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

**Lovi Fit: Low fit for dry skin.**
Dry Skin Fit: Average · Effectiveness: Average · Safety: Concerning.

Page: https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-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 dry skin: flakiness, tightness, dehydration, fine lines, and wrinkles. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

A weak match for dry skin; the serums alongside fit it better.

## Why this fit

- Offers moderate brightening for your dry skin due to tetrahexyldecyl ascorbate and glycolic acid, which help even skin tone but may exacerbate dryness.
- The formula provides some exfoliation benefits for dry or flaky skin with glycolic acid, though it lacks sufficient emollient ingredients like squalane to fully address dryness.

## 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
- [Dry skin](https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin): Low (this page)
- [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 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/))

## Why other serums fit dry skin better

- Treatment with cross-linked hyaluronic acid-based microneedle patches combined with acetyl hexapeptide-8 or epidermal growth factor significantly improved wrinkles and skin hydration compared to the patch alone in Korean females over 29 days. ([Annals of Dermatology, 2019](https://pubmed.ncbi.nlm.nih.gov/33911590/))
- Acetyl hexapeptide-3 and tripeptide-10 citrulline demonstrated antiwrinkle efficacy and decreased transepidermal water loss in twenty-four healthy volunteers compared to control groups, though synergistic effects between the two peptides remained unclear. ([Journal of Cosmetic Dermatology, 2017](https://pubmed.ncbi.nlm.nih.gov/28150423/))

## 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 PM, starting 3×/week and working up to daily use as your skin adjusts.
- Place the serum after cleansing and toner, but right before your moisturizer.
- Gently press 2-3 drops of the serum into your skin and let it absorb for a minute.
- Apply the serum on slightly damp skin to help lock in extra moisture.
- Avoid the eye area and do a patch test before your first use.
- Video: https://storage.pora.ai/c879dda8655a61c19d3d8c9ebad6b06d.mp4

## Questions and answers

### Why is Sunday Riley C.E.O. Vitamin C Brightening Serum a weak match for dry skin?

This serum is a weak match because it may dry out your skin further while offering only moderate brightening and exfoliation benefits. A product of this type needs rich hydrating and soothing ingredients like ceramides, niacinamide, or peptides to nourish dry skin and support its barrier without irritation.
Sources: [Journal of Cosmetic Dermatology, 2019](https://pubmed.ncbi.nlm.nih.gov/30924254/)

### Which ingredients make this serum a poor fit for dry skin?

This serum is a weak match for dry skin because glycolic acid provides exfoliation that may make dryness worse, and the formula lacks enough moisturizing ingredients like squalane to fully address dry skin. A treatment of this type needs rich hydrating ingredients like ceramides, niacinamide, or peptides, along with soothing agents that protect the skin barrier and deliver deep moisture without irritation.

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

Tetrahexyldecyl ascorbate helps brighten and protect dry skin by providing antioxidant benefits that support collagen production. Because dry skin often needs extra support against daily damage, this ingredient works best when paired with nourishing moisturizers that keep skin soft and smooth.
Sources: [International Journal of Molecular Sciences, 2021](https://pubmed.ncbi.nlm.nih.gov/34445461/), [Journal of Cosmetic Dermatology, 2012](https://pubmed.ncbi.nlm.nih.gov/23174055/)

### What does Squalane do for dry skin?

Squalane helps keep dry skin soft and smooth by acting as a hydrating agent that locks in moisture and prevents water loss. It is unlikely to cause irritation and may protect the skin from damage while improving overall hydration.
Sources: [Advances in Food and Nutrition Research, 2012](https://pubmed.ncbi.nlm.nih.gov/22361190/), [Molecules, 2009](https://pubmed.ncbi.nlm.nih.gov/19169201/)

### Where does it go in a skincare routine for dry skin?

This treatment goes in the evening routine after cleansing and before your moisturizer. Because this product may dry out dry skin, this type of skin needs a rich moisturizer with nourishing plant oils and barrier-repairing ingredients like ceramides to lock in moisture and prevent flaking.

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

Using this serum with retinol may easily dry out and irritate your skin because both ingredients are very strong. If you decide to use them together, apply the retinol at night after your cleanser and follow with a rich moisturizer to keep your skin soft and smooth, while using this brightening serum at a completely different time of day.

### How often should I use it?

Start using this treatment once a week in the evening, because its exfoliating ingredients may exacerbate dry skin. If your skin feels comfortable and you see good results, you can carefully use it more often. A product for dry skin needs extra rich, softening ingredients like squalane and heavy plant oils to keep skin smooth and comfortable.

### Can it clog pores, cause breakouts or purging for dry skin?

This product is unlikely to clog pores or cause breakouts for dry skin, as negative reviews rarely mention this issue. A product of this type for dry skin needs rich, nourishing oils and gentle hydrators like ceramides and hyaluronic acid to keep your skin soft and smooth.

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

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

## Alternatives for dry skin

- [Beauty of Joseon Propolis + Niacinamide Glow Serum](https://lovi.care/skincare/uk/p/beauty-of-joseon/propolis-niacinamide-glow-serum/for/dry-skin) — Superior fit — £36.96 at Amazon
- [KraveBeauty Great Barrier Relief](https://lovi.care/skincare/uk/p/kravebeauty/great-barrier-relief/for/dry-skin) — Superior fit — £32.95 at Amazon
- [Augustinus Bader The Serum](https://lovi.care/skincare/uk/p/augustinus-bader/the-serum/for/dry-skin) — Superior fit — £248.00 at Amazon

## Routine for dry skin

### AM

- Cleanser: [CeraVe Hydrating Cleanser](https://lovi.care/skincare/uk/p/cerave/hydrating-facial-cleanser/for/dry-skin) — Superior fit — £8.29 at Amazon
- Hydrating Toner: [Dear, Klairs Supple Preparation Unscented Toner](https://lovi.care/skincare/uk/p/dear-klairs/supple-preparation-unscented-toner/for/dry-skin) — Superior fit — £11.49 at Amazon
- Moisturizer: [SKIN1004 Madagascar Centella Probio-Cica Enrich Cream](https://lovi.care/skincare/uk/p/skin1004/madagascar-centella-probio-cica-enrich-cream/for/dry-skin) — Superior fit — £14.74 at Amazon
- SPF: [Torriden DIVE-IN Mild Sunscreen](https://lovi.care/skincare/uk/p/torriden/dive-in-mild-sunscreen/for/dry-skin) — Superior fit — £22.00 at Amazon

### PM

- Pre-Cleanser: [MISSHA Ultra Hyalon Cleansing Cream](https://lovi.care/skincare/uk/p/missha/ultra-hyalon-cleansing-cream/for/dry-skin) — Superior fit — £13.58 at Amazon
- Cleanser: [CeraVe Hydrating Cleanser](https://lovi.care/skincare/uk/p/cerave/hydrating-facial-cleanser/for/dry-skin) — Superior fit — £8.29 at Amazon
- Serum or Treatment: [Peach & Lily Glass Skin Refining Serum](https://lovi.care/skincare/uk/p/peach-and-lily/glass-skin-refining-serum/for/dry-skin) — Superior fit — £59.74 at Amazon
- Moisturizer: [SKIN1004 Madagascar Centella Probio-Cica Enrich Cream](https://lovi.care/skincare/uk/p/skin1004/madagascar-centella-probio-cica-enrich-cream/for/dry-skin) — Superior fit — £14.74 at Amazon

### Weekly

- Pre-Cleanser: [MISSHA Ultra Hyalon Cleansing Cream](https://lovi.care/skincare/uk/p/missha/ultra-hyalon-cleansing-cream/for/dry-skin) — Superior fit — £13.58 at Amazon
- Cleanser: [CeraVe Hydrating Cleanser](https://lovi.care/skincare/uk/p/cerave/hydrating-facial-cleanser/for/dry-skin) — Superior fit — £8.29 at Amazon
- Nourishing Mask: [MEDIHEAL Vita Essential Mask](https://lovi.care/skincare/uk/p/mediheal/vita-essential-mask/for/dry-skin) — Superior fit — £17.00 at Amazon
- Serum or Treatment: [Peach & Lily Glass Skin Refining Serum](https://lovi.care/skincare/uk/p/peach-and-lily/glass-skin-refining-serum/for/dry-skin) — Superior fit — £59.74 at Amazon
- Moisturizer: [SKIN1004 Madagascar Centella Probio-Cica Enrich Cream](https://lovi.care/skincare/uk/p/skin1004/madagascar-centella-probio-cica-enrich-cream/for/dry-skin) — Superior fit — £14.74 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/dry-skin
- United Kingdom: https://lovi.care/skincare/uk/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin (this page)
- Ireland: https://lovi.care/skincare/ie/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- Germany: https://lovi.care/skincare/de/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- France: https://lovi.care/skincare/fr/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- Italy: https://lovi.care/skincare/it/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- Netherlands: https://lovi.care/skincare/nl/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- Spain: https://lovi.care/skincare/es/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- Canada: https://lovi.care/skincare/ca/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- Australia: https://lovi.care/skincare/au/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- Singapore: https://lovi.care/skincare/sg/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- Saudi Arabia: https://lovi.care/skincare/sa/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin
- United Arab Emirates: https://lovi.care/skincare/ae/p/sunday-riley/c-e-o-15-vitamin-c-brightening-serum/for/dry-skin