# Sunday Riley C.E.O. 15% Vitamin C Brightening Serum for skin with dark spots

**Lovi Fit: Superior fit for skin with dark spots.**
Normal Skin Fit: High · Effectiveness: High · Safety: High.

Page: https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots

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 dark spots: hyperpigmentation, sun spots, and uneven skin tone. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

One of the best serums for skin with dark spots.

## Why this fit

- Excellent brightening for your normal skin is achieved through tetrahexyldecyl ascorbate and glycolic acid, which effectively exfoliate and even skin tone while supporting overall skin health.
- Squalane and tocopherol provide antioxidant activity and hydration, further enhancing the serum's benefits for your skin.
- The formula 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
- [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 (this page)
- [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 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/))
- 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 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/))

## 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

- Apply this serum as part of your PM routine starting 3x/week and build up to daily use if your skin likes it.
- Place the serum after cleansing and toning, but before your moisturizer.
- Gently press 2-3 drops of the serum into your skin and wait a minute for it to absorb.
- Apply the serum on dry skin to help fade pigmentation effectively.
- Avoid the eye area and always use SPF 30+ during the day.
- Video: https://storage.pora.ai/c879dda8655a61c19d3d8c9ebad6b06d.mp4

## Questions and answers

### What makes Sunday Riley C.E.O. Brightening Serum one of the best fits for skin with dark spots?

This serum achieves excellent brightening for your normal skin through tetrahexyldecyl ascorbate and glycolic acid, which effectively exfoliate and even skin tone while supporting overall skin health. Squalane and tocopherol provide antioxidant activity and hydration, further enhancing the serum's benefits for your skin. The formula is safe for your skin, with no risks of irritation due to the absence of prohibited or harsh ingredients.

### Which ingredients make this serum a good fit for skin with dark spots?

Tetrahexyldecyl ascorbate and glycolic acid make this serum a great fit because they effectively even out skin tone and brighten dark spots. Squalane and tocopherol further support these benefits by adding hydration and antioxidant activity, and the formula is safe with no harsh ingredients.

### What does Tetrahexyldecyl Ascorbate do for skin with dark spots?

Tetrahexyldecyl Ascorbate helps fade dark spots and uneven pigmentation while making skin smoother and firmer. Daily use of this vitamin C form is well-suited for improving photoaging and brightening skin tone over time.
Sources: [Journal of Cosmetic Dermatology, 2024](https://pubmed.ncbi.nlm.nih.gov/38634176/)

### What does Squalane do for skin with dark spots?

Squalane helps keep skin soft and smooth, but it is unlikely to directly fade dark spots on its own. For hyperpigmentation, this type of product needs added brightening ingredients like vitamin C or antioxidants to help even out skin tone.

### Where does this serum go in a skincare routine for skin with dark spots?

This treatment goes in the evening routine after your toner and before your moisturizer. Putting it at night helps keep things simple and adds extra safety around sun exposure.

### 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 retinol at night and this serum in the morning to avoid irritation. Using them together may overwhelm your skin, so separating them helps keep your skin calm while targeting dark spots.

### How often should I use this serum?

This treatment serum works best in your evening routine once a week to start, as it gently exfoliates and brightens your skin. If your skin feels comfortable and you see good results, you may carefully use it more often.
Sources: [Journal of Cosmetic Dermatology, 2024](https://pubmed.ncbi.nlm.nih.gov/38406974/)

### Can this serum clog pores, cause breakouts or purging for skin with dark spots?

This serum is unlikely to cause breakouts or clog pores on skin with dark spots because its formula is safe with no harsh ingredients. Reviewers rarely mention breakouts, and nourishing ingredients like squalane help keep skin smooth and calm.

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

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

## Alternatives for skin with dark spots

- [Guerlain Abeille Royale Double R Renew & Repair Serum](https://lovi.care/skincare/ca/p/guerlain/abeille-royale-double-r-renew-and-repair-advanced-serum/for/dark-spots) — High fit — CA$250.04 at Amazon
- [Neutrogena Rapid Tone Repair Vitamin C Serum](https://lovi.care/skincare/ca/p/neutrogena/rapid-tone-repair-20-vitamin-c-face-serum-capsules/for/dark-spots) — High fit — CA$63.07 at Amazon
- [The Ordinary Buffet + Copper Peptides 1%](https://lovi.care/skincare/ca/p/the-ordinary/buffet-copper-peptides-1/for/dark-spots) — High fit — CA$39.50 at Amazon

## Pairs well with

- Cleanser: [CeraVe Foaming Facial Cleanser](https://lovi.care/skincare/ca/p/cerave/foaming-facial-cleanser/for/dark-spots) — Superior fit — CA$20.96 at Amazon
- Hydrating Toner: [Pyunkang Yul Calming Deep Moisture Toner](https://lovi.care/skincare/ca/p/pyunkang-yul/calming-deep-moisture-toner/for/dark-spots) — Superior fit — CA$23.99 at Amazon
- Moisturizer: [Allies of Skin Peptides & Antioxidants Firming Daily Treatment](https://lovi.care/skincare/ca/p/allies-of-skin/peptides-and-antioxidants-firming-daily-treatment/for/dark-spots) — High fit — CA$98.99 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/dark-spots
- United Kingdom: https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- Ireland: https://lovi.care/skincare/ie/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- Germany: https://lovi.care/skincare/de/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- France: https://lovi.care/skincare/fr/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- Italy: https://lovi.care/skincare/it/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- Netherlands: https://lovi.care/skincare/nl/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- Spain: https://lovi.care/skincare/es/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- Canada: https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots (this page)
- Australia: https://lovi.care/skincare/au/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- Singapore: https://lovi.care/skincare/sg/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- Saudi Arabia: https://lovi.care/skincare/sa/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots
- United Arab Emirates: https://lovi.care/skincare/ae/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots