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

**Lovi Fit: High fit for oily skin.**
Oily Skin Fit: High · Effectiveness: High · Safety: High.

Page: https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin

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

Brand: [Sunday Riley](https://lovi.care/skincare/uk/brands/sunday-riley)
Category: [Serums and treatments](https://lovi.care/skincare/uk/best/serums)

This fit is calculated for the concerns frequently associated with oily skin: shine, enlarged pores, blackheads, and blemishes. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

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

## Why this fit

- Offers excellent brightening for your oily skin due to tetrahexyldecyl ascorbate and glycolic acid, which exfoliate and even skin tone while controlling oil.
- The formula is highly suitable for oily skin, with ingredients like jojoba esters providing nourishment without clogging pores.
- The safety profile is excellent, with no risks of irritation for your oily skin due to the absence of prohibited or harsh ingredients.

## Fit by skin type

- [Oily skin](https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin): High (this page)
- [Dry skin](https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin): Low
- [Combination skin](https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/combination-skin): High
- [Sensitive skin](https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/sensitive-skin): Average
- [Acne-prone skin](https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/acne-prone-skin): High
- [Skin with dark spots](https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dark-spots): Superior
- [Mature skin](https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/mature-skin): High
- [Dry sensitive skin](https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-sensitive-skin): Average
- [Oily acne-prone skin](https://lovi.care/skincare/uk/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/))
- Topical formulations containing 3.75% glycerol and 1.25% hydrolyzed jojoba esters produced significantly lower evaporative TEWL values compared to glycerol alone at 8 and 24 hours posttreatment in human subjects. ([Journal of Cosmetic Dermatology, 2008](https://pubmed.ncbi.nlm.nih.gov/19146603/))
- 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

- Use this serum in your PM routine. Start by applying it 3 times a week and build up to daily use if your skin tolerates it well.
- Apply the serum after cleansing and toning, but right before your moisturizer for the best results.
- Gently press 2-3 drops of the serum into your skin. Let it absorb ⏱ for a minute before applying the next product.
- Apply the serum on clean and dry skin since your skin is not sensitive and you want to target oily shine. This helps control excess oil throughout the night.
- Avoid the delicate eye area and do a patch test before using the serum for the very first time.
- Video: https://storage.pora.ai/c879dda8655a61c19d3d8c9ebad6b06d.mp4

## Questions and answers

### What makes Sunday Riley Vitamin C Brightening Serum a great fit for oily skin?

This serum is a great fit for your oily skin because it brightens and evens your tone while keeping oil under control, thanks to ingredients like vitamin C and glycolic acid. It also nourishes your skin without clogging your pores and is very safe with no harsh ingredients.

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

This serum is a great fit for oily skin because ingredients like tetrahexyldecyl ascorbate and glycolic acid even your skin tone and help control oil, while jojoba esters nourish your skin without clogging pores. These ingredients work safely together to brighten your skin without causing irritation.

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

Tetrahexyldecyl Ascorbate helps protect oily skin from oxidative stress and environmental damage while supporting collagen production. When combined with stabilizers like acetyl zingerone, it is unlikely to cause irritation and may help keep skin calm and smooth.
Sources: [International Journal of Molecular Sciences, 2021](https://pubmed.ncbi.nlm.nih.gov/34445461/)

### What does Squalane do for oily skin?

Squalane helps keep oily skin soft and smooth without feeling heavy, though oxidized forms may sometimes trigger irritation. To work well for oily skin, this type of product needs lightweight, non-clogging ingredients that balance moisture without adding excess grease.
Sources: [The Journal of Investigative Dermatology, 2006](https://pubmed.ncbi.nlm.nih.gov/16778793/)

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

This serum goes in your evening routine, applied after cleansing and before your moisturizer. Treatments are placed in the evening for simplicity and extra safety around sun exposure, though some may also be used in the morning or twice a day.

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

You can use this serum with retinol by applying the serum first and following it with your retinol product, or by using them on alternate nights to keep your skin calm. Using this combination may increase dryness or sensitivity, so start slowly and watch how your skin reacts.

### How often should I use this serum?

This treatment fits into your evening routine once a week to start, since exfoliating steps begin slowly. You may carefully use it more often if your skin tolerates it well and shows good results.
Sources: [Journal of Cosmetic Dermatology, 2024](https://pubmed.ncbi.nlm.nih.gov/38406974/)

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

This serum is a great fit for your oily skin because it uses ingredients like jojoba esters that provide nourishment without clogging pores. Its safety profile is excellent, with a very low likelihood of causing breakouts and no harsh ingredients that lead to irritation.
Sources: [Journal of Cosmetic Dermatology, 2008](https://pubmed.ncbi.nlm.nih.gov/19146603/)

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

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

## Alternatives for oily skin

- [Beauty of Joseon Propolis + Niacinamide Glow Serum](https://lovi.care/skincare/uk/p/beauty-of-joseon/propolis-niacinamide-glow-serum/for/oily-skin) — Superior fit — £36.96 at Amazon
- [Neogen Dermalogy Real Niacinamide 15% Firming Serum](https://lovi.care/skincare/uk/p/neogen-dermalogy/real-niacinamide-15-firming-serum/for/oily-skin) — Superior fit — £24.20 at Amazon
- [SkinCeuticals C E Ferulic](https://lovi.care/skincare/uk/p/skinceuticals/c-e-ferulic/for/oily-skin) — High fit — £143.35 at Amazon

## Pairs well with

- Cleanser: [CeraVe Foaming Facial Cleanser](https://lovi.care/skincare/uk/p/cerave/foaming-facial-cleanser/for/oily-skin) — Superior fit — £8.29 at Amazon
- Hydrating Toner: [SOME BY MI Snail Truecica Miracle Repair Toner](https://lovi.care/skincare/uk/p/some-by-mi/snail-truecica-miracle-repair-toner/for/oily-skin) — Superior fit — £13.98 at Amazon
- Moisturizer: [COSRX Oil-Free Ultra-Moisturizing Lotion with Birch Sap](https://lovi.care/skincare/uk/p/cosrx/oil-free-ultra-moisturizing-lotion-with-birch-sap/for/oily-skin) — Superior fit — £14.80 at Amazon

## Where to buy

- Amazon.co.uk: £72.98 (https://www.amazon.co.uk/dp/B088ZWB6ZK?tag=lovi-care-web-product-21&linkCode=osi&th=1&psc=1)
Prices checked 6 Nov 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/oily-skin
- United Kingdom: https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin (this page)
- Ireland: https://lovi.care/skincare/ie/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- Germany: https://lovi.care/skincare/de/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- France: https://lovi.care/skincare/fr/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- Italy: https://lovi.care/skincare/it/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- Netherlands: https://lovi.care/skincare/nl/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- Spain: https://lovi.care/skincare/es/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- Canada: https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- Australia: https://lovi.care/skincare/au/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- Singapore: https://lovi.care/skincare/sg/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- Saudi Arabia: https://lovi.care/skincare/sa/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin
- United Arab Emirates: https://lovi.care/skincare/ae/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/oily-skin