recovery compared to a vehicle control in human volunteers with tape-stripped skin. ([Journal of Cosmetic Science, 2008](https://pubmed.ncbi.nlm.nih.gov/18528589/))
- Topical application of a formulation containing niacinamide and soy phytosterols recovered about 95% of skin barrier integrity eight days after tape stripping in vivo. ([Current Drug Delivery, 2016](https://pubmed.ncbi.nlm.nih.gov/26201345/))
- Topical application of phytosterols and ceramides on healthy skin blocked the UV-induced down-regulation of COL1A1 and COL1A2 expression, while all four tested preparations inhibited the UV-induced up-regulation of MMP-1. ([Der Hautarzt; Zeitschrift Fur Dermatologie, Venerologie, und Verwandte Gebiete, 2008](https://pubmed.ncbi.nlm.nih.gov/18528670/))
- Repeated short-contact 70% glycolic acid peels provided superior results in atrophic acne scars compared to daily low-strength glycolic acid cream or placebo in 58 women over 24 weeks. ([International Journal of Dermatology, 2000](https://pubmed.ncbi.nlm.nih.gov/11095203/))
- Serial glycolic acid peels combined with a modified Kligman formula significantly reduced facial PIH severity in Indian patients compared to the modified Kligman formula alone. ([Dermatologic Surgery, 2017](https://pubmed.ncbi.nlm.nih.gov/28114204/))
- A combination cream of stimu-tex AS and saccharide isomerate reduced erythema, increased skin capacitance, and reduced transepidermal water loss compared to placebo in 20 subjects after fractional CO2 laser procedure without causing serious adverse events. ([Lasers in Medical Science, 2025](https://pubmed.ncbi.nlm.nih.gov/41134387/))
- A novel moisturizer containing saccharide isomerate accelerates skin barrier recovery, improves hydration, reduces erythema, and alleviates discomfort compared to a control moisturizer following intense pulsed light treatment in subjects with skin aging. ([The Journal of Dermatological Treatment, 2025](https://pubmed.ncbi.nlm.nih.gov/41211697/))
- Formulations containing saccharide isomerate significantly improved transepidermal water loss, sebum secretion, and scalp flaking compared to a placebo formulation in an adult Chinese population affected by dandruff scalp. ([Journal of Cosmetic Dermatology, 2023](https://pubmed.ncbi.nlm.nih.gov/35279940/))

## Why other serums fit sensitive skin better

- Topical application of TAT-SOD significantly suppresses UVB-induced erythema formation, blood flow rise, and apoptotic sunburn cell formation in human volunteers compared to a vehicle control. ([European Journal of Pharmaceutics and Biopharmaceutics, 2016](https://pubmed.ncbi.nlm.nih.gov/27460952/))

## What reviewers say

Based on a very large amount of data, users with dull, dry, and sensitive skin frequently praise this serum for its rich, creamy texture that hydrates while delivering a visible "lit-from-within" glow. Many report significant fading of acne scars and hyperpigmentation without the irritation common to other Vitamin C products, though a minority of users found the high price point unjustifiable for the results achieved.

- Liked: Brightens and evens tone (mostly mentioned)
- Liked: Hydrating creamy texture (mostly mentioned)
- Disliked: High price point (mostly mentioned)
- Liked: Gentle on sensitive skin (often mentioned)
- Liked: Pleasant citrus scent (often mentioned)
- Disliked: Packaging issues (sometimes noted)
- Disliked: Caused breakouts (rarely noted)
- Disliked: Lack of results (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

### How well does Sunday Riley C.E.O. Vitamin C Serum work for sensitive skin?

This serum works for sensitive skin, though other products fit it better because it lacks specialized ingredients to directly target redness and irritation. A product of this type needs soothing ingredients like niacinamide or snail secretion filtrate to properly calm this skin.
Sources: [Journal of Cosmetic Dermatology, 2019](https://pubmed.ncbi.nlm.nih.gov/30924254/), [Molecules, 2025](https://pubmed.ncbi.nlm.nih.gov/40363772/)

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

This serum works well for sensitive skin because it includes squalane for hydration and soothing support against redness, alongside vitamin C to help even skin tone. To be an even better fit for sensitive skin, a product of this type needs specialized ingredients to directly target redness and irritation.
Sources: [Molecules, 2025](https://pubmed.ncbi.nlm.nih.gov/40363772/)

### What does Tetrahexyldecyl Ascorbate do for sensitive skin?

Tetrahexyldecyl Ascorbate may help protect sensitive skin against everyday oxidative stress and support a bright, smooth look when properly stabilized. Because pure forms can sometimes irritate dry or reactive skin, this vitamin C derivative needs calming and stabilizing ingredients to deliver antioxidant benefits safely.
Sources: [Journal of Cosmetic Dermatology, 2012](https://pubmed.ncbi.nlm.nih.gov/23174055/), [International Journal of Molecular Sciences, 2021](https://pubmed.ncbi.nlm.nih.gov/34445461/)

### What does Squalane do for sensitive skin?

Squalane helps calm sensitive skin by defending against everyday irritation and keeping it smooth and soft. It is unlikely to cause irritation and supports your skin barrier so it stays comfortable and hydrated.
Sources: [International Journal of Molecular Sciences, 2017](https://pubmed.ncbi.nlm.nih.gov/29280987/)

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

This treatment serum goes in the evening routine for sensitive skin, starting at once a week to see how your skin reacts. A product of this type needs soothing and calming ingredients along with gentle hydration to keep sensitive skin comfortable and smooth.

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

You can use this serum with retinol, but it is best to apply retinol at night and this serum in the morning to prevent overloading sensitive skin. A product of this type for sensitive skin needs extra soothing ingredients to help calm redness and irritation.

### How often should I use this serum?

This serum can be used once a week as part of an evening routine to help brighten skin tone safely. Sensitive skin needs products with calming agents and extra hydration to actively reduce redness and soothe irritation.

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

This serum is unlikely to cause breakouts for sensitive skin, as it has a safe formulation with a low complaint rate for clogged pores. To work better for this skin type, a product like this needs specialized soothing ingredients to directly target redness and irritation.

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

It has no drying alcohol and contains fragrance (limonene and linalool).

## 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

- Sephora: CA$115.00 (https://www.sephora.com/ca/en/product/c-e-o-rapid-flash-brightening-serum-P418346?skuId=1929306)
Prices checked 10 Oct 2026.

## Ingredients

Water, Tetrahexyldecyl Ascorbate, Squalane, Peg-8 Beeswax, Hydrogenated Polydecene, Polyglyceryl-6 Distearate, Ppg-12 Smdi Copolymer, Phenoxyethanol, Acetamidoethoxyethanol, Jojoba Esters, Sodium Acrylate Sodium Acryloyldimethyl Taurate Copolymer, Glycine Soja Sterols, Tocopherol, Glycolic Acid, Caprylyl Glycol, Sodium Phytate, Citrus Aurantium Dulcis Oil, Chlorphenesin, Alba Cera, Glycerin, Isosqualane, C30 Hydrocarbons, Saccharide Isomerate, Limonene, Linalool
## 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/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- United Kingdom: https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- Ireland: https://lovi.care/skincare/ie/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- Germany: https://lovi.care/skincare/de/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- France: https://lovi.care/skincare/fr/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- Italy: https://lovi.care/skincare/it/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- Netherlands: https://lovi.care/skincare/nl/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- Spain: https://lovi.care/skincare/es/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- Canada: https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin (this page)
- Australia: https://lovi.care/skincare/au/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- Singapore: https://lovi.care/skincare/sg/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- Saudi Arabia: https://lovi.care/skincare/sa/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin
- United Arab Emirates: https://lovi.care/skincare/ae/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin